MolluscaBase taxon details

Helix Linnaeus, 1758

153970  (urn:lsid:marinespecies.org:taxname:153970)

accepted
Genus
Species Helix albescens Rossmässler, 1839
Species Helix anctostoma Martens, 1874
Species Helix antiochiensis Kobelt, 1896
Species Helix asemnis Bourguignat, 1860
Species Helix barbeyana De Stefani in De Stefani et al., 1891 †
Species Helix borealis Mousson, 1859
Species Helix buchii (Dubois de Montpéreux, 1840)
Species Helix calabrica Westerlund, 1876
Species Helix cincta O. F. Müller, 1774
Species Helix divionensis J. Martin, 1866 †
Species Helix dormitoris Kobelt, 1898
Species Helix engaddensis Bourguignat, 1852
Species Helix escherichi O. Boettger, 1898
Species Helix fathallae Nägele, 1901
Species Helix figulina Rossmässler, 1839
Species Helix gussoneana L. Pfeiffer, 1848
Species Helix kazouiniana Pallary, 1939
Species Helix krejcii Wenz in Krejci-Graf & Wenz, 1926 †
Species Helix ligata O. F. Müller, 1774
Species Helix lucorum Linnaeus, 1758
Species Helix lutescens Rossmässler, 1837
Species Helix melanostoma Draparnaud, 1801
Species Helix mileti Kobelt, 1906
Species Helix mrazeci Sevastos, 1922 †
Species Helix nucula Mousson, 1854
Species Helix pachya Bourguignat, 1860
Species Helix pathetica Mousson, 1854
Species Helix pelagonesica (Rolle, 1898)
Species Helix philibinensis Rossmässler, 1839
Species Helix pomacella Mousson, 1854
Species Helix pomatella Kobelt, 1876
Species Helix pomatia Linnaeus, 1758
Species Helix pronuba Westerlund & Blanc, 1879
Species Helix salomonica Nägele, 1899
Species Helix schlaeflii Mousson, 1859
Species Helix secernenda Rossmässler, 1847
Species Helix straminea Briganti, 1825
Species Helix subintersecta Bouguigant [in Locard], 1882
Species Helix sublutescens Wenz in Krejci & Wenz, 1926 †
Species Helix thessalica O. Boettger, 1886
Species Helix tourannensis Souleyet, 1852
Species Helix valentini Kobelt, 1891
Species Helix vladica (Kobelt, 1898)

Subgenus Helix (Patera) Albers, 1850 (taxon inquirendum, Invalid: junior homonym of Patera Lesson, 1839 [Cnidaria])
Species Helix adelaidae L. Pfeiffer, 1857 (taxon inquirendum)
Species Helix adipis White, 1886 † (taxon inquirendum)
Species Helix ajax L. Pfeiffer, 1861 (taxon inquirendum)
Species Helix alpillensis Roman, 1924 † (taxon inquirendum)
Species Helix appressa Say, 1821 (taxon inquirendum)
Species Helix aquensis Serres, 1829 † (taxon inquirendum)
Species Helix arvernensis Deshayes, 1863 † (taxon inquirendum)
Species Helix astierii A. d'Orbigny, 1850 † (taxon inquirendum)
Species Helix bartayresi Noulet, 1854 † (taxon inquirendum)
Species Helix batchianensis L. Pfeiffer, 1861 (taxon inquirendum)
Species Helix batesii L. Pfeiffer, 1860 (taxon inquirendum)
Species Helix boskovichi Dainelli, 1901 † (taxon inquirendum)
Species Helix boucheporni Noulet, 1867 † (taxon inquirendum)
Species Helix bourguignati L. Pfeiffer, 1857 (taxon inquirendum)
Species Helix briatextensis Noulet, 1867 † (taxon inquirendum)
Species Helix brusinae Dainelli, 1901 † (taxon inquirendum, status uncertain; also, junior homonym of Helix brusinae Stossich, 1876)
Species Helix carinata Link, 1807 (taxon inquirendum)
Species Helix carmeliensis L. Pfeiffer, 1861 (taxon inquirendum)
Species Helix chionodiscus L. Pfeiffer, 1857 (taxon inquirendum)
Species Helix chriacorum Cockerell, 1914 † (taxon inquirendum)
Species Helix cimex Reeve, 1854 (taxon inquirendum)
Species Helix cumulus Reeve, 1854 (taxon inquirendum)
Species Helix dalmatina Dainelli, 1901 † (taxon inquirendum)
Species Helix debauxii Noulet, 1854 † (taxon inquirendum)
Species Helix denainvilliersi De Boissy, 1839 † (taxon inquirendum)
Species Helix depsta Cox, 1870 (taxon inquirendum)
Species Helix dubia Deshayes, 1824 † (taxon inquirendum)
Species Helix duboisii Baily, 1858 † (taxon inquirendum)
Species Helix ductilis Pfeiffer, 1857 (taxon inquirendum)
Species Helix eumicron Deshayes, 1863 † (taxon inquirendum)
Species Helix evansi Meek & Hayden, 1860 † (taxon inquirendum)
Species Helix exacta L. Pfeiffer, 1863 (taxon inquirendum)
Species Helix faradensis L. Pfeiffer, 1861 (taxon inquirendum)
Species Helix fauna Philippi, 1851 (taxon inquirendum)
Species Helix ferrensis Serres, 1851 † (taxon inquirendum)
Species Helix flammata Férussac, 1821 (taxon inquirendum)
Species Helix fontani Noulet, 1854 † (taxon inquirendum)
Species Helix forrestiana Angas, 1875 (taxon inquirendum)
Species Helix fuelleborni E. von Martens, 1900 (taxon inquirendum)
Species Helix gassiesi Noulet, 1854 † (taxon inquirendum)
Species Helix grossularia L. Pfeiffer, 1861 (taxon inquirendum)
Species Helix guadalcanarensis Cox, 1872 (taxon inquirendum)
Species Helix guinaria L. Pfeiffer, 1861 (taxon inquirendum)
Species Helix hector L. Pfeiffer, 1861 (taxon inquirendum)
Species Helix insueta Noulet, 1867 † (taxon inquirendum)
Species Helix Iombersensis Noulet, 1867 † (taxon inquirendum)
Species Helix jasonis Mayer, 1856 † (taxon inquirendum)
Species Helix lespiaulti Noulet, 1854 † (taxon inquirendum)
Species Helix limosa Linnaeus, 1758 (taxon inquirendum)
Species Helix maeotica Steklov, 1966 † (taxon inquirendum)
Species Helix mendesi Roman, 1907 † (taxon inquirendum)
Species Helix mendicaria L. Pfeiffer, 1860 (taxon inquirendum)
Species Helix micheliniana Matheron, 1843 † (taxon inquirendum)
Species Helix monile Broderip, 1832 (taxon inquirendum)
Species Helix monsdraconensis Noulet, 1867 † (taxon inquirendum)
Species Helix moretonensis Reeve, 1854 (taxon inquirendum)
Species Helix nebrascensis Meek & Hayden, 1860 † (taxon inquirendum)
Species Helix orbiculata Férussac, 1822 (taxon inquirendum)
Species Helix palmarum Vinassa de Regny, 1896 † (taxon inquirendum)
Species Helix parvula A. Braun in Walchner, 1851 † (taxon inquirendum)
Species Helix perrisii Noulet, 1854 † (taxon inquirendum)
Species Helix personnati Noulet, 1857 † (taxon inquirendum)
Species Helix phocaea Roth, 1856 (taxon inquirendum)
Species Helix phrygica P. Fischer in Tchihatcheff, 1866 † (taxon inquirendum)
Species Helix plicatilis Deshayes, 1870 (taxon inquirendum)
Species Helix pliculosa L. Pfeiffer, 1857 (taxon inquirendum)
Species Helix portii L. Pfeiffer, 1861 (taxon inquirendum)
Species Helix prshewalskii Martens, 1881 (taxon inquirendum)
Species Helix prunum Férussac, 1821 (taxon inquirendum)
Species Helix pseudoligata Sinzov, 1896 † (taxon inquirendum)
Species Helix riparia White, 1876 † (taxon inquirendum)
Species Helix rupelli Deshayes, 1870 (taxon inquirendum)
Species Helix semicarinata Ancey, 1881 (taxon inquirendum)
Species Helix semifusca Deshayes, 1832 (taxon inquirendum)
Species Helix semiinversa Cossmann, 1913 † (taxon inquirendum)
Species Helix senensis Pantanelli, 1877 † (taxon inquirendum)
Species Helix sivericensis Dainelli, 1901 † (taxon inquirendum)
Species Helix spirata Serres, 1853 † (taxon inquirendum)
Species Helix subechinata Deshayes, 1870 (taxon inquirendum)
Species Helix subgranosa Le Guillou, 1842 (taxon inquirendum)
Species Helix sumatrana Martens, 1864 (taxon inquirendum)
Species Helix tescorum Benson, 1853 (taxon inquirendum)
Species Helix thibetica Deshayes, 1870 (taxon inquirendum)
Species Helix torus Matheron, 1843 † (taxon inquirendum)
Species Helix tristrami L. Pfeiffer, 1860 (taxon inquirendum)
Species Helix varnensis Toula, 1892 † (taxon inquirendum)
Species Helix veterna Meek & Hayden, 1861 † (taxon inquirendum)
Species Helix vetusta Meek & Hayden, 1860 † (taxon inquirendum)
Species Helix villosella Thomä, 1845 † (taxon inquirendum)
Species Helix yorkensis Reeve, 1854 (taxon inquirendum)

Species Helix calomorpha Jonas, 1839 (nomen dubium)
Species Helix eurabdota Fontannes, 1884 † (nomen dubium)
Species Helix gjalskii Brusina, 1902 † (nomen dubium)
Species Helix laevigata Linnaeus, 1767 accepted as Velutina laevigata (Linnaeus, 1767) (nomen dubium, original combination)
Species Helix minutialis Deshayes, 1851 (nomen dubium)
Species Helix multispirata Hombron & Jacquinot, 1852 (nomen dubium)
Species Helix oceanica Le Guillou, 1842 (nomen dubium)
Species Helix oddoi Brusina, 1902 † (nomen dubium)
Species Helix pilari Brusina, 1902 † (nomen dubium)
Species Helix rotula Hombron & Jacquinot, 1852 (nomen dubium, invalid: junior homonym of Helix rotula Lowe, 1831; no replacement name available)
Species Helix unispiralis Montagu, 1803 (nomen dubium)

Subgenus Helix (Pitys) H. Beck, 1837 (nomen nudum)
  » Species Helix (Pitys) oparana H. Beck, 1837 (nomen nudum)
Species Helix angulata Férussac, 1821 (nomen nudum)
Species Helix congellana Krauss mss in E. von Martens, 1860 (nomen nudum)
Species Helix exoptata Tate, 1882 (nomen nudum)
Species Helix globula Krynicki, 1838 (nomen nudum)
Species Helix roseri F. Krauss in E. von Martens, 1860 (nomen nudum)
Species Helix roseri Krauss in E. von Martens, 1860 (nomen nudum)
Species Helix somersetii Prime, 1853 (nomen nudum)

Species Helix rosacea Sowerby I, 1839 (temporary name, Invalid: junior homonym of Helix rosacea O. F. Müller, 1774)

Subgenus Helix (Helix) Linnaeus, 1758 represented as Helix Linnaeus, 1758
  » Species Helix (Helix) albescens Rossmässler, 1839 represented as Helix albescens Rossmässler, 1839
  » Species Helix (Helix) anctostoma Martens, 1874 represented as Helix anctostoma Martens, 1874
  » Species Helix (Helix) antiochiensis Kobelt, 1896 represented as Helix antiochiensis Kobelt, 1896
  » Species Helix (Helix) asemnis Bourguignat, 1860 represented as Helix asemnis Bourguignat, 1860
  » Species Helix (Helix) borealis Mousson, 1859 represented as Helix borealis Mousson, 1859
  » Species Helix (Helix) buchii (Dubois de Montpéreux, 1840) represented as Helix buchii (Dubois de Montpéreux, 1840)
  » Species Helix (Helix) calabrica Westerlund, 1876 represented as Helix calabrica Westerlund, 1876
  » Species Helix (Helix) cincta O. F. Müller, 1774 represented as Helix cincta O. F. Müller, 1774
  » Species Helix (Helix) dormitoris Kobelt, 1898 represented as Helix dormitoris Kobelt, 1898
  » Species Helix (Helix) escherichi O. Boettger, 1898 represented as Helix escherichi O. Boettger, 1898
  » Species Helix (Helix) fathallae Nägele, 1901 represented as Helix fathallae Nägele, 1901
  » Species Helix (Helix) gussoneana L. Pfeiffer, 1848 represented as Helix gussoneana L. Pfeiffer, 1848
  » Species Helix (Helix) krejcii Wenz in Krejci & Wenz, 1926 † represented as Helix krejcii Wenz in Krejci-Graf & Wenz, 1926 †
  » Species Helix (Helix) ligata O. F. Müller, 1774 represented as Helix ligata O. F. Müller, 1774
  » Species Helix (Helix) lucorum Linnaeus, 1758 represented as Helix lucorum Linnaeus, 1758
  » Species Helix (Helix) lutescens Rossmässler, 1837 represented as Helix lutescens Rossmässler, 1837
  » Species Helix (Helix) melanostoma Draparnaud, 1801 represented as Helix melanostoma Draparnaud, 1801
  » Species Helix (Helix) mileti Kobelt, 1906 represented as Helix mileti Kobelt, 1906
  » Species Helix (Helix) pathetica Mousson, 1854 represented as Helix pathetica Mousson, 1854
  » Species Helix (Helix) pelagonesica (Rolle, 1898) represented as Helix pelagonesica (Rolle, 1898)
  » Species Helix (Helix) philibinensis Rossmässler, 1839 represented as Helix philibinensis Rossmässler, 1839
  » Species Helix (Helix) pomacella Mousson, 1854 represented as Helix pomacella Mousson, 1854
  » Species Helix (Helix) pomatella Kobelt, 1876 represented as Helix pomatella Kobelt, 1876
  » Species Helix (Helix) pomatia Linnaeus, 1758 represented as Helix pomatia Linnaeus, 1758
  » Species Helix (Helix) pronuba Westerlund & Blanc, 1879 represented as Helix pronuba Westerlund & Blanc, 1879
  » Species Helix (Helix) schlaeflii Mousson, 1859 represented as Helix schlaeflii Mousson, 1859
  » Species Helix (Helix) secernenda Rossmässler, 1837 represented as Helix secernenda Rossmässler, 1847
  » Species Helix (Helix) straminea Briganti, 1825 represented as Helix straminea Briganti, 1825
  » Species Helix (Helix) sublutescens Wenz in Krejci & Wenz, 1926 † represented as Helix sublutescens Wenz in Krejci & Wenz, 1926 †
  » Species Helix (Helix) thessalica O. Boettger, 1886 represented as Helix thessalica O. Boettger, 1886
  » Species Helix (Helix) valentini Kobelt, 1891 represented as Helix valentini Kobelt, 1891
  » Species Helix (Helix) vladica (Kobelt, 1898) represented as Helix vladica (Kobelt, 1898)
Subgenus Helix (Pelasga) P. Hesse, 1908 represented as Helix Linnaeus, 1758

Species Helix "plicata" Born, 1778 accepted as Stenomelania plicaria (Born, 1778) (misspelled for plicaria [see erratum, p. 2], not H. plicata [p. 376])
Subgenus Helix (Acanthinula) H. Beck, 1847 accepted as Acanthinula H. Beck, 1847
Subgenus Helix (Aegista) Albers, 1850 accepted as Aegista Albers, 1850
Subgenus Helix (Aerope) E. von Martens, 1890 accepted as Natalina Pilsbry, 1893
Subgenus Helix (Aglaja) Albers, 1850 accepted as Lysinoe H. Adams & A. Adams, 1855 (Invalid: junior homonym of Aglaja Renier, 1807 [Opisthobranchia]; Lysinoe is a replacement name)
Subgenus Helix (Ampelita) H. Beck, 1837 accepted as Ampelita H. Beck, 1837 (original rank)
  » Species Helix (Ampelita) alluaudi Dautzenberg, 1895 accepted as Ampelita alluaudi (Dautzenberg, 1895) (original combination)
  » Species Helix (Ampelita) campbelliana Pilsbry in Tryon, 1890 accepted as Ampelita gaudens var. campbelliana (Pilsbry in Tryon, 1890) (original combination)
  » Species Helix (Ampelita) eurychila Crosse & P. Fischer, 1883 accepted as Ampelita sepulcralis (Férussac, 1821) (junior synonym)
  » Species Helix (Ampelita) gonostyla Ancey, 1882 accepted as Ampelita calypso (L. Pfeiffer, 1861) (junior synonym)
  » Species Helix (Ampelita) lamothei Dautzenberg, 1895 accepted as Ampelita lamothei (Dautzenberg, 1895)
  » Species Helix (Ampelita) lanciformis O. Boettger, 1889 accepted as Ampelita gaudens (Mabille, 1884) (junior synonym)
  » Species Helix (Ampelita) percyana E. A. Smith, 1880 accepted as Ampelita percyana (E. A. Smith, 1880) (original combination)
  » Species Helix (Ampelita) shavi E. A. Smith, 1879 accepted as Ampelita xystera (L. Pfeiffer, 1841) (junior synonym)
  » Species Helix (Ampelita) subatropos Dautzenberg, 1895 accepted as Ampelita subatropos (Dautzenberg, 1895) (original combination)
Subgenus Helix (Amphidoxa) Albers, 1850 accepted as Amphidoxa Albers, 1850 (original rank)
Subgenus Helix (Anguispira) Morse, 1864 accepted as Anguispira Morse, 1864
  » Species Helix (Anguispira) idahoensis (uncertain)
Subgenus Helix (Archelix) Albers, 1850 accepted as Otala Schumacher, 1817 (objective junior synonym)
Subgenus Helix (Arionta) Martens, 1860 accepted as Arianta W. Turton, 1831 (unjustified emendation of Arianta)
Subgenus Helix (Ariophanta) Des Moulins, 1829 accepted as Ariophanta Des Moulins, 1829 (original rank)
Subgenus Helix (Atopa) Albers, 1850 accepted as Corilla H. Adams & A. Adams, 1855 (Invalid: junior homonym of Atopa Paykull, 1799 [Coleoptera])
Subgenus Helix (Aulacospira) Möllendorff, 1890 accepted as Aulacospira Möllendorff, 1890
Subgenus Helix (Axina) Albers, 1850 accepted as Anixa Pilsbry, 1895 (Invalid: junior homonym of Axina Kirby, 1819 [Coleoptera]; Anixa is a replacement name)
Subgenus Helix (Bradybaena) Beck, 1837 accepted as Bradybaena H. Beck, 1837 (original rank)
Subgenus Helix (Buliminopsis) Heude, 1890 accepted as Buliminopsis Heude, 1890 accepted as Pseudobuliminus Gredler, 1886 (unaccepted rank)
Subgenus Helix (Callina) R. T. Lowe, 1855 accepted as Callina R. T. Lowe, 1855 (original rank)
Subgenus Helix (Camaena) Albers, 1850 accepted as Camaena Albers, 1850 (original rank)
  » Species Helix (Camaena) aureedensis Brazier, 1872 accepted as Figuladra incei lessoni (Pfeiffer, 1846) represented as Figuladra incei (Pfeiffer, 1846) (junior synonym)
  » Species Helix (Camaena) bairdi H. Adams, 1866 accepted as Satsuma bairdi (H. Adams, 1866) (original combination)
  » Species Helix (Camaena) barneyi Cox, 1873 accepted as Hadra barneyi (Cox, 1873) (original combination)
  » Species Helix (Camaena) billeti H. Fischer, 1898 accepted as Camaena billeti (H. Fischer, 1898) (original combination)
  » Species Helix (Camaena) challisi Cox, 1873 accepted as Figuladra challisi (Cox, 1873) (basionym)
  » Species Helix (Camaena) cicatricosa (O. F. Müller, 1774) accepted as Camaena cicatricosa (O. F. Müller, 1774)
  » Species Helix (Camaena) congenita E. A. Smith, 1878 accepted as Euhadra congenita (E. A. Smith, 1878) (original combination)
  » Species Helix (Camaena) contractiva Mabille, 1889 accepted as Camaena contractiva (Mabille, 1889) (unaccepted combination)
  » Species Helix (Camaena) duporti Bavay & Dautzenberg, 1909 accepted as Neotrachia duporti (Bavay & Dautzenberg, 1909) (basionym)
  » Species Helix (Camaena) editha A. Adams, 1868 accepted as Ainohelix editha (A. Adams, 1868) (original combination)
  » Species Helix (Camaena) gabriellae Dautzenberg & d'Hammonville, 1887 accepted as Camaena gabriellae (Dautzenberg & d'Hammonville, 1887)
  » Species Helix (Camaena) hainanensis H. Adams, 1870 accepted as Camaena hainanensis (H. Adams, 1870) (original combination)
  » Species Helix (Camaena) lavezzarii Bavay & Dautzenberg, 1900 accepted as Camaena choboensis (Mabille, 1889) (synonym)
  » Species Helix (Camaena) lewisii E. A. Smith, 1878 accepted as Satsuma lewisii (E. A. Smith, 1878) (original combination)
  » Species Helix (Camaena) miranda A. Adams, 1868 accepted as Karaftohelix blakeana (Newcomb, 1865) accepted as Ainohelix blakeana (Newcomb, 1865) (junior synonym)
  » Species Helix (Camaena) mirifica Bavay & Dautzenberg, 1908 accepted as Camaena mirifica (Bavay & Dautzenberg, 1908) (original combination)
  » Species Helix (Camaena) serotina A. Adams, 1868 accepted as Karaftohelix blakeana (Newcomb, 1865) accepted as Ainohelix blakeana (Newcomb, 1865) (junior synonym)
  » Species Helix (Camaena) succincta H. Adams, 1866 accepted as Satsuma succincta (H. Adams, 1866) (original combination)
  » Species Helix (Camaena) vayssierei Bavay & Dautzenberg, 1909 accepted as Camaena vayssierei (Bavay & Dautzenberg, 1909) (original combination)
  » Species Helix (Camaena) vorvonga Bavay & Dautzenberg, 1900 accepted as Camaena vorvonga (Bavay & Dautzenberg, 1900) (original combination)
Subgenus Helix (Camena) E. von Martens, 1860 accepted as Camaena Albers, 1850 (invalid: unjustified emendation of Camaena)
  » Species Helix (Camena) constantinae Adams, 1870 accepted as Cathaica constantinae (H. Adams, 1870) (original combination)
Subgenus Helix (Campylaea) H. Beck, 1837 accepted as Campylaea H. Beck, 1837
Subgenus Helix (Caprinus) Montfort, 1810 accepted as Pleurodonte Fischer von Waldheim, 1807
Subgenus Helix (Caracolina) H. Beck, 1837 accepted as Caracollina H. Beck, 1837 (incorrect subsequent spelling)
Subgenus Helix (Caracolla) Albers, 1850 accepted as Caracolla Albers, 1850 accepted as Caracolus Montfort, 1810 (unaccepted rank)
Subgenus Helix (Carocolla) accepted as Caracolus Montfort, 1810 (incorrect subsequent spelling)
Subgenus Helix (Carthusiana) Kobelt, 1871 accepted as Monacha Fitzinger, 1833
Subgenus Helix (Charopa) Martens, 1860 accepted as Charopa E. von Martens, 1860
  » Species Helix (Charopa) ammonitoides Brazier, 1871 accepted as Ammoniropa vigens (Legrand, 1871) (junior synonym)
  » Species Helix (Charopa) bassi Legrand, 1871 accepted as Ammoniropa vigens (Legrand, 1871) (junior synonym)
  » Species Helix (Charopa) camillae Legrand, 1871 accepted as Thryasona diemenensis (Cox, 1868) (junior synonym)
  » Species Helix (Charopa) curacoae Brazier, 1871 accepted as Protractiropa curacoae (Brazier, 1871) (original combination)
  » Species Helix (Charopa) dispar Brazier, 1871 accepted as Dentherona dispar (Brazier, 1871) (original combination)
  » Species Helix (Charopa) irvinae Legrand, 1871 accepted as Stenacapha hamiltoni (Cox, 1868) (junior synonym)
  » Species Helix (Charopa) limula Legrand, 1871 accepted as Tasmathera limula (Legrand, 1871) (original combination)
  » Species Helix (Charopa) midsoni Legrand, 1871 accepted as Thryasona diemenensis (Cox, 1868) (junior synonym)
  » Species Helix (Charopa) neglecta Brazier, 1871 accepted as Planilaoma luckmanii (Brazier, 1877) (invalid: junior homonym of Helix neglecta Draparnaud, 1805)
  » Species Helix (Charopa) onslowi Brazier, 1871 accepted as Tasmathera ricei (Brazier, 1871) (junior synonym)
  » Species Helix (Charopa) ricei Brazier, 1871 accepted as Tasmathera ricei (Brazier, 1871) (original combination)
  » Species Helix (Charopa) rotella Brazier, 1871 accepted as Tasmathera ricei (Brazier, 1871) (junior synonym)
  » Species Helix (Charopa) scrupulus Legrand, 1871 accepted as Stenacapha hamiltoni (Cox, 1868) (junior synonym)
  » Species Helix (Charopa) spoliata Legrand, 1871 accepted as Stenacapha hamiltoni (Cox, 1868) (junior synonym)
  » Species Helix (Charopa) subdepressa Brazier, 1872 accepted as Meredithena dandenongensis (Petterd, 1879) (invalid: junior homonym of Helix subdepressa d'Orbigny, 1852)
  » Species Helix (Charopa) thompsoni Legrand, 1871 accepted as Thryasona diemenensis (Cox, 1868) (junior synonym)
  » Species Helix (Charopa) wilkinsoni Brazier, 1889 accepted as Charopella wilkinsoni (Brazier, 1889) (original combination)
Subgenus Helix (Chilanodon) Westerlund, 1897 accepted as Chilanodon Westerlund, 1897 (original rank)
Subgenus Helix (Chloraea) Albers, 1850 accepted as Chloraea Albers, 1850 (original rank)
Subgenus Helix (Chloritis) Beck, 1837 accepted as Chloritis H. Beck, 1837 (original rank)
  » Species Helix (Chloritis) balansai Morlet, 1886 accepted as Trachia balansai (Morlet, 1886) accepted as Chloritis balansai (Morlet, 1886)
  » Species Helix (Chloritis) balatensis Kobelt, 1896 accepted as Chloritis balatensis (Kobelt, 1896) (original combination)
  » Species Helix (Chloritis) cavaleriei Bavay, 1913 accepted as Entadella cavaleriei (Bavay, 1913) (original combination)
  » Species Helix (Chloritis) cordieri Bavay & Dautzenberg, 1909 accepted as Trachia cordieri (Bavay & Dautzenberg, 1909) (original combination)
  » Species Helix (Chloritis) durandi Bavay & Dautzenberg, 1900 accepted as Trachia durandi (Bavay & Dautzenberg, 1900) accepted as Chloritis durandi (Bavay & Dautzenberg, 1900) (original combination)
  » Species Helix (Chloritis) gereti Bavay & Dautzenberg, 1900 accepted as Trichochloritis gereti (Bavay & Dautzenberg, 1900) (original combination)
  » Species Helix (Chloritis) lambineti Bavay & Dautzenberg, 1899 accepted as Trachia lambineti (Bavay & Dautzenberg, 1899) (original combination)
  » Species Helix (Chloritis) lemeslei Morlet, 1891 accepted as Camaena lemeslei (Morlet, 1891) accepted as Chloritis lemeslei (Morlet, 1891) (original combination)
  » Species Helix (Chloritis) limatulata Bavay & Dautzenberg, 1909 accepted as Trachia limatulata (Bavay & Dautzenberg, 1909) (original combination)
  » Species Helix (Chloritis) marimberti Bavay & Dautzenberg, 1900 accepted as Trachia marimberti (Bavay & Dautzenberg, 1900) accepted as Chloritis marimberti (Bavay & Dautzenberg, 1900) (original combination)
  » Species Helix (Chloritis) miara Mabille, 1887 accepted as Trichochloritis miara (Mabille, 1887) (unaccepted combination)
  » Species Helix (Chloritis) millepunctata E. A. Smith, 1894 accepted as Damochlora millepunctata (E. A. Smith, 1894) (basionym)
  » Species Helix (Chloritis) nasuta Bavay & Dautzenberg, 1909 accepted as Trachia nasuta (Bavay & Dautzenberg, 1909) accepted as Chloritis nasuta (Bavay & Dautzenberg, 1909) (original combination)
  » Species Helix (Chloritis) pseudomiara Bavay & Dautzenberg, 1909 accepted as Bellatrachia pseudomiara (Bavay & Dautzenberg, 1909) accepted as Trichochloritis pseudomiara (Bavay & Dautzenberg, 1909) (basionym)
  » Species Helix (Chloritis) rectilabrum E.A. Smith, 1894 accepted as Setobaudinia rectilabrum (E.A. Smith, 1894) (basionym)
  » Species Helix (Chloritis) remoratrix Morlet, 1893 accepted as Chloritis remoratrix (Morlet, 1893) (original combination)
  » Species Helix (Chloritis) schlosseriana Brusina, 1874 † accepted as Pseudochloritis schlosseriana (Brusina, 1874) † (new combination)
  » Species Helix (Chloritis) talabensis Kobelt, 1896 accepted as Chloritis talabensis (Kobelt, 1896) (original combination)
Subgenus Helix (Circinaria) Beck, 1837 accepted as Vallonia Risso, 1826 (junior synonym)
Subgenus Helix (Cochlicella) A. Férussac, 1821 accepted as Cochlicella A. Férussac, 1821
Subgenus Helix (Cochlicelle) [sic] accepted as Cochlicella A. Férussac, 1821 (misspelling)
Subgenus Helix (Cochlicopa) accepted as Cochlicopa A. Férussac, 1821 (original rank)
Subgenus Helix (Cochlitoma) Férussac, 1821 accepted as Cochlitoma A. Férussac, 1821 (original rank)
Subgenus Helix (Cochlodonta) A. Férussac, 1821 accepted as Cochlodonta A. Férussac, 1821 accepted as Cerion Röding, 1798
Subgenus Helix (Cochlogena) Férussac, 1821 accepted as Bulimulus Leach, 1814
  » Species Helix (Cochlogena) aedilis Férussac, 1821 accepted as Limicolaria kambeul (Bruguière, 1792) (junior synonym)
  » Species Helix (Cochlogena) apodemetes d'Orbigny, 1835 accepted as Bulimulus apodemetes (d'Orbigny, 1835) (original combination)
  » Species Helix (Cochlogena) aurisbovinus Férussac, 1821 accepted as Placostylus fibratus (Martyn, 1784)
  » Species Helix (Cochlogena) bahiensis S. Moricand, 1834 accepted as Bahiensis bahiensis (S. Moricand, 1834) (original combination)
  » Species Helix (Cochlogena) crepundia d'Orbigny, 1835 accepted as Naesiotus crepundia (d'Orbigny, 1835) (original combination)
  » Species Helix (Cochlogena) flammata Cailliaud, 1823 accepted as Bulimus cailliaudi L. Pfeiffer, 1850 accepted as Limicolaria cailliaudi (L. Pfeiffer, 1850) (junior primary homonym of Helix flammata Férussac, 1821)
  » Species Helix (Cochlogena) mathiusii d'Orbigny, 1835 accepted as Megalobulimus leucostoma (G. B. Sowerby I, 1835)
  » Species Helix (Cochlogena) montivaga d'Orbigny, 1835 accepted as Naesiotus montivagus (d'Orbigny, 1835) (original combination)
  » Species Helix (Cochlogena) rocayana d'Orbigny, 1835 accepted as Naesiotus rocayanus (d'Orbigny, 1835) (original combination)
  » Species Helix (Cochlogena) zebrula A. Férussac, 1821 accepted as Chondrus zebrula (A. Férussac, 1821) (basionym)
Subgenus Helix (Cochlostyla) A. Férussac, 1821 accepted as Cochlostyla A. Férussac, 1821
Subgenus Helix (Codringtonia) Kobelt, 1898 accepted as Codringtonia Kobelt, 1898 (original rank)
Subgenus Helix (Conulus) Fitzinger, 1833 accepted as Euconulus Reinhardt, 1883 (Invalid: junior homonym of Conulus Leske, 1778 [Echinodermata])
  » Species Helix (Conulus) liardeti Brazier, 1872 (taxon inquirendum)
  » Species Helix (Conulus) chersinella Dall, 1866 accepted as Pristiloma chersinella (Dall, 1866)
  » Species Helix (Conulus) darnleyensis Brazier, 1876 accepted as Coneuplecta pampini (Cox, 1868) (junior synonym)
  » Species Helix (Conulus) elasmodonta Reuss, 1861 † accepted as Strobilops (Eostrobilops) elasmodonta (Reuss, 1861) † accepted as Eostrobilops elasmodonta (Reuss, 1861) † (new combination)
  » Species Helix (Conulus) elleryi Brazier, 1875 accepted as Coneuplecta microconus (Mousson, 1865) accepted as Kaliella microconus (Mousson, 1865) (junior synonym)
  » Species Helix (Conulus) pampini Cox, 1868 accepted as Coneuplecta pampini (Cox, 1868) (original combination)
  » Species Helix (Conulus) parvissima Legrand, 1871 accepted as Trocholaoma parvissima (Legrand, 1871) (original combination)
  » Species Helix (Conulus) porti Brazier, 1876 accepted as Pupisoma porti (Brazier, 1876) (original combination)
  » Species Helix (Conulus) russelli Brazier, 1875 accepted as Sodaleta russelli (Brazier, 1875) (original name)
  » Species Helix (Conulus) subturritula G. Nevill & H. Nevill, 1871 accepted as Nesokaliella subturritula (G. Nevill & H. Nevill, 1871) (original combination)
Subgenus Helix (Corasia) Albers, 1850 accepted as Chloraea Albers, 1850 (Invalid: junior homonym of Corasia Huebner, 1826 [Lepidoptera])
  » Species Helix (Corasia) anadyomene A. Adams & Angas, 1864 accepted as Crystallopsis anadyomene (A. Adams & Angas, 1864) (original combination)
  » Species Helix (Corasia) balcombei Cox, 1873 accepted as Crystallopsis balcombei (Cox, 1873) (original combination)
  » Species Helix (Corasia) psyche Angas, 1870 accepted as Crystallopsis psyche (Angas, 1870) (original combination)
  » Species Helix (Corasia) rossiteri Angas, 1869 accepted as Crystallopsis rossiteri (Angas, 1869) (original combination)
  » Species Helix (Corasia) tricolor Pfeiffer, 1850 accepted as Crystallopsis tricolor (Pfeiffer, 1850)
  » Species Helix (Corasia) wisemani Brazier, 1876 accepted as Crystallopsis wisemani (Brazier, 1876) (basionym)
  » Species Helix (Corasia) woodfordi G. B. Sowerby III, 1890 accepted as Crystallopsis woodfordi (Sowerby III, 1890) (original combination)
Subgenus Helix (Corilla) H. Adams & A. Adams, 1855 accepted as Corilla H. Adams & A. Adams, 1855
  » Species Helix (Corilla) damarensis H. Adams, 1870 accepted as Sculptaria damarensis (H. Adams, 1870) (original combination)
  » Species Helix (Corilla) pettos Martens, 1868 accepted as Endothyrella pinacis (Benson, 1859) (junior synonym)
Subgenus Helix (Cornu) Born, 1778 accepted as Cornu Born, 1778
  » Species Helix (Cornu) aspersa O. F. Müller, 1774 accepted as Cornu aspersum (O. F. Müller, 1774) (superseded combination)
Subgenus Helix (Coryda) Albers, 1850 accepted as Coryda Albers, 1850 (original rank)
Subgenus Helix (Craspedaria) R. T. Lowe, 1852 accepted as Craspedaria R. T. Lowe, 1852 (original combination)
Subgenus Helix (Crenea) Albers, 1850 accepted as Creneatachea Zilch, 1960 † (junior homonym of Crenea Risso, 1826)
Subgenus Helix (Cryptaxis) R. T. Lowe, 1855 accepted as Leptaxis (Cryptaxis) R. T. Lowe, 1855 represented as Leptaxis R. T. Lowe, 1852
Subgenus Helix (Cryptomphalus) Charpentier, 1837 accepted as Cornu Born, 1778
Subgenus Helix (Crystallus) R. T. Lowe, 1855 accepted as Vitrea Fitzinger, 1833
Subgenus Helix (Cyrtochilus) F. Sandberger, 1875 † accepted as Cyrtochilus F. Sandberger, 1875 †
Subgenus Helix (Daedalochila) Beck, 1837 accepted as Daedalochila H. Beck, 1837 (original rank)
Subgenus Helix (Dentellocaracolus) Oppenheim, 1890 † accepted as Dentellocaracolus Oppenheim, 1890 †
Subgenus Helix (Dialeuca) Albers, 1850 accepted as Dialeuca Albers, 1850 (original rank)
Subgenus Helix (Dimorphoptychia) F. Sandberger, 1871 † accepted as Dimorphoptychia F. Sandberger, 1871 †
Subgenus Helix (Discus) Fitzinger, 1833 accepted as Discus Fitzinger, 1833
  » Species Helix (Discus) agnewi Legrand, 1871 accepted as Exquisitiropa agnewi (Legrand, 1871) (original combination)
  » Species Helix (Discus) coepta Legrand, 1871 accepted as Stenacapha hamiltoni (Cox, 1868) (junior synonym)
  » Species Helix (Discus) kingstonensis Legrand, 1871 accepted as Diemenoropa kingstonensis (Legrand, 1871) (original combination)
  » Species Helix (Discus) ramsgatensis Legrand, 1871 accepted as Protractiropa curacoae (Brazier, 1871) (junior synonym)
Subgenus Helix (Discus) Albers, 1850 accepted as Videna H. Adams & A. Adams, 1855 (invalid: junior homonym of Discus Fitzinger, 1833; Disculus and Videna are replacement names)
  » Species Helix (Discus) atkinsoni Legrand, 1871 accepted as Thryasona diemenensis (Cox, 1868) (junior synonym)
  » Species Helix (Discus) cerealis Cox, 1873 accepted as Trochomorpha meleagris (L. Pfeiffer, 1855) (invalid: junior homonym of H. cerealis Crosse, 1868; H. thorpeiana Brazier, 1883 is a replacement name)
  » Species Helix (Discus) daveyensis Legrand, 1871 accepted as Thryasona diemenensis (Cox, 1868) (junior synonym)
  » Species Helix (Discus) fuscoradiata Legrand, 1871 accepted as Thryasona diemenensis (Cox, 1868) (junior synonym)
  » Species Helix (Discus) juliformis Legrand, 1871 accepted as Diemenoropa kingstonensis (Legrand, 1871) (junior synonym)
  » Species Helix (Discus) lomonti Brazier, 1876 accepted as Trochomorpha lomonti (Brazier, 1876) (original combination)
  » Species Helix (Discus) marchianae Legrand, 1871 accepted as Thryasona diemenensis (Cox, 1868) (junior synonym)
  » Species Helix (Discus) officeri Legrand, 1871 accepted as Scelidoropa officeri (Legrand, 1871) (original combination)
  » Species Helix (Discus) spectra Legrand, 1871 accepted as Diemenoropa kingstonensis (Legrand, 1871) (junior synonym)
  » Species Helix (Discus) thorpeiana Brazier, 1883 accepted as Trochomorpha meleagris (L. Pfeiffer, 1855) (junior synonym)
  » Species Helix (Discus) vigens Legrand, 1871 accepted as Ammoniropa vigens (Legrand, 1871) (original combination)
Subgenus Helix (Dorcasia) Gray, 1838 accepted as Dorcasia Gray, 1838
Subgenus Helix (Endodonta) Albers, 1850 accepted as Endodonta Albers, 1850
Subgenus Helix (Epiphragmophora) Doering, 1875 accepted as Epiphragmophora Doering, 1875
Subgenus Helix (Erepta) Albers, 1850 accepted as Erepta Albers, 1850 (original rank)
Subgenus Helix (Erigone) Albers, 1850 accepted as Chloritis (Eustomopsis) Gude, 1906 represented as Chloritis H. Beck, 1837 (Invalid: junior homonym of Erigone Audouin, 1826 [Arachnida])
Subgenus Helix (Euhadra) Pilsbry, 1890 accepted as Euhadra Pilsbry, 1890
Subgenus Helix (Eulota) W. Hartmann, 1841 accepted as Eulota W. Hartmann, 1841 accepted as Fruticicola Held, 1838 (unaccepted rank)
Subgenus Helix (Euparypha) W. Hartmann, 1843 accepted as Theba Risso, 1826
Subgenus Helix (Eurycratera) H. Beck, 1837 accepted as Eurycratera H. Beck, 1837
Subgenus Helix (Eyryomphala) Beck, 1837 accepted as Discus Fitzinger, 1833 (junior synonym)
Subgenus Helix (Fruticicola) Held, 1838 accepted as Fruticicola Held, 1838 (considered a separate genus)
  » Species Helix (Fruticicola) apicalis Reuss, 1861 † accepted as Leucochroopsis apicalis (Reuss, 1861) † (new combination)
  » Species Helix (Fruticicola) collinsoni A. Adams, 1868 accepted as Trishoplita collinsoni (A. Adams, 1868) (original combination)
  » Species Helix (Fruticicola) commoda A. Adams, 1868 accepted as Trishoplita commoda (A. Adams, 1868) (original combination)
  » Species Helix (Fruticicola) craspedocheila A. Adams, 1868 accepted as Euhadra craspedocheila (A. Adams, 1868) (original combination)
  » Species Helix (Fruticicola) crebripunctata F. Sandberger, 1858 † accepted as Leucochroopsis crebripunctata (F. Sandberger, 1858) † (new combination)
  » Species Helix (Fruticicola) devexa Reuss, 1861 accepted as Apula devexa (Reuss, 1861) † (new combination)
  » Species Helix (Fruticicola) gibbosa A. Adams, 1868 accepted as Satsuma gibbosa (A. Adams, 1868)
  » Species Helix (Fruticicola) goniostoma Sandberger, 1872 † accepted as Klikia (Apula) goniostoma (Sandberger, 1872) † accepted as Apula goniostoma (Sandberger, 1872) † (new combination)
  » Species Helix (Fruticicola) homalospira Reuss, 1861 † accepted as Pseudomonacha homalospira (Reuss, 1861) † (new combination)
  » Species Helix (Fruticicola) mataianensis Nevill, 1882 accepted as Cathaica mataianensis (Nevill, 1882) (original combination)
  » Species Helix (Fruticicola) moedlingensis Schlosser, 1907 † accepted as Leucochroopsis kleinii (Klein, 1846) † (junior synonym)
  » Species Helix (Fruticicola) patruelis A. Adams, 1868 accepted as Satsuma patruelis (A. Adams, 1868) (original combination)
  » Species Helix (Fruticicola) peculiaris A. Adams, 1868 accepted as Satsuma japonica peculiaris (A. Adams, 1868) (original combination)
  » Species Helix (Fruticicola) proba A. Adams, 1868 accepted as Aegista proba (A. Adams, 1868) (original combination)
  » Species Helix (Fruticicola) pulvisculum Issel, 1874 accepted as Pupisoma pulvisculum (Issel, 1874) (original name)
  » Species Helix (Fruticicola) sphinctostoma A. Adams, 1868 accepted as Satsuma sphinctostoma (A. Adams, 1868) (original combination)
  » Species Helix (Fruticicola) subvillosa Sandberger, 1858 † accepted as Leucochroopsis (Palaeotrichia) subvillosa (Sandberger, 1858) † represented as Leucochroopsis subvillosa (Sandberger, 1858) † (new combination)
Subgenus Helix (Fruticocampylaea) Kobelt, 1871 accepted as Fruticocampylaea Kobelt, 1871 (original rank)
  » Species Helix (Fruticocampylaea) adshariensis Lindholm, 1913 accepted as Hesseola solidior (Mousson, 1873) (a junior synonym)
  » Species Helix (Fruticocampylaea) eichwaldi L. Pfeiffer, 1846 accepted as Caucasigena eichwaldi (L. Pfeiffer, 1846) (new combination)
  » Species Helix (Fruticocampylaea) gerassimovi Lindholm, 1913 accepted as Caucasigena eichwaldi rengarteni (Lindholm, 1913) (original combination)
  » Species Helix (Fruticocampylaea) gredleri Hilber, 1882 accepted as Cathaica przewalskii gredleri (Hilber, 1882) (original combination and rank)
  » Species Helix (Fruticocampylaea) ioannis Mortillet, 1854 accepted as Caucasocressa ioannis (Mortillet, 1854) (new combination)
  » Species Helix (Fruticocampylaea) phaeolaema O. Boettger, 1886 accepted as Teberdinia phaeolaema (O. Boettger, 1886) (original combination)
  » Species Helix (Fruticocampylaea) rengarteni Lindholm, 1913 accepted as Caucasigena eichwaldi rengarteni (Lindholm, 1913) (original combination)
  » Species Helix (Fruticocampylaea) zolotarevi Lindholm, 1913 accepted as Teberdinia flavolimbata (O. Boettger, 1883) (a junior synonym)
Subgenus Helix (Fruticoconus) Möllendorff, 1882 accepted as Fruticoconus Möllendorff, 1882 (original rank)
  » Species Helix (Fruticoconus) trochulus Möllendorff, 1882 (taxon inquirendum)
Subgenus Helix (Galactochilus) F. Sandberger, 1875 accepted as Polydontes (Galactochilus) F. Sandberger, 1875 represented as Polydontes Montfort, 1810 (basionym)
Subgenus Helix (Galaxias) Beck, 1837 accepted as Trigonephrus Pilsbry, 1905 (invalid: junior homonym of Galaxias Cuvier, 1816)
Subgenus Helix (Ganesella) W. T. Blanford, 1863 accepted as Ganesella W.T. Blanford, 1863 (original rank)
Subgenus Helix (Gastrodonta) Albers, 1850 accepted as Gastrodonta Albers, 1850 (original rank)
Subgenus Helix (Geotrochus) van Hasselt, 1823 accepted as Geotrochus van Hasselt, 1823
  » Species Helix (Geotrochus) adonis Angas, 1870 accepted as Papuina adonis (Angas, 1870) (original combination)
  » Species Helix (Geotrochus) brenchleyi Brazier, 1876 accepted as Papuina splendescens (Cox, 1866) (junior synonym)
  » Species Helix (Geotrochus) caerulescens Angas, 1870 accepted as Papuina caerulescens (Angas, 1870) (invalid: junior homonym of Helix caerulescens Gmelin, 1791)
  » Species Helix (Geotrochus) deidamia Angas, 1870 accepted as Papuina meta (L. Pfeiffer, 1856) (junior synonym)
  » Species Helix (Geotrochus) gelata Cox, 1873 accepted as Papuina gelata (Cox, 1873) (original combination)
  » Species Helix (Geotrochus) gorenduensis Brazier, 1886 accepted as Rhynchotrochus gorenduensis (Brazier, 1886) (original combination)
  » Species Helix (Geotrochus) guppyi E. A. Smith, 1885 accepted as Papuina guppyi (E. A. Smith, 1885) (original combination)
  » Species Helix (Geotrochus) gurgustii Cox, 1879 accepted as Rhynchotrochus gurgustii (Cox, 1879) (original combination)
  » Species Helix (Geotrochus) hargreavesi Angas, 1870 accepted as Papuina hargreavesi (Angas, 1870) (original combination)
  » Species Helix (Geotrochus) heimburgi Branesik, 1891 accepted as Papustyla hindei (Cox, 1886) (junior synonym)
  » Species Helix (Geotrochus) hermione Angas, 1870 accepted as Papuina hermione (Angas, 1869) (original combination)
  » Species Helix (Geotrochus) leucophaea Cox, 1872 accepted as Megalacron migratoria (Pfeiffer, 1855) (junior synonym)
  » Species Helix (Geotrochus) macfarlanei Cox, 1873 accepted as Megalacron macfarlanei (Cox, 1873) (original combination)
  » Species Helix (Geotrochus) mendoza Brazier, 1872 accepted as Papuina mendoza (Brazier, 1872) (original combination)
  » Species Helix (Geotrochus) moseleyi E. A. Smith, 1884 accepted as Helix novaegeorgiensis Cox, 1870 accepted as Megalacron novaegeorgiensis (Cox, 1870) (junior synonym)
  » Species Helix (Geotrochus) papillifera Klika, 1891 † accepted as Metacampylaea papillifera (Klika, 1891) † (new combination)
  » Species Helix (Geotrochus) perakensis Crosse, 1879 accepted as Ganesella acris perakensis (Crosse, 1879) (original combination)
  » Species Helix (Geotrochus) philomela Angas, 1872 accepted as Papuina philomela (Angas, 1872) (original combination)
  » Species Helix (Geotrochus) redempta Cox, 1873 accepted as Papuina redempta (Cox, 1873) (original combination)
  » Species Helix (Geotrochus) rufo-filosa Bock, 1881 accepted as Ganesella rufofilosa (Bock, 1881) (unaccepted combination)
  » Species Helix (Geotrochus) strabo Brazier, 1876 accepted as Rhynchotrochus strabo (Brazier, 1876) (original combination)
  » Species Helix (Geotrochus) tapparonei E. A. Smith, 1883 accepted as Rhynchotrochus naso (Martens, 1883) (junior synonym)
  » Species Helix (Geotrochus) thomsoni E. A. Smith, 1889 accepted as Rhynchotrochus misima (Iredale, 1941) (invalid: junior homonym of H. thomsoni Pfeiffer, 1871)
  » Species Helix (Geotrochus) vatheleti Bavay & Dautzenberg, 1899 accepted as Ganesella vatheleti (Bavay & Dautzenberg, 1899) (original combination)
  » Species Helix (Geotrochus) wiegmanni Martens, 1894 accepted as Rhynchotrochus wiegmanni (Martens, 1894) (original combination)
  » Species Helix (Geotrochus) yulensis Brazier, 1876 accepted as Rhynchotrochus yulensis (Brazier, 1876) (original combination)
Subgenus Helix (Glaphyra) Albers, 1850 accepted as Vallonia Risso, 1826 (Invalid: junior homonym of Glaphyra Newman, 1840 [Coleoptera])
Subgenus Helix (Glyptorhagada) Pilsbry, 1891 accepted as Glyptorhagada Pilsbry, 1890 (original rank)
Subgenus Helix (Gonostoma) Held, 1838 accepted as Helicodonta A. Férussac, 1821 (invalid: junior homonym of Gonostoma Rafinesque, 1810)
  » Species Helix (Gonostoma) baudinensis E. A. Smith, 1893 accepted as Baudinella baudinensis (E. A. Smith, 1893) (basionym)
  » Species Helix (Gonostoma) blaviana K. Miller, 1907 † accepted as Klikia praeosculina (K. Miller, 1907) † (junior synonym)
  » Species Helix (Gonostoma) collingii E. A. Smith, 1893 accepted as Setobaudinia collingii (E. A. Smith, 1893) (basionym)
  » Species Helix (Gonostoma) jungi O. Boettger, 1897 † accepted as Klikia jungi (O. Boettger, 1897) † (new combination)
  » Species Helix (Gonostoma) leubii K. Miller, 1907 † accepted as Klikia praeosculina (K. Miller, 1907) † (junior synonym)
  » Species Helix (Gonostoma) patuliformis Sacco, 1886 † accepted as Eostrobilops patuliformis (Sacco, 1886) † (new combination)
  » Species Helix (Gonostoma) praeosculina K. Miller, 1907 † accepted as Klikia praeosculina (K. Miller, 1907) † (new combination)
  » Species Helix (Gonostoma) sublenticuloides Łomnicki, 1886 † accepted as Canariella sublenticuloides (Łomnicki, 1886) † (new combination)
Subgenus Helix (Grandipatula) Cossmann, 1889 † accepted as Grandipatula Cossmann, 1889 †
Subgenus Helix (Hadra) Martens, 1860 accepted as Hadra E. von Martens, 1860
  » Species Helix (Hadra) bayensis Brazier, 1876 accepted as Figuladra bayensis (Brazier, 1876) (basionym)
  » Species Helix (Hadra) bennetti Brazier, 1872 accepted as Pallidelix bennetti (Brazier, 1872) (basionym)
  » Species Helix (Hadra) burnerensis E. A. Smith, 1894 accepted as Amplirhagada burnerensis (E. A. Smith, 1894) (basionym)
  » Species Helix (Hadra) cassandra Pfeiffer, 1864 accepted as Cupedora cassandra (Pfeiffer, 1864) (original combination)
  » Species Helix (Hadra) darwini Brazier, 1872 accepted as Spurlingia darwini (Brazier, 1872) (original combination)
  » Species Helix (Hadra) derbyi Cox, 1892 accepted as Westraltrachia derbyi (Cox, 1892) (original combination)
  » Species Helix (Hadra) elderi Bednall, 1892 accepted as Basedowena elderi (Bednall, 1892) (original combination)
  » Species Helix (Hadra) evandaleana Pfeiffer, 1864 accepted as Cupedora evandaleana (Pfeiffer, 1864) (original combination)
  » Species Helix (Hadra) everardensis Bednall, 1892 accepted as Pleuroxia everardensis (Bednall, 1892) (original combination)
  » Species Helix (Hadra) fodinalis Bednall, 1892 accepted as Sinumelon fodinalis (Bednall, 1892) (original combination)
  » Species Helix (Hadra) imitata E. A. Smith, 1894 accepted as Amplirhagada imitata (E.A. Smith, 1894) (basionym)
  » Species Helix (Hadra) lincolnensis Pfeiffer, 1864 accepted as Cupedora lincolnensis (Pfeiffer, 1864) (original combination)
  » Species Helix (Hadra) montalivetensis E. A. Smith, 1894 accepted as Amplirhagada montalivetensis (E.A. Smith, 1894) (basionym)
  » Species Helix (Hadra) oscarensis Cox, 1892 accepted as Westraltrachia oscarensis (Cox, 1892) (original combination)
  » Species Helix (Hadra) pancala Schmacker & Boettger, 1891 accepted as Pancala batanica pancala (Schmacker & Boettger, 1891) (original combination)
  » Species Helix (Hadra) parsoni Cox, 1872 accepted as Figuladra incei curtisiana (Pfeiffer, 1864) represented as Figuladra incei (Pfeiffer, 1846) (junior synonym)
  » Species Helix (Hadra) patruelis Angas, 1864 accepted as Cupedora patruelis (Angas, 1864) (basionym)
  » Species Helix (Hadra) prudhoensis E. A. Smith, 1894 accepted as Globorhagada prudhoensis (E.A. Smith, 1894)
  » Species Helix (Hadra) rufofasciata Brazier, 1875 accepted as Cupedora rufofasciata (Brazier, 1875) (basionym)
  » Species Helix (Hadra) stephensoniana Brazier, 1872 accepted as Temporena sardalabiata (Cox, 1871) (junior synonym)
  » Species Helix (Hadra) sublorioliana Pilsbry, 1890 accepted as Cupedora sublorioliana (Pilsbry, 1890) (basionym)
  » Species Helix (Hadra) sykesi E. A. Smith, 1894 accepted as Amplirhagada sykesi (E.A. Smith, 1894) (basionym)
  » Species Helix (Hadra) yeppoonensis Beddome, 1897 accepted as Figuladra incei lessoni (Pfeiffer, 1846) represented as Figuladra incei (Pfeiffer, 1846) (junior synonym)
Subgenus Helix (Helicella) Gray, 1847 accepted as Helicella A. Férussac, 1821
  » Species Helix (Helicella) planorbitanus De Gregorio, 1880 † (taxon inquirendum)
  » Species Helix (Helicella) ambiguosa Ferussac, 1821 accepted as Trigonephrus ambiguosus (Ferussac, 1821) (original combination)
  » Species Helix (Helicella) berytensis L. Pfeiffer, 1841 accepted as Metafruticicola berytensis (L. Pfeiffer, 1841) (original combination)
  » Species Helix (Helicella) carnicolor Férussac, 1821 accepted as Hemitrochus varians (Menke, 1829) (nomen nudum)
  » Species Helix (Helicella) cretica L. Pfeiffer, 1841 accepted as Xerocrassa cretica (L. Pfeiffer, 1841) (original combination)
  » Species Helix (Helicella) draparnaldi Beck, 1837 accepted as Oxychilus draparnaudi (H. Beck, 1837) (replacement name)
  » Species Helix (Helicella) fallaciosa Férussac, 1832 accepted as Trachia fallaciosa (Férussac, 1832) (original combination)
  » Species Helix (Helicella) modestiuscula De Gregorio, 1880 † accepted as Dentellocaracolus modestiusculus (De Gregorio, 1880) † (new combination)
  » Species Helix (Helicella) proxima Férussac, 1832 accepted as Trachia proxima (Férussac, 1832) (original combination)
  » Species Helix (Helicella) pusilla Lowe, 1831 accepted as Paralaoma servilis (Shuttleworth, 1852) (name preoccupied)
  » Species Helix (Helicella) richardii Férussac, 1821 accepted as Allogona profunda (Say, 1821) (nomen nudum)
  » Species Helix (Helicella) sepulcralis Férussac, 1821 accepted as Ampelita sepulcralis (Férussac, 1821) (original combination)
  » Species Helix (Helicella) similaris Férussac, 1821 accepted as Bradybaena similaris (Férussac, 1822) (invalid: nomen nudum)
Subgenus Helix (Helicigona) Férussac, 1821 accepted as Helicigona A. Férussac, 1821
Subgenus Helix (Helicodonta) A. Férussac, 1821 accepted as Helicodonta A. Férussac, 1821
Subgenus Helix (Helicogena) A. Férussac, 1821 accepted as Helix Linnaeus, 1758 (junior synonym)
  » Species Helix (Helicogena) auricoma Férussac, 1821 accepted as Zachrysia auricoma (Férussac, 1821)
  » Species Helix (Helicogena) barbeyana De Stefani in De Stefani et al., 1891 † accepted as Helix barbeyana De Stefani in De Stefani et al., 1891 †
  » Species Helix (Helicogena) cavata Mousson, 1854 accepted as Helix engaddensis Bourguignat, 1852
  » Species Helix (Helicogena) engaddensis Bourguignat, 1852 accepted as Helix engaddensis Bourguignat, 1852
  » Species Helix (Helicogena) kisonis Kobelt, 1905 accepted as Helix engaddensis Bourguignat, 1852
  » Species Helix (Helicogena) similaris Férussac, 1822 accepted as Bradybaena similaris (Férussac, 1822) (basionym)
  » Species Helix (Helicogena) volensis Kobelt, 1906 accepted as Helix pelagonesica (Rolle, 1898) (junior synonym)
  » Species Helix (Helicogena) wohlberedti Kobelt, 1905 accepted as Helix vladica (Kobelt, 1898) (junior synonym)
Subgenus Helix (Helicomela) R. T. Lowe, 1855 accepted as Caseolus (Helicomela) R. T. Lowe, 1855 represented as Caseolus R. T. Lowe, 1852 (basionym)
Subgenus Helix (Helicophanta) A. Férussac, 1821 accepted as Helicophanta A. Férussac, 1821
Subgenus Helix (Helocogena) [sic] accepted as Helicogena A. Férussac, 1821 accepted as Helix Linnaeus, 1758 (misspelling)
Subgenus Helix (Hemistenotrema) O. Boettger, 1897 † accepted as Hemistenotrema O. Boettger, 1897 †
Subgenus Helix (Hyalina) S. Studer, 1820 accepted as Vitrina Draparnaud, 1801 (junior objective synonym)
Subgenus Helix (Hygromia) Risso, 1826 accepted as Hygromia Risso, 1826
  » Species Helix (Hygromia) bednalli Brazier, 1872 accepted as Cupedora bednalli (Brazier, 1872) (original combination)
Subgenus Helix (Hystricella) R. T. Lowe, 1855 accepted as Hystricella R. T. Lowe, 1855 (original rank)
Subgenus Helix (Iberus) Montfort, 1810 accepted as Iberus Montfort, 1810
Subgenus Helix (Isomeria) Albers, 1850 accepted as Isomeria Albers, 1850 (original rank)
  » Species Helix (Isomeria) equestrata Germain, 1907 accepted as Isomeria globosa (Broderip, 1832) (junior synonym)
  » Species Helix (Isomeria) fordiana Pilsbry, 1889 accepted as Isomeria fordiana (Pilsbry, 1889) (original combination)
  » Species Helix (Isomeria) gealei E.A. Smith, 1877 accepted as Isomeria gealei (E.A. Smith, 1877) (original combination)
  » Species Helix (Isomeria) peritropis Pilsbry, 1889 accepted as Isomeria continua (Reeve, 1854) (junior synonym)
  » Species Helix (Isomeria) scalena Martens, 1881 accepted as Isomeria scalena (Martens, 1881) (original combination)
  » Species Helix (Isomeria) wolfi Reibisch, 1896 accepted as Isomeria aequatoriana (Hidalgo, 1867) (junior synonym)
Subgenus Helix (Isthmia) Gray, 1821 accepted as Vertigo (Isthmia) Gray, 1821 represented as Vertigo O. F. Müller, 1773 (original name)
Subgenus Helix (Jacosta) Gray, 1821 accepted as Xerosecta Monterosato, 1892 (inalid: Placed on Index)
  » Species Helix (Jacosta) amphiconus Maltzan, 1883 accepted as Xerocrassa amphiconus (Maltzan, 1883) (original combination)
Subgenus Helix (Janira) Albers, 1850 accepted as Oreobba Pilsbry, 1894 (Invalid: junior homonym of Janira Leach, 1814 [Crustacea]; Oreooba is a replacement name)
Subgenus Helix (Jasonella) Lindholm, 1927 accepted as Jasonella Lindholm, 1927 (new combination)
Subgenus Helix (Katostoma) R. T. Lowe, 1855 accepted as Leptaxis (Katostoma) R. T. Lowe, 1855 represented as Leptaxis R. T. Lowe, 1852 (basionym)
Subgenus Helix (Labyrinthus) Beck, 1837 (unaccepted)
Subgenus Helix (Leiocheila) Albers, 1850 (unaccepted, objective junior synonym)
Subgenus Helix (Lemniscia) R. T. Lowe, 1855 (unaccepted)
Subgenus Helix (Leucochroa) H. Beck, 1837 (unaccepted, junior synonym)
Subgenus Helix (Levantina) Kobelt, 1871 (unaccepted)
  » Species Helix (Levantina) arnoldi Rolle in Kobelt, 1895 accepted as Levantina caesareana (Mousson, 1854) (junior synonym)
  » Species Helix (Levantina) caesareana Mousson, 1854 accepted as Levantina caesareana (Mousson, 1854)
  » Species Helix (Levantina) eliae Kobelt, 1895 accepted as Levantina caesareana (Mousson, 1854) (junior synonym)
  » Species Helix (Levantina) gerstenbrandti Kobelt, 1895 accepted as Levantina caesareana (Mousson, 1854) (junior synonym)
  » Species Helix (Levantina) kurdistana (L. Pfeiffer, 1861) accepted as Levantina kurdistana (L. Pfeiffer, 1861) (superseded generic combination)
  » Species Helix (Levantina) praecellens Naegele, 1901 accepted as Amanica praecellens (Naegele, 1901) (basionym)
  » Species Helix (Levantina) ramlensis Rolle in Kobelt, 1895 accepted as Levantina caesareana (Mousson, 1854) (junior synonym)
  » Species Helix (Levantina) transjordanica Kobelt, 1896 accepted as Levantina caesareana (Mousson, 1854) (junior synonym)
  » Species Helix (Levantina) werneri Kobelt, 1889 accepted as Levantina caesareana (Mousson, 1854) (junior synonym)
Subgenus Helix (Macrocyclis) Beck, 1837 (unaccepted)
Subgenus Helix (Macularia) Albers, 1850 (unaccepted)
  » Species Helix (Macularia) bohemica O. Boettger, 1870 † accepted as Megalotachea macrocheila (Reuss in Reuss & Meyer, 1849) † (junior synonym)
  » Species Helix (Macularia) caesareana Mousson, 1864 accepted as Levantina caesareana (Mousson, 1854)
  » Species Helix (Macularia) eckingensis F. Sandberger, 1875 † accepted as Cepaea eckingensis (F. Sandberger, 1875) † (new combination)
  » Species Helix (Macularia) majoris De Stefani, 1880 † accepted as Murella (Opica) majoris (De Stefani, 1880) † accepted as Marmorana majoris (De Stefani, 1880) † (new combination)
  » Species Helix (Macularia) ogdeni Kennard & Woodward, 1914 † accepted as Allognathus (Iberellus) ogdeni (Kennard & Woodward, 1914) † represented as Allognathus ogdeni (Kennard & Woodward, 1914) † (new combination)
  » Species Helix (Macularia) ogerieni Delafond & Depéret, 1893 † accepted as Frechenia ogerieni (Delafond & Depéret, 1893) † (new combination)
  » Species Helix (Macularia) platychelodes F. Sandberger, 1875 † accepted as Palaeotachea sylvestrina (Schlotheim, 1820) † accepted as Megalotachea sylvestrina (Schlotheim, 1820) † (junior synonym)
  » Species Helix (Macularia) pliobraidensis Sacco, 1889 † accepted as Schlickumia bottinii (Sacco, 1884) † (junior synonym)
  » Species Helix (Macularia) renevieri Maillard, 1892 † accepted as Palaeotachea renevieri (Maillard, 1892) † (new combination)
  » Species Helix (Macularia) torresi Roman, 1907 † accepted as Pseudotachea torresi (Roman, 1907) † (new combination)
  » Species Helix (Macularia) vermiculata O.F. Müller, 1774 accepted as Massylaea vermiculata (O. F. Müller, 1774)
Subgenus Helix (Mesodon) A. Férussac, 1821 (unaccepted)
  » Species Helix (Mesodon) dallii Stearns in White, 1885 † accepted as Vespericola dallii (Stearns in White, 1885) † (new combination (cf.))
  » Species Helix (Mesodon) kiowaensis Simpson, 1888 accepted as Patera kiowaensis (Simpson, 1888)
  » Species Helix (Mesodon) lawae Lewis, 1874 accepted as Praticolella lawae (J. Lewis, 1874) (emendation)
  » Species Helix (Mesodon) lawii Lewis, 1874 accepted as Praticolella lawae (J. Lewis, 1874) (incorrect original spelling)
  » Species Helix (Mesodon) columbiana (uncertain)
  » Species Helix (Mesodon) mullani (uncertain)
Subgenus Helix (Metodontia) Möllendorff, 1886 (unaccepted, original rank)
Subgenus Helix (Microcystis) Beck, 1838 (unaccepted)
  » Species Helix (Microcystis) catletti Brazier, 1872 accepted as Innesoconcha catletti (Brazier, 1872) (original combination)
Subgenus Helix (Micromphalia) Ancey, 1882 (unaccepted, original rank)
Subgenus Helix (Microphysa) E. von Martens, 1903 (unaccepted)
Subgenus Helix (Microphyura) Ancey, 1882 (unaccepted, original rank)
Subgenus Helix (Mitra) Albers, 1850 (unaccepted, invalid: junior homonym of Mitra Lamarck, 1798; Lampadia is a replacement name)
Subgenus Helix (Moellendorffia) Ancey, 1887 (unaccepted)
Subgenus Helix (Monomphalus) Ancey, 1882 (unaccepted, original rank)
Subgenus Helix (Mycena) Albers, 1850 (unaccepted, objective junior synonym )
Subgenus Helix (Nanina) Gray, 1834 (unaccepted, superseded combination)
  » Species Helix (Nanina) caesia L. Pfeiffer, 1861 (taxon inquirendum)
  » Species Helix (Nanina) cleamesi E. A. Smith, 1882 accepted as Kalidos cleamesi (E. A. Smith, 1882) (original combination)
  » Species Helix (Nanina) döhrniana L. Pfeiffer, 1860 accepted as Sarika dohrniana (L. Pfeiffer, 1860) (original combination)
  » Species Helix (Nanina) maarseveeni Bock, 1881 accepted as Dyakia maarseveeni (Bock, 1881) (original combination)
  » Species Helix (Nanina) mouhoti L. Pfeiffer, 1860 accepted as Cryptozona mouhoti (L. Pfeiffer, 1860) (original combination)
  » Species Helix (Nanina) nitidissima E. A. Smith, 1885 accepted as Orpiella nitidissima (E. A. Smith, 1885) accepted as Orpiella treasuryensis (Tryon, 1886) (original combination)
  » Species Helix (Nanina) nyassana E. A. Smith, 1881 accepted as Thapsia nyassana (E. A. Smith, 1881) (original combination)
  » Species Helix (Nanina) scorpio Gould, 1846 accepted as Orpiella scorpio (Gould, 1846) (original combination)
  » Species Helix (Nanina) solidiuscula E. A. Smith, 1885 accepted as Orpiella solidiuscula (E. A. Smith, 1885) (original combination)
Subgenus Helix (Obba) Beck, 1837 (unaccepted)
  » Species Helix (Obba) goldiei Brazier, 1884 accepted as Meliobba goldiei (Brazier, 1884) (original combination)
  » Species Helix (Obba) hyperbolica F. Sandberger, 1870 † accepted as Dentellocaracolus hyperbolica (F. Sandberger, 1870) † (new combination)
  » Species Helix (Obba) langsonensis Bavay & Dautzenberg, 1899 accepted as Neocepolis merarcha (Mabille, 1888) (junior synonym)
  » Species Helix (Obba) oxystoma E. A. Smith, 1883 accepted as Meliobba goldiei (Brazier, 1884) (invalid: junior homonym of Helix oxystoma Thomae, 1845)
Subgenus Helix (Obbinula) Stache, 1889 † (unaccepted)
Subgenus Helix (Ochthephila) Beck, 1837 (unaccepted, junior synonym)
Subgenus Helix (Omalonyx) d'Orbigny, 1838 (unaccepted, original rank)
Subgenus Helix (Ophiogyra) Albers, 1850 (unaccepted, objective junior synonym)
Subgenus Helix (Pachya) Albers, 1850 (unaccepted, original rank)
Subgenus Helix (Pachystoma) Albers, 1850 (unaccepted, Invalid: junior homonym of Pachystoma Guilding, 1828 [Ampullariidae].)
Subgenus Helix (Papuina) Martens, 1860 (unaccepted)
  » Species Helix (Papuina) albocarinata E. A. Smith, 1887 accepted as Rhynchotrochus albocarinatus (E. A. Smith, 1887) (original combination)
  » Species Helix (Papuina) amphizona Pilsbry, 1891 accepted as Papustyla chancei (Cox, 1870) (junior synonym)
  » Species Helix (Papuina) demangei Dautzenberg & Fischer, 1907 accepted as Ganesella demangei (Dautzenberg & Fischer, 1907) (original combination)
  » Species Helix (Papuina) lintschuana Kobelt, 1894 accepted as Meliobba lintschuana (Kobelt, 1894) (original combination)
  » Species Helix (Papuina) pallens Bavay, 1908 accepted as Dendrotrochus leucotropis (Pfeiffer, 1861) (junior synonym)
  » Species Helix (Papuina) phaeostoma Martens, 1878 accepted as Megalacron phaeostoma (Pfeiffer, 1877)
  » Species Helix (Papuina) rollsiana E. A. Smith, 1887 accepted as Rhynchotrochus rollsianus (E. A. Smith, 1887) (original combination)
  » Species Helix (Papuina) roseolabiata E. A. Smith, 1887 accepted as Rhynchotrochus strabo (Brazier, 1876) (junior synonym)
  » Species Helix (Papuina) walleri Brazier, 1883 accepted as Papuina walleri (Brazier, 1883) (original combination)
Subgenus Helix (Parachloraea) Sandberger, 1873 † (unaccepted, considered a separate genus)
Subgenus Helix (Pararhytida) Ancey, 1882 (unaccepted, original rank)
Subgenus Helix (Parthena) Albers, 1850 (unaccepted, original rank)
Subgenus Helix (Paryphanta) Albers, 1850 (unaccepted, original rank)
Subgenus Helix (Patula) Held, 1838 (unaccepted)
  » Species Helix (Patula) cryophila E. v. Martens, 1865 accepted as Paralaoma servilis (Shuttleworth, 1852) (junior synonym)
  » Species Helix (Patula) depressa A. Adams, 1868 accepted as Discus pauper (Gould, 1859) (junior synonym)
  » Species Helix (Patula) dubitans Legrand, 1871 accepted as Tasmaphena ruga (Legrand, 1871) (junior synonym)
  » Species Helix (Patula) falcifera O. Boettger, 1870 † accepted as Pleurodiscoides (Pleurodiscoides) falcifera (O. Boettger, 1870) † represented as Pleurodiscoides falcifera (O. Boettger, 1870) † (new combination)
  » Species Helix (Patula) margatensis Legrand, 1871 accepted as Tasmaphena ruga (Legrand, 1871) (junior synonym)
  » Species Helix (Patula) paludinaeformis (Sandberger, 1858) † accepted as Acanthinula paludinaeformis (Sandberger, 1858) † (new combination)
  » Species Helix (Patula) recurrecta Oppenheim, 1890 † accepted as Pyramidula recurrecta (Oppenheim, 1890) † (new combination)
  » Species Helix (Patula) saucatsensis Benoist, 1873 † accepted as Discus saucatsensis (Benoist, 1873) † (new combination)
  » Species Helix (Patula) sepulta White, 1880 † accepted as Patula whitei Wenz, 1919 † accepted as Discus whitei (Wenz, 1919) † (junior homonym of Helix sepulta Michelotti, 1840; Patula whitei is a replacement name)
  » Species Helix (Patula) somersetensis Melvill & Ponsonby, 1893 accepted as Trachycystis somersetensis (Melvill & Ponsonby, 1893) (original combination)
  » Species Helix (Patula) spaldingi Brazier, 1876 accepted as Torresiropa spaldingi (Brazier, 1876) (original combination)
  » Species Helix (Patula) stephensi Legrand, 1871 accepted as Stenacapha hamiltoni (Cox, 1868) (junior synonym)
  » Species Helix (Patula) stokesi E. A. Smith, 1884 accepted as Neophenacohelix lucetta (Hutton, 1884)
  » Species Helix (Patula) subteres Clessin, 1877 † accepted as Lucilla subteres (Clessin, 1877) † (new combination)
  » Species Helix (Patula) unwini Brazier, 1889 accepted as Hawaiia minuscula (Binney, 1841) (junior synonym)
  » Species Helix (Patula) vexanda Legrand, 1871 accepted as Tasmaphena ruga (Legrand, 1871) (junior synonym)
  » Species Helix (Patula) viridescens Melvill & Ponsonby, 1891 accepted as Natella viridescens (Melvill & Ponsonby, 1891) (basionym)
  » Species Helix (Patula) perspectiva (uncertain)
Subgenus Helix (Pella) E. von Martens, 1860 (unaccepted, synonym)
  » Species Helix (Pella) actinotrichia Melvill & Ponsonby, 1892 accepted as Chilocystis actinotrichia (Melvill & Ponsonby, 1892) (original combination)
  » Species Helix (Pella) bathycoele Melvill & Ponsonby, 1892 accepted as Trachycystis bathycoele (Melvill & Ponsonby, 1892) (original combination)
  » Species Helix (Pella) burnupi Melvill & Ponsonby, 1892 accepted as Chalcocystis burnupi (Melvill & Ponsonby, 1892) (original combination)
  » Species Helix (Pella) conisalea Melvill & Ponsonby, 1892 accepted as Chilocystis conisalea (Melvill & Ponsonby, 1892) (original combination)
  » Species Helix (Pella) crawfordi Melvill & Ponsonby, 1890 accepted as Sheldonia crawfordi (Melvill & Ponsonby, 1890) (original combination)
  » Species Helix (Pella) epetrima Melvill & Ponsonby, 1892 accepted as Phaulocystis turmalis (Morelet, 1889) (synonym)
  » Species Helix (Pella) erateina Melvill & Ponsonby, 1892 accepted as Lyrocystis prionacis (Benson, 1864) (synonym)
  » Species Helix (Pella) liricostata Melvill & Ponsonby, 1891 accepted as Trachycystis liricostata (Melvill & Ponsonby, 1891) (original combination)
  » Species Helix (Pella) lygaea Melvill & Ponsonby, 1892 accepted as Chilocystis lygaea (Melvill & Ponsonby, 1892) (original combination)
  » Species Helix (Pella) minythodes Melvill & Ponsonby, 1892 accepted as Sheldonia crawfordi (Melvill & Ponsonby, 1890) (synonym)
  » Species Helix (Pella) namaquana E. von Martens, 1889 accepted as Xerocystis capensis var. namaquana (E. von Martens, 1889) (original combination)
  » Species Helix (Pella) rhysodes Melvill & Ponsonby, 1892 accepted as Lyrocystis perplicata (Benson, 1851) (synonym)
  » Species Helix (Pella) strobilodes Melvill & Ponsonby, 1893 accepted as Chilocystis trichosteiroma (Melvill & Ponsonby, 1892) (synonym)
  » Species Helix (Pella) trichosteiroma Melvill & Ponsonby, 1892 accepted as Chilocystis trichosteiroma (Melvill & Ponsonby, 1892) (original combination)
  » Species Helix (Pella) turguriolum Melvill & Ponsonby, 1892 accepted as Trachycystis (Trachycystis) tollini (Benson, 1856) represented as Trachycystis tollini (Benson, 1856) (synonym)
Subgenus Helix (Petasia) Beck, 1837 (unaccepted, Invalid: junior homonym of Petasia Stephens, 1829 [Lepidoptera])
Subgenus Helix (Phaedra) Albers, 1850 (unaccepted, Invalid: junior homonym of Phaedra Horsfield, 1829 [Lepidoptera])
Subgenus Helix (Phania) E. von Martens, 1860 (unaccepted)
  » Species Helix (Phania) dugasti Morlet, 1892 accepted as Camaena dugasti (Morlet, 1892) (original combination)
  » Species Helix (Phania) kuekenthali Kobelt, 1895 accepted as Pyrochilus kuekenthali (Kobelt, 1895) (basionym)
Subgenus Helix (Phasis) Albers, 1850 (unaccepted, junior synonym)
  » Species Helix (Phasis) meruensis D'Ailly, 1910 accepted as Halolimnohelix meruensis (D'Ailly, 1910) (original combination)
Subgenus Helix (Philina) Albers, 1850 (unaccepted, junior synonym)
Subgenus Helix (Physospira) C.R. Boettger, 1914 (unaccepted)
Subgenus Helix (Pileolus) Lesson, 1831 (unaccepted, Invalid: junior homonym of Pileolus G.B. Sowerby I, 1823)
Subgenus Helix (Pitys) Mörch, 1852 (unaccepted)
  » Species Helix (Pitys) architectonica Legrand, 1871 accepted as Archiropa architectonica (Legrand, 1871) (original combination)
  » Species Helix (Pitys) assimilis Legrand, 1871 accepted as Diemenoropa kingstonensis (Legrand, 1871) (junior synonym)
  » Species Helix (Pitys) gunnii Brazier, 1877 accepted as Diemenoropa kingstonensis (Legrand, 1871) (invalid: unnecessary replacement name for Helix assimilis Legrand, 1871)
  » Species Helix (Pitys) petterdi Legrand, 1871 accepted as Exquisitiropa agnewi (Legrand, 1871) (junior synonym)
Subgenus Helix (Planispira) Beck, 1837 (unaccepted, original rank)
Subgenus Helix (Platystoma) Ancey, 1882 (unaccepted, invalid: junior homonym of Platystoma Meigen, 1803 [Diptera] and others; Saissetia and Platyrhytida are replacement names)
Subgenus Helix (Plectopylis) Benson, 1860 (unaccepted, original rank)
  » Species Helix (Plectopylis) andersoni W. Blanford, 1869 accepted as Hunyadiscus andersoni (W. Blanford, 1869) (basionym)
  » Species Helix (Plectopylis) brachyplecta Benson, 1863 accepted as Chersaecia brachyplecta (Benson, 1863) (original combination)
  » Species Helix (Plectopylis) brahma Godwin-Austen, 1879 accepted as Endothyrella brahma (Godwin-Austen, 1879) (basionym)
  » Species Helix (Plectopylis) feddeni Blanford, 1865 accepted as Chersaecia feddeni (Blanford, 1865) (original combination)
  » Species Helix (Plectopylis) francoisi H. Fischer, 1899 accepted as Plectopylis francoisi H. Fischer, 1899 accepted as Gudeodiscus francoisi (H. Fischer, 1899) (entry in volume index, p. 346)
  » Species Helix (Plectopylis) fultoni Godwin-Austen, 1892 accepted as Endothyrella fultoni (Godwin-Austen, 1892) (basionym)
  » Species Helix (Plectopylis) karenorum W. Blanford, 1865 accepted as Plectopylis karenorum (W. Blanford, 1865) (original combination)
  » Species Helix (Plectopylis) leiophis Benson, 1860 accepted as Chersaecia leiophis (Benson, 1860) (basionym)
  » Species Helix (Plectopylis) macromphalus W. Blanford, 1870 accepted as Endothyrella macromphalus (W. Blanford, 1870) (basionym)
  » Species Helix (Plectopylis) minor Godwin-Austen, 1879 accepted as Endothyrella minor (Godwin-Austen, 1879)
  » Species Helix (Plectopylis) nagaensis Godwin-Austen, 1875 accepted as Chersaecia nagaensis nagaensis (Gude, 1897) (original combination)
  » Species Helix (Plectopylis) oglei Godwin-Austen, 1879 accepted as Endothyrella oglei (Godwin-Austen, 1879) (basionym)
  » Species Helix (Plectopylis) perarcta Blanford, 1865 accepted as Chersaecia perarcta perarcta (Blanford, 1865) (original combination)
  » Species Helix (Plectopylis) ponsonbyi Godwin-Austen, 1888 accepted as Chersaecia feddeni (Blanford, 1865) (junior synonym)
  » Species Helix (Plectopylis) refuga (Gould, 1846) accepted as Chersaecia refuga Gould, 1846 (original combination)
  » Species Helix (Plectopylis) schlumbergeri Morlet, 1886 accepted as Halongella schlumbergeri (Morlet, 1886) (basionym)
  » Species Helix (Plectopylis) serica Godwin-Austen, 1875 accepted as Endothyrella serica (Godwin-Austen, 1875) (basionym)
  » Species Helix (Plectopylis) shiroiensis Godwin-Austen, 1875 accepted as Chersaecia shiroiensis shiroiensis (Godwin-Austen, 1875) (original combination)
  » Species Helix (Plectopylis) trilamellaris Godwin-Austen, 1875 accepted as Chersaecia shanensis (Stoliczka, 1873) (junior synonym)
Subgenus Helix (Plectotropis) Martens, 1860 (unaccepted)
  » Species Helix (Plectotropis) albocrenata Bavay & Dautzenberg, 1909 accepted as Helix (Plectotropis) albocrenatus Bavay & Dautzenberg, 1909 accepted as Plectotropis albocrenatus (Bavay & Dautzenberg, 1909) (specific epithet is not in agreement with generic name)
  » Species Helix (Plectotropis) albocrenatus Bavay & Dautzenberg, 1909 accepted as Plectotropis albocrenatus (Bavay & Dautzenberg, 1909) (original combination)
  » Species Helix (Plectotropis) armstrongi E. A. Smith, 1895 accepted as Planispira armstrongi (E. A. Smith, 1895) (original combination)
  » Species Helix (Plectotropis) bonnieri H. Fischer, 1898 accepted as Plectotropis bonnieri (H. Fischer, 1898) (original combination)
  » Species Helix (Plectotropis) chaudroni Bavay & Dautzenberg, 1909 accepted as Plectotropis chaudroni (Bavay & Dautzenberg, 1909) (original combination)
  » Species Helix (Plectotropis) conella A. Adams, 1868 accepted as Aegista (Plectotropis) conella (A. Adams, 1868) accepted as Plectotropis conella (A. Adams, 1868) (original combination)
  » Species Helix (Plectotropis) couturieri Bavay & Dautzenberg, 1909 accepted as Plectotropis couturieri (Bavay & Dautzenberg, 1909) (original combination)
  » Species Helix (Plectotropis) dasytricha Bavay & Dautzenberg, 1909 accepted as Plectotropis dasytricha (Bavay & Dautzenberg, 1909) (original combination)
  » Species Helix (Plectotropis) fulvicans H. Adams, 1866 accepted as Aegista fulvicans (H. Adams, 1866) (original combination)
  » Species Helix (Plectotropis) gitaena Bavay & Dautzenberg, 1909 accepted as Aegista gitaena (Bavay & Dautzenberg, 1908) (original combination)
  » Species Helix (Plectotropis) howardi Angas, 1869 accepted as Contramelon howardi (Angas, 1869) (original combination)
  » Species Helix (Plectotropis) hyperteleia Morlet, 1892 accepted as Plectotropis hyperteleia (Morlet, 1892) accepted as Ganesella hyperteleia (Morlet, 1892) (original combination)
  » Species Helix (Plectotropis) mariella H. Adams, 1870 accepted as Platypetasus mariella (H. Adams, 1870) (basionym)
  » Species Helix (Plectotropis) pseudotrochula Bavay & Dautzenberg, 1909 accepted as Plectotropis pseudotrochula (Bavay & Dautzenberg, 1909) accepted as Aegista pseudotrochula (Bavay & Dautzenberg, 1909) (original combination)
  » Species Helix (Plectotropis) scabricula A. Adams, 1868 accepted as Plectotropis scabricula (A. Adams, 1868) (original combination)
  » Species Helix (Plectotropis) setocincta A. Adams, 1868 accepted as Aegista (Plectotropis) setocincta (A. Adams, 1868) accepted as Plectotropis setocincta (A. Adams, 1868) (original combination)
  » Species Helix (Plectotropis) shermani L. Pfeiffer, 1865 accepted as Aegista shermani (L. Pfeiffer, 1865) (unaccepted combination)
  » Species Helix (Plectotropis) subinflexa Mabille, 1889 accepted as Aegista subinflexa (Mabille, 1889) (unaccepted combination)
  » Species Helix (Plectotropis) trochula A. Adams, 1868 accepted as Neoaegista trochula (A. Adams, 1868) (original combination)
  » Species Helix (Plectotropis) xydaea Bavay & Dautzenberg, 1909 accepted as Plectotropis xydaea (Bavay & Dautzenberg, 1909) (original combination)
Subgenus Helix (Poecilostola) Ancey, 1886 (unaccepted, invalid: junior homonym of Poecilostola Schiner, 1863 [Diptera]; Pilsbrya is a replacement name)
Subgenus Helix (Polygyra) Say, 1818 (unaccepted)
  » Species Helix (Polygyra) couchiana I. Lea, 1857 accepted as Linisa ariadnae (L. Pfeiffer, 1848)
  » Species Helix (Polygyra) deltoidea Simpson, 1888 accepted as Daedalochila deltoidea (Simpson, 1888)
  » Species Helix (Polygyra) implicata Martens, 1865 accepted as Linisa implicata (E. von Martens, 1865)
  » Species Helix (Polygyra) microdiscus Bavay, 1908 accepted as Stenopylis coarctata (Moellendorff, 1894) (junior synonym)
  » Species Helix (Polygyra) mooreana W. G. Binney, 1857 accepted as Daedalochila mooreana (W.G. Binney, 1857)
  » Species Helix (Polygyra) oppilata Morelet, 1849 accepted as Linisa oppilata (Morelet, 1849)
  » Species Helix (Polygyra) planorbiformis Sacco, 1886 † accepted as Protodrepanostoma planorbiforme (Sacco, 1886) †
  » Species Helix (Polygyra) plioauriculata Sacco, 1889 † accepted as Protodrepanostoma plioauriculatum (Sacco, 1889) † (new combination)
  » Species Helix (Polygyra) tamaulipasensis I. Lea, 1857 accepted as Linisa tamaulipasensis (I. Lea, 1857)
  » Species Helix (Polygyra) tholus W. G. Binney, 1857 accepted as Daedalochila mooreana (W.G. Binney, 1857)
  » Species Helix (Polygyra) auriculata (uncertain)
Subgenus Helix (Polymita) H. Beck, 1837 (unaccepted, original rank)
Subgenus Helix (Pomatia) H. Beck, 1837 (unaccepted, Invalid: junior homonym of Pomatia Röding, 1798; and junior objective synonym of Helix)
Subgenus Helix (Prothelidomus) Oppenheim, 1890 † (unaccepted)
Subgenus Helix (Pseudobuliminus) Gredler, 1886 (unaccepted, original rank)
Subgenus Helix (Pseudotachea) C.R. Boettger, 1909 (unaccepted)
Subgenus Helix (Pyramidula) Fitzinger, 1833 (unaccepted)
Subgenus Helix (Rhagada) Albers, 1860 (unaccepted)
  » Species Helix (Rhagada) bordaensis Angas, 1880 accepted as Glyptorhagada bordaensis (Angas, 1880) (original combination)
  » Species Helix (Rhagada) floresiana Martens, 1891 accepted as Rhagada floresiana (Martens, 1891) (original combination)
  » Species Helix (Rhagada) inconvicta E. A. Smith, 1894 accepted as Westraltrachia oscarensis (Cox, 1892) (junior synonym)
  » Species Helix (Rhagada) kooringensis Angas, 1877 accepted as Glyptorhagada kooringensis (Angas, 1877) (original combination)
  » Species Helix (Rhagada) silveri Angas, 1868 accepted as Glyptorhagada silveri (Angas, 1868) (original combination)
Subgenus Helix (Rhytida) Albers, 1860 (unaccepted, original rank)
  » Species Helix (Rhytida) balli Brazier, 1889 accepted as Pseudocharopa ledgbirdi (Brazier, 1889) (junior synonym)
  » Species Helix (Rhytida) beddomei Brazier, 1876 accepted as Murphitella franklandiensis (Forbes, 1852) (junior synonym)
  » Species Helix (Rhytida) hobsoni Brazier, 1876 accepted as Macrodelos hobsoni (Brazier, 1876) (original combination)
  » Species Helix (Rhytida) jamesi Brazier, 1876 accepted as Murphitella franklandiensis (Forbes, 1852) (junior synonym)
  » Species Helix (Rhytida) langleyana Brazier, 1875 accepted as Stenacapha hamiltoni (Cox, 1868) (junior synonym)
  » Species Helix (Rhytida) ledgbirdi Brazier, 1889 accepted as Pseudocharopa ledgbirdi (Brazier, 1889) (original combination)
  » Species Helix (Rhytida) sheridani Brazier, 1875 accepted as Limesta sheridani (Brazier, 1875) (original combination)
  » Species Helix (Rhytida) whiteleggei Brazier, 1889 accepted as Pseudocharopa whiteleggei (Brazier, 1889) (original combination)
Subgenus Helix (Rhytidopsis) Ancey, 1882 (unaccepted, original rank)
Subgenus Helix (Rotula) Albers, 1850 (unaccepted, invalid: junior homonym of Rotula Schumacher, 1817 [Echinodermata]; Cycliscus and Harmogenanina are replacement names)
Subgenus Helix (Sagda) Beck, 1837 (unaccepted, original rank)
Subgenus Helix (Sagdellina) Cossmann, 1889 † (unaccepted)
Subgenus Helix (Satsuma) A. Adams, 1868 (unaccepted, original rank)
  » Species Helix (Satsuma) albida H. Adams, 1870 accepted as Satsuma albida (H. Adams, 1870) (original combination)
Subgenus Helix (Sculptaria) L. Pfeiffer, 1855 (unaccepted, distinct genus)
Subgenus Helix (Sesara) Albers, 1860 (unaccepted, original rank)
Subgenus Helix (Sivella) W.T. Blanford, 1863 (unaccepted)
Subgenus Helix (Solaropsis) Beck, 1837 (unaccepted, original rank)
Subgenus Helix (Sophina) W. H. Benson, 1859 (unaccepted, original rank)
Subgenus Helix (Stenotrema) Rafinesque, 1819 (unaccepted)
Subgenus Helix (Sterna) Albers, 1850 (unaccepted, Invalid: junior homonym of Sterna Linnaeus, 1758 [Aves])
Subgenus Helix (Streptaxis) Gray, 1837 (unaccepted, original combination)
Subgenus Helix (Systenostoma) Bavay & Dautzenberg, 1909 (unaccepted, original rank)
Subgenus Helix (Tachea) W. Turton, 1831 (unaccepted, Invalid: junior homonym of Tachea Fleming, 1822 [Aves])
Subgenus Helix (Tacheocampylaea) L. Pfeiffer, 1877 (unaccepted, original rank)
Subgenus Helix (Thalassia) Martens, 1860 (unaccepted, Invalid: junior homonym of Thalassia Dejean, 1835 [Coleoptera] and Thalassia Bonaparte, 1856 [Aves])
Subgenus Helix (Thea) Albers, 1850 (unaccepted, Invalid: junior homonym of Thea Mulsant, 1846 [Coleoptera]; Plectotropis is a replacement name)
Subgenus Helix (Theba) Risso, 1826 (unaccepted)
  » Species Helix (Theba) caucasicola Lindholm, 1913 accepted as Kokotschashvilia caucasicola (Lindholm, 1913) accepted as Dioscuria caucasicola (Lindholm, 1913) (original combination)
  » Species Helix (Theba) selecta Klika, 1894 accepted as Stenomphalia selecta (Klika, 1894) (original combination, replacement name for Helix globula Kaleniczenko, 1853 non Helix globula Lea, 1837)
  » Species Helix (Theba) subcarthusiana Lindholm, 1913 accepted as Monacha subcarthusiana (Lindholm, 1913)
  » Species Helix (Theba) tschorochensis Lindholm, 1913 accepted as Stenomphalia selecta (Klika, 1894) (a junior synonym)
Subgenus Helix (Trachia) E. von Martens, 1860 (unaccepted, original combination)
  » Species Helix (Trachia) bathurstensis E.A. Smith, 1894 accepted as Torresitrachia bathurstensis (E. A. Smith, 1894) (original combination)
  » Species Helix (Trachia) catostoma Blanford, 1869 accepted as Aegista catostoma (Blanford, 1869) (original combination)
  » Species Helix (Trachia) derbyana E. A. Smith, 1894 accepted as Westraltrachia derbyi (Cox, 1892) (junior synonym)
  » Species Helix (Trachia) endeavourensis Brazier, 1872 accepted as Torresitrachia torresiana (Hombron & Jacquinot, 1841) (junior synonym)
  » Species Helix (Trachia) gascoynensis E. A. Smith, 1894 accepted as Plectorhagada gascoynensis (E. A. Smith, 1894) (original combination)
  » Species Helix (Trachia) ihliana Babor, 1897 † accepted as Pseudochloritis robusta (Reuss in Reuss & Meyer, 1849) † accepted as Papillotopsis robusta (Reuss in Reuss & Meyer, 1849) † (junior synonym)
  » Species Helix (Trachia) malayana Möllendorff, 1887 accepted as Trichochloritis breviseta (L. Pfeiffer, 1862) (junior synonym)
Subgenus Helix (Trachycystis) Pilsbry, 1893 (unaccepted)
Subgenus Helix (Trichia) Hartmann, 1840 (unaccepted, Invalid: junior homonym of Trichia De Haan, 1839 [Crustacea].)
Subgenus Helix (Trichochloritis) Pilsbry, 1891 (unaccepted)
Subgenus Helix (Trigonostoma) Fitzinger, 1833 (unaccepted, Invalid: Junior homonym of Trigonostoma Blainville, 1825 [Cancellariidae]; also a junior objective synonym of Helicodonta)
Subgenus Helix (Triodopsis) Rafinesque, 1819 (unaccepted)
Subgenus Helix (Trochomorpha) Albers, 1850 (unaccepted, original rank)
Subgenus Helix (Trochonanina) Mousson, 1869 (unaccepted, superseded combination)
Subgenus Helix (Trochozonites) Pfeffer, 1883 (unaccepted, distinct genus)
Subgenus Helix (Turricula) Beck, 1837 (unaccepted, Invalid: junior homonym of Turricula Schumacher, 1817 [Turridae])
Subgenus Helix (Ulostoma) Albers, 1850 (unaccepted, objective junior synonym)
Subgenus Helix (Vallonia) Risso, 1826 (unaccepted)
  » Species Helix (Vallonia) brochoni Degrange-Touzin, 1892 † accepted as Vallonia brochoni (Degrange-Touzin, 1892) †
  » Species Helix (Vallonia) brochoni Degrange-Touzin, 1893 accepted as Vallonia costata (O. F. Müller, 1774)
  » Species Helix (Vallonia) costata (O. F. Müller, 1774) accepted as Vallonia costata (O. F. Müller, 1774)
  » Species Helix (Vallonia) costellata Sandberger, 1875 accepted as Vallonia costata (O. F. Müller, 1774)
  » Species Helix (Vallonia) girauxae Cossmann, 1902 † accepted as Vallonia girauxae (Cossmann, 1902) †
  » Species Helix (Vallonia) ladacensis Nevill, 1878 accepted as Vallonia ladacensis (Nevill, 1878) (original combination)
  » Species Helix (Vallonia) subcostata Clessin, 1912 † accepted as Vallonia subcyclophorella (Gottschick, 1911) † (junior synonym)
  » Species Helix (Vallonia) subcyclophorella Gottschick, 1911 † accepted as Vallonia subcyclophorella (Gottschick, 1911) †
  » Species Helix (Vallonia) subpulchella F. Sandberger, 1872 † accepted as Vallonia lepida (Reuss in Reuss & Meyer, 1849) † (junior synonym)
Subgenus Helix (Videna) H. Adams & A. Adams, 1855 (unaccepted)
  » Species Helix (Videna) bonneti Cossmann, 1902 † accepted as Discus bonneti (Cossmann, 1902) † (new combination)
  » Species Helix (Videna) ducani Legrand, 1871 accepted as Stenacapha hamiltoni (Cox, 1868) (junior synonym)
  » Species Helix (Videna) floodi Legrand, 1871 accepted as Stenacapha hamiltoni (Cox, 1868) (junior synonym)
  » Species Helix (Videna) kingi Brazier, 1871 accepted as Stenacapha hamiltoni (Cox, 1868) (junior synonym)
  » Species Helix (Videna) margaritae Cossmann, 1902 † accepted as Discus margaritae (Cossmann, 1902) † (new combination)
  » Species Helix (Videna) milligani Legrand, 1871 accepted as Stenacapha hamiltoni (Cox, 1868) (junior synonym)
  » Species Helix (Videna) pascoei Legrand, 1871 accepted as Stenacapha hamiltoni (Cox, 1868) (junior synonym)
  » Species Helix (Videna) quaestiosa Legrand, 1871 accepted as Tasmaphena sinclairi (L. Pfeiffer, 1845) (junior synonym)
  » Species Helix (Videna) ruga Legrand, 1871 accepted as Tasmaphena ruga (Legrand, 1871) (original combination)
Subgenus Helix (Vortex) Beck, 1837 (unaccepted, Invalid: junior objective synonym of Helicodonta )
Subgenus Helix (Xanthomelon) Martens, 1860 (unaccepted)
Subgenus Helix (Xerophila) Held, 1838 (unaccepted)
Subgenus Helix (Xesta) Albers, 1850 (unaccepted)
Subgenus Helix (Zenobia) Gray, 1821 (unaccepted, subjective senior synonym of Monacha Fitzinger, 1833)
Subgenus Helix (Zonites) Montfort, 1810 (unaccepted, considered a separate genus)
Species Helix abax Marie, 1870 (unaccepted, original combination)
Species Helix aberrata Souleyet, 1852 (unaccepted, original combination)
Species Helix abjecta R. T. Lowe, 1831 (unaccepted)
Species Helix abjecta Gould, 1848 (unaccepted)
Species Helix abrettensis Fontannes, 1876 † (unaccepted, new combination)
Species Helix abrochroa Crosse, 1868 (unaccepted, original combination)
Species Helix abyssorum d'Orbigny, 1835 (unaccepted, original combination)
Species Helix acalles Pfeiffer, 1857 (unaccepted, original combination)
Species Helix acanthinula Crosse, 1868 (unaccepted, original combination)
Species Helix acerra Lewis, 1871 (unaccepted)
Species Helix acetabulum Pease, 1861 (unaccepted, junior synonym)
Species Helix achates Rossmässler, 1835 (unaccepted, original combination)
Species Helix achatina L. Pfeiffer, 1845 (unaccepted, synonym)
Species Helix acmella L. Pfeiffer, 1860 (unaccepted, junior synonym)
Species Helix acris Benson, 1859 (unaccepted, original combination)
Species Helix actinophora R. T. Lowe, 1831 (unaccepted, original combination)
Species Helix acuducta Benson, 1850 (unaccepted, original combination)
Species Helix acuta O. F. Müller, 1774 (unaccepted, original combination)
Species Helix acuta Lamarck, 1816 (unaccepted, invalid: junior homonym of Helix acuta O.F. Müller, 1774)
Species Helix adamnis Dall, 1890 † (unaccepted, new combination)
Species Helix adansoniae Morelet, 1848 (unaccepted, original combination)
Species Helix adolfi L. Pfeiffer, 1854 (unaccepted, original combination)
Species Helix adornata Noulet, 1867 † (unaccepted, new combination)
Species Helix advena Rossmässler, 1842 (unaccepted, junior synonym)
Species Helix aecouria Letourneux & Bourguignat, 1887 (unaccepted, junior synonym)
Species Helix aemula L. Pfeiffer, 1852 (unaccepted, junior synonym)
Species Helix aenea F. Krauss, 1848 (unaccepted, original combination)
Species Helix aenigma Dohrn, 1875 (unaccepted, original combination)
Species Helix aequatoria L. Pfeiffer, 1860 (unaccepted, original combination)
Species Helix aequatoriana Hidalgo, 1867 (unaccepted, original combination)
Species Helix aeruginosa Gould, 1855 (unaccepted)
Species Helix aesopus Angas, 1878 (unaccepted, junior synonym)
Species Helix afra Gmelin, 1791 (unaccepted, synonym)
Species Helix africae A.D. Brown, 1865 (unaccepted, original combination)
Species Helix aggerivaga Mabille, 1880 (unaccepted)
Species Helix aggiei Heimburg, 1890 (unaccepted, junior synonym)
Species Helix aigenensis Tausch, 1886 † (unaccepted, new combination)
Species Helix alauda Férussac, 1821 (unaccepted, original combination)
Species Helix albanica Rossmässler, 1836 (unaccepted, original combination)
Species Helix albicostis Pfeiffer, 1860 (unaccepted, original combination)
Species Helix albigensis Noulet, 1854 † (unaccepted, new combination)
Species Helix albizonata Dohrn, 1858 (unaccepted, original combination)
Species Helix albocincta Gould, 1851 (unaccepted, nomen nudum)
Species Helix albolabris Say, 1817 (unaccepted)
Species Helix albolineata Gould, 1857 (unaccepted, nomen nudum)
Species Helix albozonata Gould, 1857 (unaccepted)
Species Helix albumenoidea Cox, 1868 (unaccepted, original combination)
Species Helix alcarazana Rossmässler, 1854 (unaccepted, junior synonym)
Species Helix alfredi Cox, 1871 (unaccepted, original combination)
Species Helix algira Linnaeus, 1758 (unaccepted, original combination)
Species Helix algiroides Reuss in Reuss & Meyer, 1849 † (unaccepted, new combination)
Species Helix allasteri Cox, 1873 (unaccepted, junior synonym)
Species Helix allecta Cox, 1870 (unaccepted, original combination)
Species Helix alliaria J. S. Miller, 1822 (unaccepted)
Species Helix alloiodes Thomä, 1845 † (unaccepted, new combination)
Species Helix alonensis A. Férussac, 1821 (unaccepted, original combination)
Species Helix alpestris Rossmässler, 1837 (unaccepted, junior synonym)
Species Helix alpha L. Pfeiffer, 1853 (unaccepted)
Species Helix alphonsi Deshayes, 1870 (unaccepted, original combination)
Species Helix alta Pease, 1868 (unaccepted, junior synonym)
Species Helix alternata Say, 1817 (unaccepted)
Species Helix alveolus Gassies, 1881 (unaccepted, original combination)
Species Helix alveus Sandberger, 1875 † (unaccepted, new combination)
Species Helix amanda Rossmässler, 1838 (unaccepted, original combination)
Species Helix amarula Linnaeus, 1758 (unaccepted, original combination)
Species Helix amberti Michaud, 1855 † (unaccepted, new combination)
Species Helix ambigua Linnaeus, 1758 (unaccepted, original combination)
Species Helix amblytropis F. Sandberger, 1872 † (unaccepted, new combination)
Species Helix amictella Mabille, 1889 (unaccepted, synonym)
Species Helix amphibulima Férussac, 1839 (unaccepted, original combination)
Species Helix amphicora Mabille, 1888 (unaccepted, original combination)
Species Helix ampulla Benson, 1850 (unaccepted, original combination)
Species Helix ampullacea Linnaeus, 1758 (unaccepted, original combination)
Species Helix amurensis Gerstfeldt, 1859 (unaccepted)
Species Helix anachoreta W. G. Binney, 1857 (unaccepted)
Species Helix anax Benson, 1865 (unaccepted, original combination)
Species Helix anconostoma Lowe, 1831 (unaccepted)
Species Helix andersoni Cox, 1872 (unaccepted, invalid: junior homonym of Helix andersoni Blanford, 1869; F. volgiola is a replacement name)
Species Helix andersoni W. Blanford, 1869 (unaccepted, original combination)
Species Helix andromache L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix angasiana Newcomb, 1862 (unaccepted, junior synonym)
Species Helix angasiana L. Pfeiffer, 1862 (unaccepted, invalid: junior homonym of Helix angasiana Newcomb, 1852; Sinumelon godfreyi is a replacement name)
Species Helix angistoma Férussac, 1821 (unaccepted)
Species Helix anguiculus Reeve, 1852 (unaccepted)
Species Helix anguina Gould, 1847 (unaccepted, original combination)
Species Helix angulata Rackett, 1821 (unaccepted)
Species Helix annae Lewis, 1871 (unaccepted, nomen nudum)
Species Helix annatonensis L. Pfeiffer, 1854 (unaccepted, original combination)
Species Helix annulata Case, 1847 (unaccepted)
Species Helix annulifera Reeve, 1852 (unaccepted, junior synonym)
Species Helix annulifera L. Pfeiffer, 1853 (unaccepted, junior homonym and synonym of Helix annulifera Reeve, 1852)
Species Helix antelata Cox, 1870 (unaccepted, junior synonym)
Species Helix anthracophila Stache in F. Sandberger, 1871 † (unaccepted, new combination)
Species Helix antialba Petterd, 1879 (unaccepted)
Species Helix antipoda Hombron & Jacquinot, 1841 (unaccepted)
Species Helix antrorsa L. Pfeiffer, 1855 (unaccepted, original combination)
Species Helix aorangi Suter, 1890 (unaccepted)
Species Helix aperta Born, 1778 (unaccepted, original combination)
Species Helix aphrodite Pfeiffer, 1859 (unaccepted, original combination)
Species Helix apia Hombron & Jacquinot, 1852 (unaccepted, original combination)
Species Helix apiculus L. Pfeiffer, 1849 (unaccepted, junior synonym)
Species Helix apollo L. Pfeiffer, 1860 (unaccepted, original combination)
Species Helix appendiculata Reeve, 1854 (unaccepted, original combination)
Species Helix aprica F. Krauss, 1848 (unaccepted, original combination)
Species Helix arachne Morelet, 1877 (unaccepted, original combination)
Species Helix aranea L. Pfeiffer, 1871 (unaccepted, junior synonym)
Species Helix arborea Say, 1817 (unaccepted, original combination)
Species Helix arboretorum Valenciennes, 1846 (unaccepted)
Species Helix arboreus Say, 1817 (unaccepted, original combination, incorrect gender ending)
Species Helix arbusticola Deshayes, 1870 (unaccepted, original combination)
Species Helix arbustorum Linnaeus, 1758 (unaccepted)
Species Helix arcadica L. Pfeiffer, 1853 (unaccepted, original combination)
Species Helix ardua Cox, 1870 (unaccepted, junior synonym)
Species Helix arenicola Tate, 1878 (unaccepted, junior synonym)
Species Helix arenosa Krynicki, 1836 (unaccepted, original combination)
Species Helix argentina Holmberg, 1909 (unaccepted, original combination)
Species Helix argilacea Férussac, 1821 (unaccepted)
Species Helix arguta Pfeiffer, 1856 (unaccepted, junior synonym)
Species Helix ariadnae L. Pfeiffer, 1848 (unaccepted)
Species Helix aridorum Cox, 1866 (unaccepted, original combination)
Species Helix armoricensis Cossmann, 1902 † (unaccepted, new combination)
Species Helix arneggensis F. Sandberger, 1875 † (unaccepted, new combination)
Species Helix arnoldii Thomä, 1845 † (unaccepted, new combination)
Species Helix arnotti Benson, 1864 (unaccepted, original combination)
Species Helix arnoudii Michaud, 1837 † (unaccepted, new combination)
Species Helix arrosa W. G. Binney, 1858 (unaccepted, replacement name)
Species Helix artensis Souverbie, 1859 (unaccepted, original combination)
Species Helix aspera Férussac, 1821 (unaccepted, invalid: junior homonym of Helix aspera Gmelin, 1791; no replacement name available)
Species Helix aspera Gmelin, 1791 (unaccepted, junior synonym)
Species Helix asperella L. Pfeiffer, 1846 (unaccepted, original combination)
Species Helix aspersa O.F. Müller, 1774 (unaccepted, original combination)
Species Helix asperula Deshayes, 1832 † (unaccepted, synonym)
Species Helix aspirans W. T. Blanford & H. F. Blanford, 1861 (unaccepted, original combination)
Species Helix assimilans Cox, 1864 (unaccepted, original combination)
Species Helix assimilaris Gredler, 1878 (unaccepted, original combination and rank)
Species Helix associata Rossmässler, 1835 (unaccepted, junior synonym)
Species Helix asteriscus Morse, 1857 (unaccepted)
Species Helix asthena Bourguignat, 1881 † (unaccepted, new combination)
Species Helix astur Souverbie, 1860 (unaccepted, original combination)
Species Helix atlantica Morelet & Drouët, 1857 (unaccepted, original combination)
Species Helix atrata Pfeiffer, 1854 (unaccepted, invalid: junior homonym of Helix atrata Reeve, 1852; Isomeria jacksoni Solem, 1966 is a replacment name)
Species Helix atrata Reeve, 1852 (unaccepted, junior synonym)
Species Helix atrofusca L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix atrolabiata Krynicki, 1833 (unaccepted, original combination)
Species Helix atropos Férussac, 1840 (unaccepted, original combination)
Species Helix attonis Pfeiffer, 1840 (unaccepted)
Species Helix aucklandica Le Guillou, 1842 (unaccepted)
Species Helix audouini d'Orbigny, 1835 (unaccepted, original combination)
Species Helix aulacophora Ancey, 1890 (unaccepted, original combination)
Species Helix aulacospira L. Pfeiffer, 1846 (unaccepted, original combination)
Species Helix auricularia Linnaeus, 1758 (unaccepted, original combination)
Species Helix auriculina Petit, 1840 (unaccepted, junior synonym)
Species Helix auriformis Bland, 1859 (unaccepted)
Species Helix auriscaprina Férussac, 1821 (unaccepted, junior synonymy)
Species Helix aurismalchi O. F. Müller, 1774 (unaccepted, name suppressed by ICZN Opinion 1662)
Species Helix aurismuris S. Moricand, 1839 (unaccepted, original combination)
Species Helix aurora L. Pfeiffer, 1863 (unaccepted, original combination)
Species Helix australis Férussac, 1821 (unaccepted, original combination)
Species Helix austriaca Menke, 1828 (unaccepted)
Species Helix ayresiana Newcomb, 1861 (unaccepted)
Species Helix aziospudasta Filhol, 1877 † (unaccepted, new combination)
Species Helix babel Beck, 1837 (unaccepted, junior synonym)
Species Helix bacca L. Pfeiffer, 1866 (unaccepted, original combination)
Species Helix bactriana Hutton, 1849 (unaccepted, original combination)
Species Helix baeri Dautzenberg, 1902 (unaccepted, original name)
Species Helix baetica Rossmässler, 1854 (unaccepted, original combination)
Species Helix bailloni Kobelt, 1888 (unaccepted, original combination)
Species Helix bajadera Pfeiffer, 1850 (unaccepted, original combination)
Species Helix baladensis Souverbie, 1863 (unaccepted, original combination)
Species Helix balansai Morlet, 1886 (unaccepted, original combination)
Species Helix balcanica L. Pfeiffer, 1853 (unaccepted, original combination)
Species Helix balearica Rossmässler, 1838 (unaccepted, original combination)
Species Helix balesteriana Lea, 1841 (unaccepted, junior synonym)
Species Helix balmei Potiez & Michaud, 1838 (unaccepted, original combination)
Species Helix balstoni Angas, 1877 (unaccepted, original combination)
Species Helix balthica Linnaeus, 1758 (unaccepted, original combination)
Species Helix banatica Rossmässler, 1838 (unaccepted, original combination)
Species Helix banneri Pfeiffer, 1863 (unaccepted, original combination)
Species Helix bantamensis E. A. Smith 1887 (unaccepted)
Species Helix baphica Mabille, 1888 (unaccepted, original combination)
Species Helix barbara Linnaeus, 1758 (unaccepted)
Species Helix barbatula Reeve, 1852 (unaccepted)
Species Helix barbigera Redfield, 1856 (unaccepted)
Species Helix barbula Rossmässler, 1838 (unaccepted, original combination)
Species Helix barnaclei E. A. Smith, 1877 (unaccepted, junior synonym)
Species Helix barrakporensis L. Pfeiffer, 1853 (unaccepted, original combination)
Species Helix barrenensis Petterd, 1879 (unaccepted, original combination)
Species Helix barreri Bourguignat, 1881 † (unaccepted, new combination)
Species Helix basalis Pilsbry, 1890 (unaccepted, Invalid: junior homonym of Helix basalis Schmeltz, 1869)
Species Helix bascauda Benson, 1859 (unaccepted, original combination)
Species Helix basidens Mousson, 1873 (unaccepted, original combination)
Species Helix basilessa Benson, 1865 (unaccepted, original combination)
Species Helix basileus Benson, 1861 (unaccepted, original combination)
Species Helix baskervillei L. Pfeiffer, 1850 (unaccepted)
Species Helix bataviana von dem Busch, 1842 (unaccepted, original combination)
Species Helix bathmophora Mabille, 1887 (unaccepted, synonym)
Species Helix bathmophorella Mabille, 1889 (unaccepted, synonym)
Species Helix bathyomphala L. Pfeiffer, 1848 (unaccepted, junior synonym)
Species Helix bavayi Crosse & Marie, 1868 (unaccepted, original combination)
Species Helix bazini Crosse, 1874 (unaccepted, original combination)
Species Helix beatrix Angas, 1876 (unaccepted, junior synonym)
Species Helix beaumontii Matheron, 1843 † (unaccepted, junior synonym)
Species Helix beddomae Brazier, 1878 (unaccepted, junior synonym)
Species Helix belangeri Deshayes, 1832 (unaccepted)
Species Helix bellendenkerensis Brazier, 1875 (unaccepted, original combination)
Species Helix bellengenensis Brazier, 1871 (unaccepted, junior synonym)
Species Helix bellengerensis Cox, 1871 (unaccepted, original combination)
Species Helix belli Cox, 1864 (unaccepted, original combination)
Species Helix belmorei Cox, 1872 (unaccepted, original combination)
Species Helix benigna L. Pfeiffer, 1863 (unaccepted, original combination)
Species Helix bennetti Brazier, 1872 (unaccepted, original combination)
Species Helix berlierei Crosse, 1875 (unaccepted, original combination)
Species Helix bermudensis L. Pfeiffer, 1845 (unaccepted, original combination)
Species Helix bernardii Michaud, 1862 † (unaccepted, new combination)
Species Helix berthelini Deshayes, 1863 † (unaccepted)
Species Helix besckei Dunker, 1847 (unaccepted, original combination)
Species Helix beta L. Pfeiffer, 1853 (unaccepted)
Species Helix bewsheriana Morelet, 1875 † (unaccepted, original combination)
Species Helix beyrichi Deshayes, 1863 † (unaccepted, new combination)
Species Helix bianconii Deshayes, 1870 (unaccepted, junior synonym)
Species Helix bicarinata G. B. Sowerby I, 1824 (unaccepted, original combination)
Species Helix biciliata L. Pfeiffer, 1855 (unaccepted, original combination)
Species Helix biconcava L. Pfeiffer, 1853 (unaccepted)
Species Helix bicostata L. Pfeiffer, 1846 (unaccepted)
Species Helix bidenticulata Benson, 1852 (unaccepted, original combination)
Species Helix bidwilli Reeve, 1853 (unaccepted, original combination)
Species Helix biforis Heude, 1885 (unaccepted, original combination)
Species Helix bifoveata Benson, 1856 (unaccepted, original combination)
Species Helix bifurcata Reeve, 1852 (unaccepted, junior synonym)
Species Helix bifurcata Deshayes, 1838 (unaccepted, original combination)
Species Helix bigoti Crosse, 1867 (unaccepted)
Species Helix bilamellata L. Pfeiffer, 1845 (unaccepted, invalid: junior homonym of Helix bilamellata G. B. Sowerby I, 1844; Patula pagodiformis is a replacement name)
Species Helix bilirata W. T. Blanford & H. F. Blanford, 1861 (unaccepted, original combination)
Species Helix billeheusti Crosse & Fischer, 1864 (unaccepted, original combination)
Species Helix bimaensis (Mousson, 1849) (unaccepted, original combination)
Species Helix binaria L. Pfeiffer, 1856 (unaccepted, original combination)
Species Helix binaria E. von Martens, 1900 (unaccepted, junior synonym)
Species Helix binneyana Pilsbry, 1899 (unaccepted)
Species Helix binominata Tryon, 1887 (unaccepted)
Species Helix biocheana Crosse, 1870 (unaccepted, junior synonym)
Species Helix biomphala L. Pfeiffer, 1863 (unaccepted, original combination)
Species Helix bipartita Férussac, 1823 (unaccepted, original combination)
Species Helix bisculpta Benson, 1851 (unaccepted, original combination)
Species Helix bitaeniata Cox, 1868 (unaccepted, original combination)
Species Helix bituberculata L. Pfeiffer, 1853 (unaccepted, invalid: junior homonym of Helix bituberculata Reeve, 1852 and objective junior synonym of Helix bourcieri Reeve, 1852)
Species Helix bituberculata Reeve, 1852 (unaccepted, original combination)
Species Helix blackmani Cox, 1868 (unaccepted, original combination)
Species Helix blakeana Newcomb, 1865 (unaccepted, original combination)
Species Helix blakei Kobelt, 1879 (unaccepted, junior synonym)
Species Helix blanda Cox, 1873 (unaccepted, junior synonym)
Species Helix blandingiana I. Lea, 1840 (unaccepted, junior synonym)
Species Helix blomfieldi Cox, 1864 (unaccepted, original combination)
Species Helix boa Hupé, 1857 (unaccepted, invalid: unjustified emendation of )
Species Helix bocageana Crosse, 1864 (unaccepted, original combination)
Species Helix bocconiana Benoit, 1857 (unaccepted)
Species Helix boghariensis Debeaux, 1857 (unaccepted, junior synonym)
Species Helix bogotensis Reeve, 1854 (unaccepted, original combination)
Species Helix boissieri Charpentier, 1847 (unaccepted, preoccupied name)
Species Helix boivinii Petit de la Saussaye, 1841 (unaccepted, original combination)
Species Helix bolivarii d’Orbigny, 1835 (unaccepted, original combination)
Species Helix bombycina Reeve, 1854 (unaccepted, junior synonym)
Species Helix bonduelliana Bourguignat, 1863 (unaccepted, junior synonym)
Species Helix boryana Morelet, 1875 (unaccepted, junior synonym)
Species Helix botterii L. Pfeiffer, 1853 (unaccepted, original combination)
Species Helix bottinii Sacco, 1884 † (unaccepted, new combination)
Species Helix bougainvillei Pfeiffer, 1860 (unaccepted, original combination)
Species Helix bouilletii De Boissy, 1840 † (unaccepted, new combination)
Species Helix bourailensis Gassies, 1872 (unaccepted, original combination)
Species Helix bourcieri Pfeiffer, 1853 (unaccepted, invalid: junior homonym of Helix bourcieri Reeve, 1852 and objective junior synonym of Helix bituberculata Reeve, 1852)
Species Helix bourcieri Reeve, 1852 (unaccepted, original combination)
Species Helix bouyei Crosse & Fischer, 1863 (unaccepted, original combination)
Species Helix boyerii Fischer & Bernardi, 1857 (unaccepted, original combination)
Species Helix brachysoma d’Orbigny, 1835 (unaccepted, original combination)
Species Helix braunii Thomä, 1845 † (unaccepted, new combination)
Species Helix brazieri Cox, 1868 (unaccepted, original combination)
Species Helix brenchleyi Angas, 1879 (unaccepted, invalid: junior homonym of Helix brenchleyi Brazier, 1875)
Species Helix brevibarbis Pfeiffer, 1859 (unaccepted, original combination)
Species Helix brevidens G. B. Sowerby I, 1841 (unaccepted, original combination)
Species Helix brevipes Draparnaud, 1805 (unaccepted, original combination)
Species Helix brevipila L. Pfeiffer, 1849 (unaccepted, original combination)
Species Helix breviseta L. Pfeiffer, 1862 (unaccepted, original combination)
Species Helix breweri Newcomb, 1864 (unaccepted)
Species Helix bridgesii Newcomb, 1861 (unaccepted)
Species Helix broadbenti Brazier, 1877 (unaccepted, original combination)
Species Helix brocchii F. Sandberger, 1872 † (unaccepted, junior synonym)
Species Helix brodiei Brazier, 1872 (unaccepted, original combination)
Species Helix brookei A. Adams & Reeve, 1848 (unaccepted, original combination)
Species Helix broughami Angas, 1875 (unaccepted, original combination)
Species Helix browningii Benson, 1864 (unaccepted, synonym)
Species Helix bruneri Ancey, 1881 (unaccepted)
Species Helix brunonia Johnston, 1888 (unaccepted, junior synonym)
Species Helix brunonis Kobelt, 1894 (unaccepted, original combination)
Species Helix buccenlenta Gould, 1848 (unaccepted)
Species Helix buccinella Reeve, 1852 (unaccepted)
Species Helix buffoniana L. Pfeiffer, 1845 (unaccepted, original combination)
Species Helix bulbulus F. Sandberger, 1873 † (unaccepted, new combination)
Species Helix buliminus Heude, 1882 (unaccepted, original combination)
Species Helix bullacea Reeve, 1854 (unaccepted, original combination)
Species Helix bursatella Gould, 1846 (unaccepted, original combination)
Species Helix burtini Deshayes, 1873 (unaccepted, original combination)
Species Helix busbyii Gray, 1840 (unaccepted)
Species Helix buttoni Petterd, 1879 (unaccepted, junior synonym)
Species Helix butumbiana Martens, 1895 (unaccepted, original combination)
Species Helix cabriti Gassies, 1863 (unaccepted, original combination)
Species Helix cacuminifera Benson, 1850 (unaccepted, original combination)
Species Helix cadurcensis Noulet, 1854 † (unaccepted, synonym)
Species Helix caeca Guppy, 1868 (unaccepted, synonym)
Species Helix caerulescens Gmelin, 1791 † (unaccepted, new combination)
Species Helix caesareana Mousson, 1854 (unaccepted, original combination)
Species Helix cafra A. Férussac, 1821 (unaccepted, new combination)
Species Helix cailleti Crosse, 1864 (unaccepted, junior synonym)
Species Helix cairensis Mayer-Eymar, 1889 † (unaccepted, new combination)
Species Helix calcarea L. Pfeiffer, 1849 (unaccepted, junior synonym)
Species Helix calculosa Gould, 1852 (unaccepted, original combination)
Species Helix caledonica Crosse, 1868 (unaccepted, original combination)
Species Helix calias W. H. Benson, 1859 (unaccepted, original combination)
Species Helix californiensis I. Lea, 1838 (unaccepted)
Species Helix calliope Crosse, 1869 (unaccepted, original combination)
Species Helix calypso L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix cambojiensis Reeve, 1860 (unaccepted, original combination)
Species Helix camelina Bourguignat, 1852 (unaccepted, original combination)
Species Helix camelus L. Pfeiffer, 1855 (unaccepted, original combination)
Species Helix campanyonii Rossmässler, 1839 (unaccepted, original combination)
Species Helix campbellica Filhol, 1880 (unaccepted)
Species Helix campbellii Gray, 1834 (unaccepted, original combination)
Species Helix campesina L. Pfeiffer, 1846 (unaccepted, original combination)
Species Helix candaharica Pfeiffer, 1846 (unaccepted, original combination)
Species Helix candescens C. B. Adams, 1850 (unaccepted)
Species Helix candicans L. Pfeiffer, 1841 (unaccepted, junior synonym)
Species Helix candidissima Draparnaud, 1801 (unaccepted, original combination)
Species Helix candiota L. Pfeiffer, 1849 (unaccepted, original combination)
Species Helix candisata L. Pfeiffer, 1846 (unaccepted, original combination)
Species Helix canovarii Tapparone-Canefri, 1883 (unaccepted, original combination)
Species Helix cantiana Montagu, 1803 (unaccepted, original combination)
Species Helix cantoriana Benson, 1861 (unaccepted, original combination)
Species Helix capensis L. Pfeiffer, 1841 (unaccepted, original combination)
Species Helix caperata Montagu, 1803 (unaccepted)
Species Helix capgrandi Noulet, 1854 † (unaccepted, new combination)
Species Helix capillacea L. Pfeiffer, 1842 (unaccepted)
Species Helix capillacea Férussac, 1832 (unaccepted, original combination)
Species Helix capillata Pease, 1866 (unaccepted, original combination)
Species Helix capitium Benson, 1848 (unaccepted, original combination)
Species Helix capnodes W. G. Binney, 1874 (unaccepted)
Species Helix capsella Gould, 1851 (unaccepted, replacement name)
Species Helix capsula Benson, 1864 (unaccepted, original combination)
Species Helix caputspinulae Reeve, 1852 (unaccepted, junior synonym)
Species Helix carcharias Pfeiffer, 1864 (unaccepted, original combination)
Species Helix carcusiaca Mabille, 1881 (unaccepted)
Species Helix carinata Hombron & Jacquinot, 1841 (unaccepted, invalid: junior homonym of Helix carinata Link, 1807)
Species Helix carinulata Klein, 1853 † (unaccepted, junior synonym)
Species Helix cariosa Olivier, 1804 (unaccepted, original combination)
Species Helix carmelita Tristram, 1865 (unaccepted, junior synonym; preoccupied by Helix carmelita Férussac, 1821)
Species Helix carmelita Férussac, 1821 (unaccepted, non Lichenstein, 1794)
Species Helix carnicolor L. Pfeiffer, 1841 (unaccepted)
Species Helix carocolla Linnaeus, 1758 (unaccepted, original combination)
Species Helix caroliniensis I. Lea, 1831 (unaccepted)
Species Helix caroni Deshayes, 1832 (unaccepted, original combination)
Species Helix carpenteri Newcomb, 1861 (unaccepted)
Species Helix carpenteriana Bland, 1860 (unaccepted)
Species Helix cartaxensis Roman, 1907 † (unaccepted, new combination)
Species Helix carteriensis Quoy & Gaimard, 1832 (unaccepted)
Species Helix carthaginiensis Rossmässler, 1853 (unaccepted, original combination)
Species Helix cartusiana O. F. Müller, 1774 (unaccepted, original combination)
Species Helix caseus L. Pfeiffer, 1860 (unaccepted, original combination)
Species Helix cassida R. T. Lowe, 1831 (unaccepted, original combination)
Species Helix castra Benson, 1852 (unaccepted)
Species Helix castrensis L. Pfeiffer, 1857 (unaccepted, original combination)
Species Helix catantostoma F. Sandberger, 1872 † (unaccepted, new combination)
Species Helix catinus Benson, 1859 (unaccepted, juniour homonym of Helix catinus Pfeiffer, 1857)
Species Helix cavata Mousson, 1854 (unaccepted, junior synonym)
Species Helix cavernula L. Pfeiffer, 1853 (unaccepted, invalid: junior homonym of Helix cavernula Hombron & Jacquinot, 1852)
Species Helix cavernula Hombron & Jacquinot, 1847 (unaccepted, junior synonym)
Species Helix cavimargo Martens, 1879 (unaccepted, original combination)
Species Helix cazenavetti Fischer & Bernardi, 1857 (unaccepted, junior synonym)
Species Helix cellaria O. F. Müller, 1774 (unaccepted)
Species Helix cenchridium Cossmann, 1902 † (unaccepted, new combination)
Species Helix cenestinensis Crosse & Debeaux, 1869 (unaccepted)
Species Helix cepoides Lea, 1840 (unaccepted, original combination)
Species Helix ceramensis L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix cerata Cox, 1868 (unaccepted, replacement name for Helix cerea Cox, 1864 (Helix coxi Crosse, 1866 is an earlier replacement name))
Species Helix cerea Cox, 1864 (unaccepted, invalid: junior homonym of Helix cerea Gould, 1850)
Species Helix cerea L. Pfeiffer, 1851 (unaccepted, invalid; junior homonym of Helix cerea Gould, 1850; Helix cosmia Pfeiffer, 1852 is a replacement name)
Species Helix cerealis Crosse, 1868 (unaccepted, original combination)
Species Helix cereolus Megerle, 1818 (unaccepted)
Species Helix cerina Morelet, 1877 (unaccepted, original combination)
Species Helix cerinoideus Anthony, 1865 (unaccepted)
Species Helix cernua E. von Martens, 1889 (unaccepted, original combination)
Species Helix ceroconus L. Pfeiffer, 1864 (unaccepted, original combination)
Species Helix ceromatica Morelet, 1881 (unaccepted, original combination)
Species Helix cespitum Draparnaud, 1801 (unaccepted, original combination)
Species Helix chaignoni Locard, 1888 † (unaccepted, new combination)
Species Helix chaixi Michaud, 1855 † (unaccepted, incorrect subsequent spelling; new combination)
Species Helix chaixii Michaud, 1855 † (unaccepted, new combination)
Species Helix chamaeleon L. Pfeiffer, 1868 (unaccepted, original combination)
Species Helix chancei Cox, 1870 (unaccepted, original combination)
Species Helix charybdis Benson, 1856 (unaccepted, original combination)
Species Helix chastellii Deshayes in Férussac, 1832 (unaccepted, original combination)
Species Helix chelonitis Crosse, 1868 (unaccepted, original combination)
Species Helix chersina Say, 1821 (unaccepted)
Species Helix chertieri Deshayes, 1863 † (unaccepted)
Species Helix chevalieri Souleyet, 1842 (unaccepted, original combination)
Species Helix chevallieri Cossmann, 1886 † (unaccepted, new combination)
Species Helix chilhoweensis Lewis, 1871 (unaccepted)
Species Helix chinensis Philippi, 1845 (unaccepted, original combination)
Species Helix chlorozona Grateloup, 1840 (unaccepted, original combination)
Species Helix choboensis Mabille, 1889 (unaccepted, original combination)
Species Helix chordata L. Pfeiffer, 1862 (unaccepted)
Species Helix choukoutienensis Ping, 1929 † (unaccepted, new combination)
Species Helix christinae H. Adams, 1870 (unaccepted, original combination)
Species Helix christolii Matheron, 1843 † (unaccepted, new combination)
Species Helix christyi Bland, 1860 (unaccepted)
Species Helix chrysosticta Morelet, 1867 (unaccepted, original combination)
Species Helix chytrophora Mabille, 1887 (unaccepted, original combination)
Species Helix cicatricosa O. F. Müller, 1774 (unaccepted, original combination)
Species Helix cicercula L. Pfeiffer, 1848 (unaccepted, nomen nudum)
Species Helix cidaris Lamarck, 1822 (unaccepted, original combination)
Species Helix cinctella Draparnaud, 1801 (unaccepted, original combination)
Species Helix cineracea Hombron & Jacquinot, 1841 (unaccepted, original combination)
Species Helix cingulata (Studer, 1820) (unaccepted)
Species Helix cingulella Rossmässler, 1837 (unaccepted, original combination)
Species Helix circinnata Rossmässler, 1837 (unaccepted, junior synonym)
Species Helix circumcincta Cox, 1868 (unaccepted, original combination)
Species Helix circumfiliaris Morelet, 1879 (unaccepted, original combination)
Species Helix circumfirmata Redfield, 1853 (unaccepted, original combination)
Species Helix circumlineata L. Pfeiffer, 1846 (unaccepted, original combination)
Species Helix cirtae Terver, 1839 (unaccepted, junior synonym)
Species Helix cisalpina Rossmässler, 1837 (unaccepted, original combination)
Species Helix citrina Linnaeus, 1758 (unaccepted, original combination)
Species Helix citrinula L. Pfeiffer, 1859 (unaccepted, junior synonym)
Species Helix clarencensis Cox, 1865 (unaccepted, junior synonym)
Species Helix clarkii I. Lea, 1858 (unaccepted)
Species Helix clathratula L. Pfeiffer, 1850 (unaccepted, original combination)
Species Helix clausa Férussac, 1821 (unaccepted, nomen nudum)
Species Helix clausus Say, 1821 (unaccepted)
Species Helix clotho Férussac, 1840 (unaccepted, original combination)
Species Helix coadunata Rossmässler, 1838 (unaccepted, junior synonym)
Species Helix coagulum E. von Martens, 1889 (unaccepted, original combination)
Species Helix coarctata L. Pfeiffer, 1850 (unaccepted, invalid: junior homonym of Helix coarctata Montagu, 1803)
Species Helix coarctata Klein, 1853 † (unaccepted, new combination)
Species Helix cochinchinensis L. Pfeiffer, 1862 (unaccepted, original combination)
Species Helix cocqi Brongniart, 1810 † (unaccepted, new combination)
Species Helix codonodes L. Pfeiffer, 1847 (unaccepted, original combination)
Species Helix codringtonii Gray, 1834 (unaccepted, original combination)
Species Helix coffea L. Pfeiffer, 1855 (unaccepted, original combination)
Species Helix collaris Pfeiffer, 1867 (unaccepted, original combination)
Species Helix collingii E. A. Smith, 1893 (unaccepted, original combination)
Species Helix collongeoni Michaud, 1855 † (unaccepted, new combination)
Species Helix colona Martens, 1878 (unaccepted, original combination)
Species Helix columbiana I. Lea, 1838 (unaccepted)
Species Helix comatula F. Sandberger, 1871 † (unaccepted, new combination)
Species Helix commutanda Ancey, 1888 (unaccepted, replacement name)
Species Helix comorensis Morelet, 1881 (unaccepted, original combination)
Species Helix complanata Linnaeus, 1758 (unaccepted, original combination)
Species Helix compluviatus Cox, 1872 (unaccepted, original combination)
Species Helix compressivoluta Reeve, 1852 (unaccepted)
Species Helix concamerata Wood, 1828 (unaccepted, original combination)
Species Helix concava Say, 1821 (unaccepted)
Species Helix concentrica Le Guillou, 1842 (unaccepted, junior synonym)
Species Helix condoriana Crosse & Fischer, 1863 (unaccepted, original combination)
Species Helix conella L. Pfeiffer, 1862 (unaccepted)
Species Helix confinis Gassies, 1875 (unaccepted, original combination)
Species Helix confucii Hilber, 1883 (unaccepted, original combination and rank)
Species Helix confusa Pfeiffer, 1855 (unaccepted, original combination)
Species Helix conicoides Metcalfe, 1851 (unaccepted, original combination)
Species Helix connivens L. Pfeiffer, 1850 (unaccepted, junior synonym)
Species Helix conoidea Cox, 1864 (unaccepted, junior synonym)
Species Helix conoidea Draparnaud, 1801 (unaccepted, original combination)
Species Helix consanguinea Férussac, 1840 (unaccepted, original combination)
Species Helix conscendens Cox, 1866 (unaccepted, original combination)
Species Helix consimilis Pease, 1868 (unaccepted)
Species Helix consona Rossmässler, 1839 (unaccepted, original combination)
Species Helix conspurcata Draparnaud, 1801 (unaccepted, original combination)
Species Helix constantina E. Forbes, 1838 (unaccepted, original combination)
Species Helix constantinae Bourguignat, 1863 (unaccepted, unjustified emendation)
Species Helix constrictelabiata K. Miller, 1907 † (unaccepted, new combination)
Species Helix contermina L. Pfeiffer, 1847 (unaccepted, original combination)
Species Helix continua L. Pfeiffer, 1854 (unaccepted, invalid: junior homonym of Helix continua Reeve, 1854)
Species Helix continua Reeve, 1854 (unaccepted, original combination)
Species Helix contorta Linnaeus, 1758 (unaccepted, original combination)
Species Helix contorta Quoy & Gaimard, 1824 (unaccepted, invalid: junior homonym of Helix contorta Linnaeus, 1758)
Species Helix contorta Rossmässler, 1838 (unaccepted, junior synonym)
Species Helix contractiva Mabille, 1889 (unaccepted, original combination)
Species Helix contraria O.F. Müller, 1774 (unaccepted, original combination)
Species Helix contrarius O. F. Müller, 1774 (unaccepted, original combination)
Species Helix contusa Férussac, 1821 (unaccepted, original combination)
Species Helix conula Pease, 1861 (unaccepted, original combination)
Species Helix conus L. Pfeiffer, 1841 (unaccepted, original combination)
Species Helix convexa Deshayes, 1830 (unaccepted)
Species Helix cooperi W. G. Binney, 1858 (unaccepted)
Species Helix copei Wetherby, 1878 (unaccepted)
Species Helix coquandiana Matheron, 1843 † (unaccepted, junior synonym)
Species Helix cora d'Orbigny, 1835 (unaccepted, original combination)
Species Helix corallina Chemnitz, 1795 (unaccepted)
Species Helix corcyrensis Rossmässler, 1838 (unaccepted, original combination)
Species Helix corduensis Noulet, 1854 † (unaccepted, new combination)
Species Helix coriacea Pallas, 1788 (unaccepted, original combination)
Species Helix coriaria Pfeiffer, 1847 (unaccepted, junior synonym)
Species Helix cornea Linnaeus, 1758 (unaccepted, new combination)
Species Helix corneafulva Pfeiffer, 1862 (unaccepted)
Species Helix corneovirens Pfeiffer, 1851 (unaccepted, original combination)
Species Helix corniculum Reeve, 1852 (unaccepted)
Species Helix cornuarietis Linnaeus, 1758 (unaccepted, original combination)
Species Helix cornumilitare Linnaeus, 1758 (unaccepted, original combination)
Species Helix corrugata L. Pfeiffer, 1847 (unaccepted, junior synonym)
Species Helix corusca Morelet, 1877 (unaccepted, original combination)
Species Helix corvus Gmelin, 1791 (unaccepted, original combination)
Species Helix corymbus Crosse, 1874 (unaccepted, original combination)
Species Helix corys Benson, 1859 (unaccepted, original combination)
Species Helix cosmia L. Pfeiffer, 1852 (unaccepted, original combination)
Species Helix costata O. F. Müller, 1774 (unaccepted)
Species Helix costulata Cox, 1864 (unaccepted, invalid: junior homonym of Helix costulata Lamarck, 1822; Helix saturni is a replacement name)
Species Helix costulata Lamarck, 1822 (unaccepted, original combination)
Species Helix costulatostriata Greppin, 1855 † (unaccepted, new combination)
Species Helix costulifera Pfeiffer, 1854 (unaccepted, original combination)
Species Helix cotteri Roman, 1907 † (unaccepted, new combination)
Species Helix cotyledonis Benson, 1850 (unaccepted, original combination)
Species Helix coxeni Cox, 1871 (unaccepted, original combination)
Species Helix coxi Crosse, 1866 (unaccepted, original combination)
Species Helix cramauxensis Noulet, 1867 † (unaccepted, junior synonym)
Species Helix crassa L. Pfeiffer, 1850 (unaccepted, invalid: junior homonym of Helix crassa da Costa, 1778; Codringtonia neocrassa is a replacement name)
Species Helix crassicostata Benson, 1848 (unaccepted, original combination)
Species Helix crassilabris L. Pfeiffer, 1847 (unaccepted, junior synonym)
Species Helix crebriflammis L. Pfeiffer, 1876 (unaccepted, junior synonym)
Species Helix crebriflammis L. Pfeiffer, 1853 (unaccepted)
Species Helix crebristriata Newcomb, 1864 (unaccepted)
Species Helix creedi Cox, 1868 (unaccepted, original combination)
Species Helix crenata Gmelin, 1791 (unaccepted, original combination)
Species Helix crenella Montagu, 1803 (unaccepted)
Species Helix cretacea Tausch, 1886 † (unaccepted, new combination)
Species Helix creveauxiana Ancey, 1890 (unaccepted, original combination)
Species Helix crinigera Benson, 1850 (unaccepted, original combination)
Species Helix crispolanata Wollaston, 1878 (unaccepted, original combination)
Species Helix crispulata Mousson, 1861 (unaccepted, original combination)
Species Helix croftoni Cox, 1872 (unaccepted, junior synonym)
Species Helix cronkhitei Newcomb, 1865 (unaccepted)
Species Helix crossei L. Pfeiffer, 1862 (unaccepted, original combination)
Species Helix crotali Cox, 1864 (unaccepted, replacement name for Helix inconspicua Forbes, 1852; H. rustica as the earlier name has priority)
Species Helix crusta Dall, 1890 † (unaccepted, new combination)
Species Helix crustulum Cox, 1873 (unaccepted, original combination)
Species Helix crypta L. Pfeiffer, 1868 (unaccepted, junior synonym)
Species Helix crystallina O. F. Müller, 1774 (unaccepted)
Species Helix culminea d'Orbigny, 1835 (unaccepted, original combination)
Species Helix cunninghami Gray in Griffith & Pidgeon, 1834 (unaccepted, objective synonym)
Species Helix cupreus Cox, 1868 (unaccepted, original combination)
Species Helix curtisiana Pfeiffer, 1864 (unaccepted, basionym)
Species Helix cuyana L. Pfeiffer, 1867 (unaccepted, original combination)
Species Helix cyanostoma Mabille, 1884 (unaccepted, junior synonym)
Species Helix cyclaria Morelet, 1875 (unaccepted, original combination)
Species Helix cyclaspis Benson, 1859 (unaccepted, original combination)
Species Helix cyclostomoides Pfeiffer, 1840 (unaccepted, original combination)
Species Helix cymatium L. Pfeiffer, 1856 (unaccepted, original combination)
Species Helix cymatodes L. Pfeiffer, 1852 (unaccepted, original combination)
Species Helix cyparissias L. Pfeiffer, 1847 (unaccepted, junior synonym)
Species Helix cypreophila W. G. Binney & Bland, 1869 (unaccepted)
Species Helix cypria L. Pfeiffer, 1847 (unaccepted, original combination)
Species Helix cyrene Crosse, 1870 (unaccepted, junior synonym)
Species Helix cyrtopleura L. Pfeiffer, 1862 (unaccepted, original combination)
Species Helix cysis Benson, 1852 (unaccepted, original combination)
Species Helix daedalea Gould, 1846 (unaccepted)
Species Helix daghestana Kobelt, 1877 (unaccepted, original combination)
Species Helix daghoba W. T. Blanford & H. F. Blanford, 1861 (unaccepted, original combination)
Species Helix damnata Brongniart, 1810 † (unaccepted, new combination)
Species Helix danae L. Pfeiffer, 1863 (unaccepted, original combination)
Species Helix dandenongensis Petterd, 1879 (unaccepted, original combination)
Species Helix darchiacii De Boissy, 1840 † (unaccepted, new combination)
Species Helix dasilepida Mabille, 1881 (unaccepted, original combination)
Species Helix dealbatus Say, 1821 (unaccepted)
Species Helix decidua L. Pfeiffer, 1857 (unaccepted)
Species Helix declivis F. Sandberger, 1870 † (unaccepted, new combination)
Species Helix decollata Linnaeus, 1758 (unaccepted)
Species Helix decreta Gassies, 1871 (unaccepted, original combination)
Species Helix dectica Mabille, 1888 (unaccepted, original combination)
Species Helix decussata Montagu, 1803 (unaccepted, original combination)
Species Helix decussatula Pease, 1866 (unaccepted, original combination)
Species Helix deferiana Bourguignat [in Locard], 1882 (unaccepted)
Species Helix deflexa Souleyet, 1852 (unaccepted, original combination)
Species Helix deidamia Angas, 1869 (unaccepted, junior synonym)
Species Helix dejeana Heude, 1882 (unaccepted, original combination)
Species Helix dejecta Rossmässler, 1838 (unaccepted, junior synonym)
Species Helix dejecta Moricand, 1836 (unaccepted, original combination)
Species Helix dejecta Petit de la Saussaye, 1842 (unaccepted, synonym and homonym)
Species Helix delibrata Benson, 1836 (unaccepted, original combination)
Species Helix deliciosa L. Pfeiffer, 1863 (unaccepted, original combination)
Species Helix delphinensis Fontannes, 1876 † (unaccepted, new combination)
Species Helix delta L. Pfeiffer, 1857 (unaccepted, original combination)
Species Helix demissus A. Binney, 1843 (unaccepted)
Species Helix denatale L. Pfeiffer, 1856 (unaccepted, original combination)
Species Helix dendrobia Crosse, 1868 (unaccepted)
Species Helix denotata Férussac, 1823 (unaccepted, original combination)
Species Helix densa Adams & Reeve, 1850 (unaccepted, original combination)
Species Helix densipapillata F. Sandberger, 1862 † (unaccepted, new combination)
Species Helix dentata W. Wood, 1828 (unaccepted, original combination)
Species Helix dentifera A. Binney, 1837 (unaccepted)
Species Helix dentula Quenstedt, 1867 † (unaccepted, new combination)
Species Helix denudata Rossmässler, 1836 (unaccepted, original combination)
Species Helix denudata Reuss in Reuss & Meyer, 1849 † (unaccepted, new combination)
Species Helix deplanata Thomä, 1845 † (unaccepted, new combination)
Species Helix deplanchesi Gassies, 1870 (unaccepted)
Species Helix depressa Montagu, 1803 (unaccepted, synonym)
Species Helix derbesiana Crosse, 1875 (unaccepted, original combination)
Species Helix desmarestina Brongniart, 1810 † (unaccepted, new combination)
Species Helix despecta Sowerby I, 1839 (unaccepted, original combination)
Species Helix destituta L. Pfeiffer, 1853 (unaccepted, junior synonym)
Species Helix detecta Férussac, 1827 (unaccepted, original combination)
Species Helix deupesii Noulet, 1854 † (unaccepted, new combination)
Species Helix devexa Reuss, 1861 † (unaccepted)
Species Helix devia Gould, 1846 (unaccepted)
Species Helix diabloensis J. G. Cooper, 1869 (unaccepted)
Species Helix diarti Cossmann, 1907 † (unaccepted, new combination)
Species Helix dichrozona Martens, 1885 (unaccepted, original combination)
Species Helix dicroceri Bourguignat, 1881 † (unaccepted, new combination)
Species Helix dictyodes L. Pfeiffer, 1847 (unaccepted, original combination)
Species Helix dictyonina Euthyme, 1885 (unaccepted)
Species Helix diemenensis Cox, 1868 (unaccepted, original combination)
Species Helix diespiter Dall, 1890 † (unaccepted, new combination)
Species Helix dimorpha Reeve, 1852 (unaccepted)
Species Helix diodonta Say, 1824 (unaccepted, erroneously treated as a junior homonym by Binney, who establed the replacement name Helix sayii)
Species Helix diodontina Heude, 1885 (unaccepted, original combination)
Species Helix dioscoricola C. B. Adams, 1845 (unaccepted, original combination)
Species Helix diptyx O. Boettger, 1869 † (unaccepted, new combination)
Species Helix direpta Dall, 1890 † (unaccepted, new combination)
Species Helix discerpta Deshayes, 1863 † (unaccepted, new combination)
Species Helix discordialis Deshayes, 1839 (unaccepted, original combination)
Species Helix discrepans L. Pfeiffer, 1863 (unaccepted, synonym)
Species Helix disculus A. Braun in Walchner, 1851 † (unaccepted, new combination)
Species Helix discus Thomä, 1845 † (unaccepted, new combination)
Species Helix disparilis Deshayes, 1863 † (unaccepted, new combination)
Species Helix dispersa Gassies, 1863 (unaccepted, original combination)
Species Helix dissidens Deshayes, 1850 (unaccepted)
Species Helix dissimilis d'Orbigny, 1835 (unaccepted)
Species Helix distans Pease, 1866 (unaccepted, original combination)
Species Helix distincta L. Pfeiffer, 1850 (unaccepted, original combination)
Species Helix divesta Gould, 1851 (unaccepted, replacement name)
Species Helix doderleiniana Monterosato, 1869 † (unaccepted, new combination)
Species Helix doliolum L. Pfeiffer, 1846 (unaccepted, original combination)
Species Helix dometi Denainvilliers, 1875 † (unaccepted, new combination)
Species Helix dorri Wattebled, 1886 (unaccepted, original combination)
Species Helix downieana Bland, 1861 (unaccepted)
Species Helix draparnauldi H. Beck, 1837 (unaccepted)
Species Helix drepanensis L. Pfeiffer, 1857 (unaccepted, original combination)
Species Helix dringi Pfeiffer, 1846 (unaccepted, original combination)
Species Helix drouetii De Boissy, 1840 † (unaccepted, new combination)
Species Helix dryanderensis Cox, 1872 (unaccepted, original combination)
Species Helix ducrosti Locard, 1883 † (unaccepted, new combination)
Species Helix dufrenoyii Matheron, 1843 † (unaccepted, new combination)
Species Helix dumasi De Boissy, 1848 † (unaccepted, new combination)
Species Helix dumeticola Benson, 1851 (unaccepted, original combination)
Species Helix dunkeri Reeve, 1852 (unaccepted, original combination)
Species Helix dunniae Gray, 1840 (unaccepted)
Species Helix dupetithouarsi Deshayes, 1840 (unaccepted)
Species Helix duplocincta Martens, 1879 (unaccepted, original combination)
Species Helix duponti Morelet, 1866 (unaccepted, original combination)
Species Helix duporti Bavay & Dautzenberg, 1909 (unaccepted, original combination)
Species Helix dura L. Pfeiffer, 1864 (unaccepted, original combination)
Species Helix duralensis Cox, 1868 (unaccepted, original combination)
Species Helix duranti Newcomb, 1864 (unaccepted)
Species Helix durbani F.E. Edwards, 1852 † (unaccepted, new combination)
Species Helix durieui L. Pfeiffer, 1848 (unaccepted, original combination)
Species Helix durvillii Hombron & Jacquinot, 1841 (unaccepted, original combination)
Species Helix duvalii Petit de la Saussaye, 1844 (unaccepted, original combination)
Species Helix duvalii Michaud, 1862 † (unaccepted, new combination)
Species Helix duvauxi Deshayes, 1832 † (unaccepted, synonym)
Species Helix dyeri Petterd, 1879 (unaccepted)
Species Helix eastlakeana Möllendorff, 1882 (unaccepted, original combination)
Species Helix eburnea Megerle von Mühlfeld, 1824 (unaccepted, original combination)
Species Helix echinophora Férussac, 1839 (unaccepted, original combination)
Species Helix eddystonensis Reeve, 1854 (unaccepted, original combination)
Species Helix edentula Draparnaud, 1805 (unaccepted, original combination)
Species Helix edvardsi Bland, 1858 (unaccepted)
Species Helix edwardsi Cox, 1868 (unaccepted, invalid: junior homonym of Helix edwardsi Bland, 1858; H. meadei is a replacement name)
Species Helix edwardsi Deshayes, 1863 † (unaccepted, new combination; junior homonym of Helix edwardsi Bland, 1858)
Species Helix egena Say, 1825 (unaccepted)
Species Helix egenula Morelet, 1848 (unaccepted, original combination)
Species Helix egesta Gray, 1850 (unaccepted)
Species Helix ehingensis Klein, 1846 † (unaccepted, new combination)
Species Helix ekongensis Angas, 1877 (unaccepted, original combination)
Species Helix elachystoma Martens, 1878 (unaccepted, original combination)
Species Helix elata Rossmässler, 1837 (unaccepted, junior synonym)
Species Helix electrina Gould, 1841 (unaccepted)
Species Helix elegans Gmelin, 1791 (unaccepted, original combination)
Species Helix elegantissima L. Pfeiffer, 1849 (unaccepted, original combination)
Species Helix elevata Say, 1821 (unaccepted)
Species Helix elliotti Redfield, 1858 (unaccepted)
Species Helix ellipsostoma L. Pfeiffer, 1854 (unaccepted, original combination)
Species Helix emma L. Pfeiffer, 1863 (unaccepted, original combination)
Species Helix emoriens Gredler, 1881 (unaccepted, original combination)
Species Helix endoptycha Martens, 1864 (unaccepted, original combination)
Species Helix eoa Crosse, 1868 (unaccepted, original combination)
Species Helix erdelii Roth, 1839 (unaccepted, junior synonym)
Species Helix erecta Mousson, 1873 (unaccepted, original name)
Species Helix erinaceus L. Pfeiffer, 1861 (unaccepted, junior synonym)
Species Helix erubescens R. T. Lowe, 1831 (unaccepted, preoccupied, non Helix erubescens Solander, 1786)
Species Helix escoffierae Fontannes, 1881 † (unaccepted, new combination)
Species Helix espiloca Bland, 1860 (unaccepted)
Species Helix estella d'Orbigny, 1835 (unaccepted, original combination)
Species Helix eta L. Pfeiffer, 1853 (unaccepted)
Species Helix etheridgei Brazier, 1877 (unaccepted, original combination)
Species Helix etrusca Rossmässler, 1835 (unaccepted, original combination)
Species Helix eucharis Deshayes in Férussac, 1840 (unaccepted, original combination)
Species Helix eugenia L. Pfeiffer, 1853 (unaccepted, original combination)
Species Helix euglypha Reuss in Reuss & Meyer, 1849 † (unaccepted, new combination)
Species Helix eustoma L. Pfeiffer, 1857 (unaccepted, original combination)
Species Helix euterpe L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix eutropis L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix eva Reeve, 1853 (unaccepted, original combination)
Species Helix evanstonensis White, 1878 † (unaccepted, new combination)
Species Helix eversa Deshayes in Férussac & Deshayes, 1851 † (unaccepted, junior synonym)
Species Helix exagitans Cox, 1870 (unaccepted, original combination)
Species Helix exaltata L. Pfeiffer, 1855 (unaccepted, original combination)
Species Helix exarata L. Pfeiffer, 1857 (unaccepted)
Species Helix excoriata E. von Martens, 1883 (unaccepted, junior synonym)
Species Helix exigua Stimpson, 1850 (unaccepted)
Species Helix exilis Gmelin, 1791 (unaccepted)
Species Helix exocarpi Cox, 1868 (unaccepted, original combination)
Species Helix exoleta Gould, 1851 (unaccepted)
Species Helix expansa L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix expansilabris F. Sandberger, 1858 † (unaccepted, new combination)
Species Helix expedenta Locard, 1899 (unaccepted)
Species Helix expeditionis Cox, 1868 (unaccepted, original combination)
Species Helix extincta Rambur, 1862 † (unaccepted, new combination; rank changed)
Species Helix eygalierensis Roman, 1899 † (unaccepted, new combination)
Species Helix eyrei H. Adams & Angas, 1876 (unaccepted, original combination)
Species Helix faba Gmelin, 1791 (unaccepted, original combination)
Species Helix fabrefacta Pease, 1865 (unaccepted, original combination)
Species Helix fabrei F. Sandberger, 1873 † (unaccepted, new combination)
Species Helix facilis F. Sandberger, 1875 † (unaccepted, new combination)
Species Helix faciola Draparnaud, 1801 (unaccepted, incorrect original spelling)
Species Helix facta Newcomb, 1864 (unaccepted)
Species Helix fallax Say, 1825 (unaccepted)
Species Helix fanulus L. Pfeiffer, 1856 (unaccepted, original combination)
Species Helix farquhari Melvill & Ponsonby, 1892 (unaccepted, original combination)
Species Helix fasciata J. Adams, 1800 (unaccepted, synonym)
Species Helix fasciola Draparnaud, 1801 (unaccepted, original combination)
Species Helix fasciolata Spix in Wagner, 1827 (unaccepted)
Species Helix fatigata Cox, 1873 (unaccepted, original combination)
Species Helix fatua sensu Hutton, 1882 not Pfeiffer, 1857 (unaccepted)
Species Helix fatua L. Pfeiffer, 1857 (unaccepted)
Species Helix fausta R. T. Lowe, 1831 (unaccepted, original combination)
Species Helix faustina Rossmässler, 1835 (unaccepted, original combination)
Species Helix febigeri Bland, 1866 (unaccepted)
Species Helix febrilis W. T. Blanford & H. F. Blanford, 1861 (unaccepted, original combination)
Species Helix fedtschenkoi Martens, 1874 (unaccepted, original combination)
Species Helix feneriffensis H. Adams & Angas, 1876 (unaccepted, original combination)
Species Helix feralis Hemphill, 1901 (unaccepted)
Species Helix ferculum Deshayes, 1863 † (unaccepted, new combination)
Species Helix ferrantii Deshayes, 1824 † (unaccepted, new combination)
Species Helix ficta Pease, 1865 (unaccepted, original combination)
Species Helix fidelis J.E. Gray, 1834 (unaccepted, new combination)
Species Helix filholi Bourguignat, 1874 † (unaccepted, new combination)
Species Helix filia Mousson, 1861 (unaccepted, original combination)
Species Helix filicina L. Pfeiffer, 1841 (unaccepted, original combination)
Species Helix filippina Heude, 1882 (unaccepted, original combination)
Species Helix fimbriata Bourguignat, 1852 (unaccepted, original combination)
Species Helix fimbriosa Martens, 1875 (unaccepted, original combination)
Species Helix flammea O. F. Müller, 1774 (unaccepted, original combination)
Species Helix flammigera L. Pfeiffer, 1854 (unaccepted)
Species Helix flavida Rossmässler, 1839 (unaccepted, junior synonym)
Species Helix flavocincta Megerle von Mühlfeld, 1829 (unaccepted)
Species Helix fleurati Bourguignat, 1868 (unaccepted, junior synonym)
Species Helix flexuosa L. Pfeiffer, 1855 (unaccepted, original combination)
Species Helix florulifera Reeve, 1852 (unaccepted)
Species Helix flosculus Cox, 1866 (unaccepted, original combination)
Species Helix foetida T. Brown, 1827 (unaccepted)
Species Helix folini Morelet, 1848 (unaccepted, original combination)
Species Helix folliculum Schröter, 1784 (unaccepted, original combination)
Species Helix fontana Lightfoot, 1786 (unaccepted, junior synonym)
Species Helix forbesii Cox, 1864 (unaccepted, invalid: junior homonym of Helix forbesii Pfeiffer, 1845)
Species Helix forensis Wollaston, 1878 (unaccepted, original combination)
Species Helix formosensis L. Pfeiffer, 1866 (unaccepted, original combination)
Species Helix forsteriana Reeve, 1852 (unaccepted, original combination)
Species Helix fortis C. B. Adams, 1850 (unaccepted)
Species Helix fossaria Montagu, 1803 (unaccepted)
Species Helix foullioyi Le Guillou, 1845 (unaccepted, original combination)
Species Helix fouresi Morlet, 1886 (unaccepted, original combination)
Species Helix fragilis Linnaeus, 1758 (unaccepted, original combination)
Species Helix franklandiensis Forbes, 1852 (unaccepted, original combination)
Species Helix frappieri Deshayes, 1863 (unaccepted, junior synonym)
Species Helix fraseri Gray in Griffith & Pidgeon, 1833 (unaccepted, original combination)
Species Helix fratercula Pease, 1867 (unaccepted, original combination)
Species Helix fraterna Say, 1824 (unaccepted)
Species Helix friabilis W. G. Binney, 1857 (unaccepted)
Species Helix fricki L. Pfeiffer, 1858 (unaccepted, original combination)
Species Helix fringilla Pfeiffer, 1855 (unaccepted, original combination)
Species Helix frivaldskyana Rossmässler, 1842 (unaccepted, original combination)
Species Helix frivola Pease, 1866 (unaccepted, original combination)
Species Helix frontonensis Noulet, 1857 † (unaccepted, new combination)
Species Helix fruticum O.F. Müller, 1774 (unaccepted, original combination)
Species Helix fucata Pfeiffer, 1853 (unaccepted, original combination)
Species Helix fulgidus J. Adams, 1797 (unaccepted)
Species Helix fulgurata G. B. Sowerby I, 1839 (unaccepted, original combination)
Species Helix fuliginosa A. Binney, 1840 (unaccepted)
Species Helix fulva O. F. Müller, 1774 (unaccepted)
Species Helix funebris Morelet, 1877 (unaccepted, original combination)
Species Helix funiculata Reeve, 1854 (unaccepted, original combination)
Species Helix furcillata Hupé, 1853 (unaccepted, original combination)
Species Helix fuscolutea Grateloup, 1840 (unaccepted, original combination)
Species Helix fuscosa Rossmässler, 1838 (unaccepted, original combination)
Species Helix fuscozonata Beddome, 1889 (unaccepted, original combination)
Species Helix fusoides d’Orbigny, 1835 (unaccepted, original combination)
Species Helix gabata Gould, 1844 (unaccepted, original combination)
Species Helix gabbii Newcomb, 1864 (unaccepted)
Species Helix gabriellae Dautzenberg & d'Hammonville, 1887 (unaccepted, original combination)
Species Helix gadensis Petterd, 1879 (unaccepted, original combination)
Species Helix galactostoma L. Pfeiffer, 1849 (unaccepted, original combination)
Species Helix galactostomella Mabille, 1886 (unaccepted, junior synonym)
Species Helix galera Heude, 1890 (unaccepted, original combination)
Species Helix galloprovincialis Matheron, 1843 † (unaccepted, junior synonym)
Species Helix gamma L. Pfeiffer, 1854 (unaccepted)
Species Helix gargantua A. Férussac, 1821 (unaccepted, original combination)
Species Helix gaspardiana Paladilhe, 1873 † (unaccepted, new combination)
Species Helix gassiesi L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix gaudens Mabille, 1884 (unaccepted, original combination)
Species Helix gawleri Brazier, 1872 (unaccepted, original combination)
Species Helix gaymardii Matheron, 1843 † (unaccepted, new combination)
Species Helix gelata Cox, 1873 (unaccepted)
Species Helix genezarethana Mousson, 1861 (unaccepted, original combination)
Species Helix geniculata F. Sandberger, 1872 † (unaccepted, junior synonym)
Species Helix gentilsiana Crosse, 1870 (unaccepted, original combination)
Species Helix genulabris Martens, 1860 (unaccepted, junior synonym)
Species Helix georgiana Quoy & Gaimard, 1832 (unaccepted, original combination)
Species Helix germana Gould, 1851 (unaccepted)
Species Helix ghiesbreghti Nyst, 1841 (unaccepted, original combination)
Species Helix giengensis Klein, 1846 † (unaccepted, new combination)
Species Helix gigantea Scopoli, 1786 (unaccepted, original combination)
Species Helix gilberti Pfeiffer, 1846 (unaccepted, original combination)
Species Helix girondica Noulet, 1854 † (unaccepted, junior synonym)
Species Helix girva Frivaldszky, 1835 (unaccepted, original combination)
Species Helix glabella Draparnaud, 1801 (unaccepted, original combination)
Species Helix glabra Rossmässler, 1835 (unaccepted, original combination)
Species Helix glabrata Megerle von Mühlfeld, 1824 (unaccepted)
Species Helix glabriuscula L. Pfeiffer, 1853 (unaccepted)
Species Helix glanvilliana Ancey, 1890 (unaccepted, original combination)
Species Helix glaphyra Say, 1817 (unaccepted)
Species Helix glauca Linnaeus, 1758 (unaccepted, original combination)
Species Helix globula Kaleniczenko, 1853 (unaccepted, preoccupied name, non Helix globula Lea, 1837)
Species Helix globulus O. F. Müller, 1774 (unaccepted, original combination)
Species Helix glockeri Quenstedt, 1884 † (unaccepted, new combination)
Species Helix gloriosa L. Pfeiffer, 1856 (unaccepted, original combination)
Species Helix godarti Michaud, 1855 † (unaccepted, new combination)
Species Helix goldfussii Thomä, 1845 † (unaccepted, new combination)
Species Helix gomerae Wollaston, 1878 (unaccepted, original combination)
Species Helix gomerensis Morelet, 1864 (unaccepted, original combination)
Species Helix goniochila Pfeiffer, 1862 (unaccepted, junior synonym)
Species Helix goodallii J. S. Miller, 1822 (unaccepted, invalid: junior homonym of Helix goodallii Ferussac, 1821)
Species Helix grabhami Wollaston, 1878 (unaccepted, original combination)
Species Helix gradata Gould, 1846 (unaccepted, original combination)
Species Helix graellsiana L. Pfeiffer, 1848 (unaccepted, original combination)
Species Helix graftonensis Cox, 1864 (unaccepted, junior synonym)
Species Helix grandidieri Crosse & P. Fischer, 1875 (unaccepted, junior synonym)
Species Helix granomalleata Wollaston, 1878 (unaccepted, original combination)
Species Helix granti L. Pfeiffer, 1866 (unaccepted, original combination)
Species Helix granulata Roth, 1839 (unaccepted, preoccupied name; non Helix granulata Alder, 1830 nec Helix granulata Quoy & Gaimard, 1832)
Species Helix granulata Quoy & Gaimard, 1832 (unaccepted, original combination)
Species Helix granulosa Férussac, 1840 (unaccepted, original combination)
Species Helix granum L. Pfeiffer, 1857 (unaccepted)
Species Helix gratiosa Cox, 1871 (unaccepted, invalid: junior homonym of Helix gratiosa Studer, 1820)
Species Helix grayi Pfeiffer, 1847 (unaccepted, original combination)
Species Helix greenhilli Cox, 1866 (unaccepted, original combination)
Species Helix greenwoodi Gray, 1850 (unaccepted)
Species Helix gregaria Rossmässler, 1839 (unaccepted, original combination)
Species Helix grenvillei Brazier, 1876 (unaccepted, original combination)
Species Helix grevillei L. Pfeiffer, 1857 (unaccepted, original combination)
Species Helix griseola L. Pfeiffer, 1841 (unaccepted)
Species Helix gruneri L. Pfeiffer, 1845 (unaccepted, original combination)
Species Helix gualinoi Michaud, 1855 † (unaccepted, new combination)
Species Helix guarani d'Orbigny, 1835 (unaccepted)
Species Helix guatemalensis Crosse & P. Fischer, 1872 (unaccepted)
Species Helix guerini Pfeiffer, 1842 (unaccepted, original combination)
Species Helix guestieriana Crosse, 1868 (unaccepted, original combination)
Species Helix guillaini Petit de la Saussaye, 1850 (unaccepted, junior synonym)
Species Helix guiraoana L. Pfeiffer, 1853 (unaccepted, original combination)
Species Helix gularis Say, 1821 (unaccepted)
Species Helix gulosa Gould, 1846 (unaccepted, original combination)
Species Helix gundlachi Pfeiffer, 1840 (unaccepted, original combination)
Species Helix guttula Pfeiffer, 1853 (unaccepted, original combination)
Species Helix gyrina Gassies, 1859 (unaccepted, invalid: junior homonym of Helix gyrina Deshayes, 1850)
Species Helix gyroides L. Pfeiffer, 1871 (unaccepted, junior synonym)
Species Helix gyrorbis Klein, 1846 † (unaccepted, new combination)
Species Helix hahni Mabille, 1887 (unaccepted, original combination)
Species Helix hainesii Pfeiffer, 1856 (unaccepted, original combination)
Species Helix halata (Mousson, 1849) (unaccepted, original combination)
Species Helix haliotoidea Linnaeus, 1758 (unaccepted, original combination)
Species Helix hamiltoni Cox, 1868 (unaccepted, original combination)
Species Helix hannensis Rang, 1831 (unaccepted)
Species Helix hapa Hombron & Jacquinot, 1852 (unaccepted, junior synonym)
Species Helix hardouini de Morgan, 1885 (unaccepted, original combination)
Species Helix hariola Benson, 1856 (unaccepted, original combination)
Species Helix harpa Say, 1824 (unaccepted)
Species Helix harriettae Cox, 1868 (unaccepted, original combination)
Species Helix hartvigiana L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix hartwegi L. Pfeiffer, 1846 (unaccepted)
Species Helix haruspica Dall, 1890 † (unaccepted, new combination)
Species Helix haveri Michelotti, 1847 † (unaccepted, new combination)
Species Helix haydeni Gabb, 1869 (unaccepted)
Species Helix hayii Gray in Griffith & Pidgeon, 1833 (unaccepted, original combination)
Species Helix hazardi Bland, 1858 (unaccepted)
Species Helix headonensis F.E. Edwards, 1852 † (unaccepted, new combination)
Species Helix heberti Deshayes, 1863 † (unaccepted, new combination)
Species Helix heckeliana Crosse, 1872 (unaccepted, unnecessary nom. nov. for Helix rossiteriana Crosse, 1871, by Crosse treated as a junior homonym of Helix rossiteri Angas, 1869)
Species Helix hectori Suter, 1890 (unaccepted, original combination)
Species Helix heldiana L. Pfeiffer, 1853 (unaccepted)
Species Helix heldreichi L. Pfeiffer, 1846 (unaccepted, original combination)
Species Helix helicarion Voigt, 1834 (unaccepted, nom. nov. pro Helicarion freycineti Quoy & Gaimard, 1824 non Helixarion freycineti Férussac, 1821)
Species Helix helva Cox, 1870 (unaccepted, original combination)
Species Helix hemipleuris Möllendorff, 1885 (unaccepted, original combination)
Species Helix hemisphaerica Michaud, 1837 † (unaccepted, new combination)
Species Helix hemphillii Newcomb, 1869 (unaccepted)
Species Helix henschei L. Pfeiffer, 1867 (unaccepted, original combination)
Species Helix hepatizon Gould, 1845 (unaccepted, original combination)
Species Helix hermanni L. Pfeiffer, 1866 (unaccepted)
Species Helix hermione Angas, 1870 (unaccepted, original combination)
Species Helix heroica L. Pfeiffer, 1855 (unaccepted, original combination)
Species Helix hesperarche Cockerell, 1914 † (unaccepted, new combination)
Species Helix hetaera Pfeiffer, 1860 (unaccepted, junior synonym)
Species Helix heynemanni L. Pfeiffer, 1862 (unaccepted, original combination)
Species Helix hidalgoiana Crosse, 1864 (unaccepted, original combination)
Species Helix hierosolyma Mousson, 1854 (unaccepted, junior synonym)
Species Helix hierosolymitana Bourguignat, 1852 (unaccepted, junior synonym)
Species Helix hildagoiana Crosse, 1864 (unaccepted, junior synonym)
Species Helix hillebrandi Newcomb, 1864 (unaccepted)
Species Helix hipparionum Ping, 1929 † (unaccepted, new combination)
Species Helix hippocrepis L. Pfeiffer, 1848 (unaccepted)
Species Helix hirsuta Say, 1817 (unaccepted)
Species Helix hispanica Rossmässler, 1838 (unaccepted, preoccupied name; non Helix lactea var. Hispanica Potiez & Michaud, 1835)
Species Helix hispida Linnaeus, 1758 (unaccepted, original combination)
Species Helix hispidula Lamarck, 1822 (unaccepted, new combination)
Species Helix hitachi Ijima, 1891 (unaccepted, junior synonym)
Species Helix hochheimensis O. Boettger, 1897 † (unaccepted, new combination)
Species Helix hochstetteri L. Pfeiffer, 1862 (unaccepted)
Species Helix hoffmanni Rossmässler, 1836 (unaccepted, original combination)
Species Helix hololoma Möllendorff, 1887 (unaccepted, original combination)
Species Helix homalospira Morelet, 1883 (unaccepted, original combination)
Species Helix hombresi Fontannes, 1884 † (unaccepted, new combination)
Species Helix hombroni Pfeiffer, 1857 (unaccepted, basionym)
Species Helix hookeri Reeve, 1854 (unaccepted, original combination)
Species Helix hookeriana Petterd, 1879 (unaccepted, original combination)
Species Helix hopetonensis Shuttleworth, 1852 (unaccepted)
Species Helix hornii Gabb, 1866 (unaccepted)
Species Helix horrida L. Pfeiffer, 1863 (unaccepted, original combination)
Species Helix hortensis O. F. Müller, 1774 (unaccepted)
Species Helix hortulana Thomä, 1845 † (unaccepted, new combination)
Species Helix hospitans Rossmässler, 1836 (unaccepted, original combination)
Species Helix hottentota Melvill & Ponsonby, 1891 (unaccepted, original combination)
Species Helix hova Angas, 1877 (unaccepted, original combination)
Species Helix howeinsulae Cox, 1873 (unaccepted, original combination)
Species Helix huaheinensis L. Pfeiffer, 1853 (unaccepted, original combination)
Species Helix hubbardi A. D. Brown, 1861 (unaccepted, original combination)
Species Helix hudsoniae Benson, 1864 (unaccepted, original combination)
Species Helix hueensis Wattebled, 1886 (unaccepted, original combination)
Species Helix hugonis L. Pfeiffer, 1864 (unaccepted, original combination)
Species Helix humboldtiana L. Pfeiffer, 1841 (unaccepted, original combination)
Species Helix humphreysiana I. Lea, 1841 (unaccepted, original combination)
Species Helix hungerfordiana Möllendorff, 1884 (unaccepted, original combination)
Species Helix hunteri Cox, 1872 (unaccepted, original combination)
Species Helix huttoni L. Pfeiffer, 1842 (unaccepted, original combination)
Species Helix hydatina Rossmässler, 1838 (unaccepted, original combination)
Species Helix hydrophyla Miles, 1861 (unaccepted, nomen nudum)
Species Helix hygrohylaea d'Orbigny, 1835 (unaccepted, original combination)
Species Helix hypolepta Shuttelworth, 1854 (unaccepted, original combination)
Species Helix hypopolia L. Pfeiffer, 1853 (unaccepted)
Species Helix hystricella L. Pfeiffer, 1859 (unaccepted, original combination)
Species Helix hystrix L. Pfeiffer, 1846 (unaccepted, original combination)
Species Helix hystrix Cox, 1868 (unaccepted, invalid: junior homonym of Helix hystrix Pfeiffer, 1846)
Species Helix idahoensis Newcomb, 1866 (unaccepted)
Species Helix ide Gray, 1850 (unaccepted)
Species Helix ignescens L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix igniflua Reeve, 1852 (unaccepted)
Species Helix ignota Mabille, 1865 (unaccepted)
Species Helix illustris L. Pfeiffer, 1863 (unaccepted, original combination)
Species Helix illyrica Stabile, 1864 (unaccepted, original combination)
Species Helix immaculata Adams & Reeve, 1850 (unaccepted, junior synonym)
Species Helix imperfecta Deshayes, 1863 (unaccepted, original combination)
Species Helix impexa Reeve, 1852 (unaccepted, replacement name for Helix inconspicua Forbes, 1852; H. rustica as the earlier name has priority)
Species Helix improbata Mousson, 1861 (unaccepted, junior synonym)
Species Helix imula Locard, 1899 (unaccepted)
Species Helix inaguensis Weinland, 1880 (unaccepted)
Species Helix inca d'Orbigny, 1835 (unaccepted, original combination)
Species Helix incei Pfeiffer, 1846 (unaccepted, original combination)
Species Helix incerta Draparnaud, 1805 (unaccepted, original combination)
Species Helix inclara Morelet, 1889 (unaccepted, original combination)
Species Helix inconspicua Forbes, 1852 (unaccepted, invalid: junior homonym of Helix inconspicua Adams, 1849; Helix rustica Pfeiffer, 1852 is a replacement name)
Species Helix incrassata Klein, 1853 † (unaccepted, new combination)
Species Helix increscens Thomä, 1845 † (unaccepted, new combination)
Species Helix incrustata Poey, 1853 (unaccepted)
Species Helix indentata Say, 1822 (unaccepted)
Species Helix indica L. Pfeiffer, 1846 (unaccepted, original combination)
Species Helix induta Tate, 1878 (unaccepted, Invalid: junior homonym of Helix induta Pfeiffer, 1846)
Species Helix induta Pfeiffer, 1846 (unaccepted, junior synonym)
Species Helix inequalis L. Pfeiffer, 1854 (unaccepted, original combination)
Species Helix inermis Morelet, 1864 (unaccepted, original combination)
Species Helix inesilla Mabille, 1889 (unaccepted, synonym)
Species Helix infans L. Pfeiffer, 1854 (unaccepted, original combination)
Species Helix infecta Reeve, 1852 (unaccepted)
Species Helix inflata Kobelt, 1876 (unaccepted, original combination)
Species Helix inflecta Say, 1821 (unaccepted)
Species Helix inflecta L. Pfeiffer, 1858 (unaccepted, junior synonym)
Species Helix inflexa Zieten, 1832 † (unaccepted, new combination)
Species Helix infracta Martens, 1896 (unaccepted, original combination)
Species Helix infrendens Gould, 1843 (unaccepted, original combination)
Species Helix infudibulus Hombron & Jacquinot, 1841 (unaccepted, original combination)
Species Helix infula Benson, 1848 (unaccepted, original combination)
Species Helix infumata Gould, 1855 (unaccepted)
Species Helix infundibulum Valenciennes, 1846 (unaccepted, junior synonym)
Species Helix ingallsiana P. Fischer, 1877 (unaccepted)
Species Helix ingens C. B. Adams, 1850 (unaccepted)
Species Helix ingersollii Bland, 1875 (unaccepted, new combination)
Species Helix injussa W. T. Blanford & H. F. Blanford, 1861 (unaccepted, original combination)
Species Helix innominatus Heude, 1885 (unaccepted, original combination)
Species Helix inops Mousson, 1872 (unaccepted, original combination)
Species Helix inops Morelet, 1889 (unaccepted, invalid; junior homonym of Helix inops Mousson, 1872)
Species Helix inornata Say, 1822 (unaccepted)
Species Helix insignis Zieten, 1832 † (unaccepted, new combination)
Species Helix insolita Rossmässler, 1838 (unaccepted, original combination)
Species Helix instabilis Rossmässler, 1838 (unaccepted, original combination)
Species Helix instrumosa Dall, 1890 † (unaccepted, new combination)
Species Helix intercarinata Mighels, 1854 (unaccepted, junior synonym)
Species Helix intercisa W. G. Binney, 1857 (unaccepted)
Species Helix interna Say, 1821 (unaccepted, original combination)
Species Helix interrupta Benson, 1834 (unaccepted, original combination)
Species Helix intersecta Poiret, 1801 (unaccepted)
Species Helix intertextus A. Binney, 1840 (unaccepted)
Species Helix intricata Noulet, 1854 † (unaccepted, junior synonym)
Species Helix introferens Bland, 1860 (unaccepted)
Species Helix intumescens Martens, 1867 (unaccepted, original combination)
Species Helix intusplicata L. Pfeiffer, 1851 (unaccepted, original combination)
Species Helix invalida C. B. Adams, 1850 (unaccepted)
Species Helix inversus Müller, 1774 (unaccepted, original combination)
Species Helix involuta Thomä, 1845 † (unaccepted, new combination)
Species Helix involutaeformis Sinzov, 1875 † (unaccepted, new combination)
Species Helix involvulus O.F. Müller, 1774 (unaccepted, original combination)
Species Helix isabellensis Souverbie, 1863 (unaccepted, junior synonym)
Species Helix isilensis L. Pfeiffer, 1853 (unaccepted, original combination)
Species Helix isis L. Pfeiffer, 1860 (unaccepted, original combination)
Species Helix isodon Reeve, 1853 (unaccepted, original combination)
Species Helix isseli Morelet, 1872 (unaccepted, original combination)
Species Helix iuloidea Forbes, 1852 (unaccepted, original combination)
Species Helix jacksoniensis Gray, 1834 (unaccepted, original combination)
Species Helix jacksonii Bland, 1866 (unaccepted)
Species Helix jacquinoti L. Pfeiffer, 1849 (unaccepted, original combination)
Species Helix jaculata Mabille, 1887 (unaccepted, synonym)
Species Helix jamaicensis Gmelin, 1791 (unaccepted)
Species Helix jannellei Le Guillou, 1842 (unaccepted, original combination)
Species Helix janthina Linnaeus, 1758 (unaccepted, original combination)
Species Helix janthina Forsskål, 1775 (unaccepted, junior synonym and homonym)
Species Helix janthinoides Serres, 1829 † (unaccepted, new combination)
Species Helix janus C. B. Adams, 1841 (unaccepted)
Species Helix japonica L. Pfeiffer, 1847 (unaccepted, original combination)
Species Helix javacensis Férussac, 1821 (unaccepted, original combination)
Species Helix jebusitica Roth, 1855 (unaccepted, original combination)
Species Helix jeffreysiana L. Pfeiffer, 1853 (unaccepted)
Species Helix jejuna Say, 1821 (unaccepted)
Species Helix jenynsi L. Pfeiffer, 1846 (unaccepted, original combination)
Species Helix jervisensis Quoy & Gaimard, 1832 (unaccepted, original combination)
Species Helix johnii Holten, 1802 (unaccepted, original combination)
Species Helix joossii K. Miller, 1907 † (unaccepted, new combination)
Species Helix joppensis Schmidt, 1855 (unaccepted, junior synonym)
Species Helix jourdani Michaud, 1862 † (unaccepted, new combination)
Species Helix jourdyi Morlet, 1886 (unaccepted, original combination)
Species Helix jucunda L. Pfeiffer, 1864 (unaccepted, original combination)
Species Helix jugosa Mighels, 1845 (unaccepted, original combination)
Species Helix jungermanniae Petterd, 1879 (unaccepted)
Species Helix juno L. Pfeiffer, 1850 (unaccepted, original combination)
Species Helix kalmitana A. Braun in Walchner, 1851 † (unaccepted, junior synonym)
Species Helix kanabensis White, 1876 † (unaccepted, new combination)
Species Helix kappa L. Pfeiffer, 1854 (unaccepted)
Species Helix katauensis Tapparone-Canefri, 1883 (unaccepted, junior synonym)
Species Helix kawaiensis L. Pfeiffer, 1855 (unaccepted)
Species Helix kellettii Forbes, 1850 (unaccepted)
Species Helix kempseyensis Cox, 1872 (unaccepted, junior synonym)
Species Helix keppelli Pfeiffer, 1855 (unaccepted, original combination)
Species Helix kermadecensis E. A. Smith, 1873 (unaccepted)
Species Helix kermadeci L. Pfeiffer, 1856 (unaccepted)
Species Helix kershawi Petterd, 1879 (unaccepted, original combination)
Species Helix kleciachi L. Pfeiffer, 1871 (unaccepted, original combination)
Species Helix kleinii Klein, 1846 † (unaccepted, new combination)
Species Helix knysnaensis L. Pfeiffer, 1846 (unaccepted, original combination)
Species Helix kochi L. Pfeiffer, 1846 (unaccepted, original combination)
Species Helix kollari L. Pfeiffer, 1856 (unaccepted, original combination)
Species Helix kopnodes W. G. Binney, 1857 (unaccepted)
Species Helix koraegaelia Bourguignat in Locard, 1882 (unaccepted, original combination)
Species Helix kraussi L. Pfeiffer, 1846 (unaccepted)
Species Helix kreffti Cox, 1864 (unaccepted, original combination)
Species Helix kreitneri Hilber, 1883 † (unaccepted, new combination)
Species Helix krynickii Andrzejowski in Krynicki, 1833 (unaccepted, original combination)
Species Helix labiosa Montagu, 1803 (unaccepted, synonym)
Species Helix labiosa Gould, 1846 (unaccepted)
Species Helix labrella Lamarck, 1822 (unaccepted, junior synonym)
Species Helix labrosa Bland, 1862 (unaccepted)
Species Helix labuanensis L. Pfeiffer, 1864 (unaccepted, original combination)
Species Helix labyrinthica Say, 1817 (unaccepted, original combination)
Species Helix labyrinthicula Michaud, 1855 † (unaccepted, new combination)
Species Helix labyrinthus Lamarck, 1792 (unaccepted, junior synonym)
Species Helix labyrinthus Chemnitz, 1795 (unaccepted, Name first established n a work placed by ICZN on the Official Index of Rejected Works)
Species Helix lacertarum Bourguignat, 1863 (unaccepted, original combination)
Species Helix lachesis Férussac, 1840 (unaccepted, original combination)
Species Helix lactea O. F. Müller, 1774 (unaccepted, original combination)
Species Helix lactiflua Pfeiffer, 1861 (unaccepted, original combination)
Species Helix lacuna Montagu, 1803 (unaccepted, synonym)
Species Helix lacunosus d'Orbigny, 1835 (unaccepted, original combination)
Species Helix laeta Gould, 1859 (unaccepted, junior synonym)
Species Helix laeva O. F. Müller, 1774 (unaccepted, original combination)
Species Helix laevigata Férussac, 1821 (unaccepted)
Species Helix laevipes Müller, 1774 (unaccepted, original combination)
Species Helix lahatensis de Morgan, 1885 (unaccepted, original combination)
Species Helix lalloensis L. Pfeiffer, 1855 (unaccepted, original combination)
Species Helix lamarckii Férussac, 1821 (unaccepted, superseded original combination)
Species Helix lamarei L. Pfeiffer, 1853 (unaccepted, original combination)
Species Helix lambda L. Pfeiffer, 1853 (unaccepted)
Species Helix lambei Pfeiffer, 1856 (unaccepted, original combination)
Species Helix lamellosa Férussac, 1824 (unaccepted, original combination)
Species Helix laminata Pease, 1866 (unaccepted, original combination)
Species Helix lampas O. F. Müller, 1774 (unaccepted, original combination)
Species Helix lampra Reeve, 1854 (unaccepted, original combination)
Species Helix lamproides Cox, 1868 (unaccepted, original combination)
Species Helix lancula Férussac, 1821 (unaccepted, original combination)
Species Helix langi Rossmässler, 1857 (unaccepted, junior synonym)
Species Helix langloisiana Bourguignat, 1853 (unaccepted, original combination)
Species Helix lanx Férussac, 1821 (unaccepted, junior synonym)
Species Helix laomontana L. Pfeiffer, 1863 (unaccepted, original combination)
Species Helix lapicidella Thomä, 1845 † (unaccepted, junior synonym)
Species Helix lapicidites Boubée, 1831 † (unaccepted, new combination)
Species Helix lapidaria Thomä, 1845 † (unaccepted, new combination)
Species Helix laqueata Baird, 1873 (unaccepted, junior synonym)
Species Helix largillierti Pfeiffer, 1849 (unaccepted, original combination)
Species Helix lartetii De Boissy, 1840 † (unaccepted, junior synonym)
Species Helix lasmodon Phillips, 1841 (unaccepted)
Species Helix latastei Letourneux in Letourneux & Bourguignat, 1887 (unaccepted, original combination)
Species Helix latasteopsis Letourneux & Bourguignat, 1887 (unaccepted, original combination)
Species Helix latebrosa Dall, 1890 † (unaccepted, new combination)
Species Helix latizona L. Pfeiffer, 1864 (unaccepted, original combination)
Species Helix launcestonensis Reeve, 1853 (unaccepted, original combination)
Species Helix lausanni Dumont & Mortillet, 1852 † (unaccepted, new combination)
Species Helix laxecostulata F. Sandberger, 1871 † (unaccepted, new combination)
Species Helix leacockiana Wollaston, 1878 (unaccepted, original combination)
Species Helix leaii A. Binney, 1840 (unaccepted)
Species Helix lecontii I. Lea, 1852 (unaccepted)
Species Helix ledereri L. Pfeiffer, 1856 (unaccepted, original combination)
Species Helix legrandi Cox, 1868 (unaccepted, original combination)
Species Helix leichardti Cox, 1864 (unaccepted, junior synonym)
Species Helix leidyi Hall & Meek, 1855 † (unaccepted, original combination)
Species Helix leiophis Benson, 1860 (unaccepted, original combination)
Species Helix lemani Brongniart, 1810 † (unaccepted, new combination)
Species Helix lenta Solander in Brander, 1766 † (unaccepted, new combination)
Species Helix lenticula Michaud, 1831 (unaccepted, new combination)
Species Helix leobersdorfensis Troll, 1907 † (unaccepted, original combination)
Species Helix lepida Reuss in Reuss & Meyer, 1849 † (unaccepted, new combination)
Species Helix lepidotricha A. Braun in Walchner, 1851 † (unaccepted, junior objective synonym; new combination)
Species Helix leporina Gould, 1848 (unaccepted)
Species Helix leprieurii Petit, 1840 (unaccepted, original combination)
Species Helix leptogramma Pfeiffer, 1846 (unaccepted, original combination)
Species Helix leptoloma A. Braun in Walchner, 1851 † (unaccepted, new combination)
Species Helix lessoni Pfeiffer, 1846 (unaccepted, basionym)
Species Helix leucocheilus Cox, 1868 (unaccepted, nom nov. pro Helix mariae Cox, 1864)
Species Helix leucodon L. Pfeiffer, 1847 (unaccepted, original combination)
Species Helix leucostyla L. Pfeiffer, 1855 (unaccepted, original combination)
Species Helix leucothoe Pfeiffer, 1861 (unaccepted, original combination)
Species Helix leucotropis L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix leucozona C. Pfeiffer, 1828 (unaccepted, original combination)
Species Helix levicula Benson, 1859 (unaccepted, original combination)
Species Helix leymerieana Noulet, 1854 † (unaccepted, junior synonym)
Species Helix lichnorum d'Orbigny, 1835 (unaccepted, original combination)
Species Helix lienardiana Crosse, 1864 (unaccepted, original combination)
Species Helix lifouana Marie, 1867 (unaccepted, unjustified emendation )
Species Helix lifuana Montrouzier, 1860 (unaccepted, original combination)
Species Helix ligera Say, 1821 (unaccepted)
Species Helix lightfootiana L. Pfeiffer, 1854 (unaccepted, junior synonym)
Species Helix liliaceus Férussac, 1832 (unaccepted, original combination)
Species Helix limatulus A. Binney, 1840 (unaccepted)
Species Helix limbata Draparnaud, 1805 (unaccepted, original combination)
Species Helix limitaris Dawson, 1875 (unaccepted)
Species Helix limnoides Férussac, 1832 (unaccepted, original combination)
Species Helix limonoica d'Orbigny, 1835 (unaccepted, original combination)
Species Helix lindstedti Pfeiffer, 1857 (unaccepted, original combination)
Species Helix lineata Say, 1817 (unaccepted)
Species Helix lineata Spix in Wagner, 1827 (unaccepted, original combination)
Species Helix linguifera Férussac, 1821 (unaccepted)
Species Helix linophora Morelet, 1860 (unaccepted, original combination)
Species Helix lirata Cox, 1864 (unaccepted, original combination)
Species Helix liratula L. Pfeiffer, 1860 (unaccepted, original combination)
Species Helix lisbonensis L. Pfeiffer, 1846 (unaccepted, junior synonym)
Species Helix lithophaga Conrad, 1852 (unaccepted, original combination)
Species Helix littorina Delle Chiaje, 1828 (unaccepted, original combination)
Species Helix liturata L. Pfeiffer, 1853 (unaccepted, original combination)
Species Helix lituus Lesson, 1831 (unaccepted, original combination)
Species Helix livesayi L. Pfeiffer, 1860 (unaccepted, original combination)
Species Helix lizardensis L. Pfeiffer, 1863 (unaccepted, original combination)
Species Helix locardi Falsan & Locard, 1879 † (unaccepted, new combination)
Species Helix longsonensis Morlet, 1891 (unaccepted, original combination)
Species Helix loricata Gould, 1846 (unaccepted)
Species Helix lorioliana Crosse, 1863 (unaccepted, original combination)
Species Helix lottah Petterd, 1879 (unaccepted, original combination)
Species Helix louisiadensis Forbes, 1852 (unaccepted, original combination)
Species Helix loveni F. Krauss, 1848 (unaccepted, original combination)
Species Helix loweana Wollaston, 1878 (unaccepted, original combination)
Species Helix loxotata Mabille, 1887 (unaccepted, original combination)
Species Helix lubrica O. F. Müller, 1774 (unaccepted)
Species Helix lubricus O. F. Müller, 1774 (unaccepted)
Species Helix lucana O. F. Müller, 1774 (unaccepted, original combination)
Species Helix lucani Tournouër, 1866 † (unaccepted, new combination)
Species Helix lucbardezensis Noulet, 1854 † (unaccepted, new combination)
Species Helix lucida Draparnaud, 1801 (unaccepted)
Species Helix lucifuga Rossmässler, 1835 (unaccepted, junior synonym)
Species Helix ludovici Noulet, 1854 † (unaccepted, new combination)
Species Helix luedersi L. Pfeiffer, 1855 (unaccepted, original combination)
Species Helix luhuana Sowerby I, 1839 (unaccepted, original combination)
Species Helix luna Michaud, 1837 † (unaccepted, new combination)
Species Helix lunula Thomä, 1845 † (unaccepted, new combination)
Species Helix lusitanica L. Pfeiffer, 1841 (unaccepted, original combination)
Species Helix luteocornea Reeve, 1854 (unaccepted, original combination)
Species Helix luteocornea Pfeiffer, 1855 (unaccepted, invalid: junior homonym of Helix luteocornea Reeve, 1854)
Species Helix luteofusca Cox, 1868 (unaccepted, original combination)
Species Helix lychna Mabille, 1884 (unaccepted, junior synonym)
Species Helix lychnia Benson, 1852 (unaccepted, original combination)
Species Helix lyndhurstensis Cox, 1868 (unaccepted, junior synonym)
Species Helix lyndi Angas, 1872 (unaccepted)
Species Helix lyonetianus Pallas, 1780 (unaccepted, original combination)
Species Helix mabillei Crosse, 1864 (unaccepted, junior synonym)
Species Helix Mac andrewiana L. Pfeiffer, 1853 (unaccepted, original combination)
Species Helix macgillivrayi Forbes, 1852 (unaccepted, original combination)
Species Helix macgregori Cox, 1870 (unaccepted, original combination)
Species Helix mackensiana Souleyet, 1841 (unaccepted, original combination)
Species Helix macleayi Cox, 1865 (unaccepted, original combination)
Species Helix macneili Crosse, 1873 (unaccepted, original combination)
Species Helix macquariensis Cox, 1872 (unaccepted, original combination)
Species Helix macrocheila Reuss in Reuss & Meyer, 1849 † (unaccepted, new combination)
Species Helix macropleuris Benson, 1859 (unaccepted, original combination)
Species Helix maculata Born, 1778 (unaccepted, non Müller, 1774)
Species Helix madagascariensis Lamarck, 1816 (unaccepted, original combination)
Species Helix madecassina Férussac, 1821 (unaccepted, original combination)
Species Helix maderaspatana Gray, 1834 (unaccepted, original combination)
Species Helix magnaciana Heude, 1882 (unaccepted, original combination)
Species Helix magnilabiata Sacco, 1884 † (unaccepted, synonym)
Species Helix magnini Locard, 1883 † (unaccepted, junior synonym)
Species Helix maguntina Deshayes, 1832 † (unaccepted, new combination)
Species Helix maino Brazier, 1876 (unaccepted, original combination)
Species Helix major A. Binney, 1837 (unaccepted)
Species Helix malaccana L. Pfeiffer, 1854 (unaccepted, original combination)
Species Helix malantensis Angas, 1876 (unaccepted, original combination)
Species Helix malleolata F. Sandberger, 1875 † (unaccepted, junior synonym)
Species Helix malziana L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix mandarina Sowerby I, 1839 (unaccepted, original combination)
Species Helix mansueta Reeve, 1854 (unaccepted, original combination)
Species Helix marcescens Cox, 1868 (unaccepted, original combination)
Species Helix margarita Montagu, 1808 (unaccepted, synonym)
Species Helix marginata Müller, 1774 (unaccepted, original combination)
Species Helix marginella Gmelin, 1791 (unaccepted)
Species Helix mariae Cox, 1865 (unaccepted, supposedly secondary junior homonym of Nanina mariae Gray, 1843, currently Laoma mariae (Gray, 1843))
Species Helix mariciei Cousin, 1887 (unaccepted, intended corrected spelling for Helix mauritii Jousseaume, 1887)
Species Helix mariei Crosse, 1867 (unaccepted, original combination)
Species Helix mariella H. Adams, 1870 (unaccepted, original combination)
Species Helix marioni Matheron, 1879 † (unaccepted, new combination)
Species Helix marmorata Cox, 1864 (unaccepted, invalid: junior homonym of Helix marmorata Férussac, 1821; H. circumcincta is a replacement name)
Species Helix marmorella L. Pfeiffer, 1846 (unaccepted, original combination)
Species Helix martensi L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix martinii Bernardi, 1858 (unaccepted, invalid: junior homonym of Helix martinii Pfeiffer, 1854)
Species Helix masadae Tristram, 1865 (unaccepted, junior synonym)
Species Helix massiei Morlet, 1891 (unaccepted, original combination)
Species Helix massiliensis Matheron, 1843 † (unaccepted, new combination)
Species Helix massylaea Morelet, 1851 (unaccepted, original combination)
Species Helix mastersi Cox, 1864 (unaccepted, original combination)
Species Helix mathildae Westerlund, 1881 (unaccepted, original combination)
Species Helix mathinnae Petterd, 1879 (unaccepted, original combination)
Species Helix mathiusii d'Orbigny, 1835 (unaccepted)
Species Helix mattiaca Steininger, 1835 † (unaccepted, new combination)
Species Helix matura L. Pfeiffer, 1855 (unaccepted, original combination)
Species Helix mauritiana L. Pfeiffer, 1854 (unaccepted, junior synonym)
Species Helix mauritianella Morelet, 1851 (unaccepted, original combination)
Species Helix mauritii Jousseaume, 1887 (unaccepted, invalid: unnecessary nom nov. pro Helix atrata Reeve, 1852 not Pfeiffer, 1854)
Species Helix maxillata Gould, 1848 (unaccepted)
Species Helix mazzinincola De Gregorio, 1892 † (unaccepted, new combination)
Species Helix mazzulopsis Pilsbry, 1893 (unaccepted, junior synonym)
Species Helix megei Lambert, 1873 (unaccepted, original combination)
Species Helix melaleucarum Gassies, 1872 (unaccepted, original combination)
Species Helix melanotrica Mabille, 1888 (unaccepted, original combination)
Species Helix melbournensis Cox, 1868 (unaccepted, original combination)
Species Helix meleagris L. Pfeiffer, 1855 (unaccepted, original combination)
Species Helix melitae Gassies, 1870 (unaccepted)
Species Helix mellea L. Pfeiffer, 1866 (unaccepted, original combination)
Species Helix melo Quoy & Gaimard, 1832 (unaccepted, original combination)
Species Helix membranicosta L. Pfeiffer, 1854 (unaccepted, original combination)
Species Helix menardi Brongniart, 1810 † (unaccepted, new combination)
Species Helix mendana Angas, 1867 (unaccepted, junior synonym)
Species Helix mendax Martens, 1864 (unaccepted, original combination)
Species Helix meneghiniana Vinassa de Regny, 1897 † (unaccepted, new combination)
Species Helix menkeana L. Pfeiffer, 1842 (unaccepted, original combination)
Species Helix meobambensis L. Pfeiffer, 1857 (unaccepted, original combination)
Species Helix merarcha Mabille, 1888 (unaccepted, original combination)
Species Helix mercatorina Mabille, 1887 (unaccepted, junior synonym)
Species Helix merguiensis Philippi, 1847 (unaccepted, junior synonym)
Species Helix merziana L. Pfeiffer, 1853 (unaccepted, original combination)
Species Helix mespillum Megerle von Mühlfeld, 1824 (unaccepted, basionym)
Species Helix meta L. Pfeiffer, 1856 (unaccepted, original combination)
Species Helix metcalfei Pfeiffer, 1845 (unaccepted, original combination)
Species Helix metula Crosse, 1870 (unaccepted, junior synonym)
Species Helix meyeri Kobelt, 1894 (unaccepted, original combination)
Species Helix miara Mabille, 1887 (unaccepted, original combination)
Species Helix mica Morelet, 1879 (unaccepted, original combination)
Species Helix michaudi Deshayes, 1832 (unaccepted, original combination)
Species Helix micra Morelet, 1882 (unaccepted, invalid: junior primary homonym of Helix micra d'Orbigny, 1835; Euconulus crami is a replacement name)
Species Helix micra d'Orbigny, 1835 (unaccepted, original combination)
Species Helix microdonta Deshayes, 1832 (unaccepted, junior synonym)
Species Helix microphis Crosse, 1868 (unaccepted, original combination)
Species Helix microscopica F. Krauss, 1848 (unaccepted, original combination)
Species Helix microsoma Morelet, 1883 (unaccepted, original combination)
Species Helix microundulata Suter, 1890 (unaccepted, original combination)
Species Helix migratoria Pfeiffer, 1855 (unaccepted, original combination)
Species Helix miguelinus L. Pfeiffer, 1856 (unaccepted, original combination)
Species Helix miliacea Martens, 1867 (unaccepted, replacement name for Helix milium Martens, 1864)
Species Helix miliaris Morelet, 1888 (unaccepted)
Species Helix militaris L. Pfeiffer, 1855 (unaccepted, junior synonym)
Species Helix milium Morse, 1859 (unaccepted)
Species Helix milium Martens, 1864 (unaccepted, invalid: junior homonym of Helix milium Morse, 1859)
Species Helix millestriata E. A. Smith, 1874 (unaccepted, original combination)
Species Helix millicentae Cox, 1871 (unaccepted, junior synonym)
Species Helix mimosa Petterd, 1879 (unaccepted, original combination)
Species Helix mindaiensis Bock, 1881 (unaccepted, original combination)
Species Helix minuscula A. Binney, 1840 (unaccepted)
Species Helix minuta Say, 1817 (unaccepted)
Species Helix minutissima I. Lea, 1841 (unaccepted, original combination)
Species Helix minutula Crosse, 1870 (unaccepted, original combination)
Species Helix misella Férussac, 1821 (unaccepted, original combination)
Species Helix miser Cox, 1873 (unaccepted, junior synonym)
Species Helix mitchellae Cox, 1864 (unaccepted, original combination)
Species Helix mitchelliana I. Lea, 1838 (unaccepted)
Species Helix mitis L. Pfeiffer, 1863 (unaccepted, original combination)
Species Helix mobiliana I. Lea, 1841 (unaccepted)
Species Helix modesta L. Pfeiffer, 1848 (unaccepted, junior synonym)
Species Helix modicella Deshayes, 1840 (unaccepted, original combination)
Species Helix modiola Férussac, 1821 (unaccepted, original combination)
Species Helix moduloides Vinassa de Regny, 1896 † (unaccepted, new combination)
Species Helix molliseta L. Pfeiffer, 1863 (unaccepted, original combination)
Species Helix monacha Pfeiffer, 1859 (unaccepted, original combination)
Species Helix monacha Mabille, 1884 (unaccepted, original combination)
Species Helix mongolica Möllendorff, 1881 (unaccepted, original combination)
Species Helix monilia Deshayes, 1863 † (unaccepted, new combination)
Species Helix monodon A. Férussac, 1807 (unaccepted, original combination)
Species Helix monodon Rackett, 1821 (unaccepted)
Species Helix monrovia Rang, 1831 (unaccepted, original combination)
Species Helix montrouzieri Souverbie, 1858 (unaccepted, original combination)
Species Helix montserratensis Hidalgo, 1870 (unaccepted, original combination)
Species Helix mora Gray in Griffith & Pidgeon, 1833 (unaccepted, original combination)
Species Helix mordax Shuttleworth, 1852 (unaccepted, original combination)
Species Helix morleti Dautzenberg & d'Hamonville, 1887 (unaccepted, original combination)
Species Helix mormonum L. Pfeiffer, 1857 (unaccepted)
Species Helix moroguesi Brongniart, 1810 † (unaccepted, new combination)
Species Helix morosa Morelet, 1853 (unaccepted, original combination)
Species Helix morroensis Hemphill, 1911 (unaccepted)
Species Helix morsei Tryon, 1865 (unaccepted, replacement name)
Species Helix mortilleti L. Pfeiffer, 1859 (unaccepted, original combination)
Species Helix mortoni Jeffreys, 1830 (unaccepted)
Species Helix morula Hildalgo, 1870 (unaccepted, replacement name for Helix martinii Bernardi, 1858 non Pfeiffer, 1854)
Species Helix motacilla Pfeiffer, 1855 (unaccepted, original combination)
Species Helix mouensis Crosse, 1868 (unaccepted, original combination)
Species Helix mouhoti Reeve, 1860 (unaccepted, invalid: junior homonym of Helix mouhoti L. Pfeiffer, 1860; Helix cambojiensis is a replacement name)
Species Helix moupiniana Deshayes, 1870 (unaccepted, original combination)
Species Helix mozambicensis L. Pfeiffer, 1855 (unaccepted, original combination)
Species Helix mucida Pfeiffer, 1857 (unaccepted, original combination)
Species Helix mucosa Cox, 1868 (unaccepted, original combination)
Species Helix mucosa W. T. Blanford & H. F. Blanford, 1861 (unaccepted, original combination)
Species Helix mucronata Möllendorff, 1887 (unaccepted, original combination)
Species Helix mucronata L. Pfeiffer, 1854 (unaccepted, junior synonym)
Species Helix mucronata Klein, 1846 † (unaccepted, junior synonym)
Species Helix muehlfeldtiana Rossmässler, 1837 (unaccepted, junior synonym)
Species Helix mulgoae Cox, 1868 (unaccepted, junior synonym)
Species Helix mullani Bland & J. G. Cooper, 1862 (unaccepted)
Species Helix multicostata Thomä, 1845 † (unaccepted, new combination)
Species Helix multidentata A. Binney, 1840 (unaccepted)
Species Helix multilimbata Hombron & Jacquinot, 1854 (unaccepted)
Species Helix multilineata Say, 1821 (unaccepted)
Species Helix multisulcata Gassies, 1857 (unaccepted, junior synonym)
Species Helix munda Benson, 1850 (unaccepted, invalid; junior homonym of Helix munda Adams, 1849; Helic cerea Pfeiffer, 1851 (preoccupied) and Helix cosmia Pfeiffer, 1852 are replacement names)
Species Helix munieri Deshayes, 1863 † (unaccepted, new combination)
Species Helix murata Heude, 1885 (unaccepted, original combination)
Species Helix murphyi Cox, 1864 (unaccepted, original combination)
Species Helix murrayana L. Pfeiffer, 1864 (unaccepted, original combination)
Species Helix mutica Morelet, 1882 (unaccepted, original combination)
Species Helix myomphala Martens, 1865 (unaccepted, original combination)
Species Helix mysolensis L. Pfeiffer, 1863 (unaccepted, original combination)
Species Helix nacimientensis White, 1886 † (unaccepted, new combination)
Species Helix nagporensis L. Pfeiffer, 1860 (unaccepted, original combination)
Species Helix namoiensis Cox, 1868 (unaccepted)
Species Helix nana A. Braun in Walchner, 1851 † (unaccepted, new combination)
Species Helix naninoides Benson, 1842 (unaccepted, junior synonym)
Species Helix naninopsis Filhol, 1877 † (unaccepted, new combination)
Species Helix narzanensis Krynicki, 1836 (unaccepted, original combination)
Species Helix naso Martens, 1883 (unaccepted, original combination)
Species Helix nasuta Metcalfe, 1852 (unaccepted, original combination)
Species Helix natalensis L. Pfeiffer, 1846 (unaccepted, original combination)
Species Helix naticoides Draparnaud, 1801 (unaccepted, junior synonym)
Species Helix nautiloidea Cox, 1866 (unaccepted, original combination)
Species Helix navariensis L. Pfeiffer, 1848 (unaccepted, junior synonym)
Species Helix navicula J. A. Wagner, 1827 (unaccepted, original combination)
Species Helix navigatorum Reeve, 1854 (unaccepted, junior synonym)
Species Helix navigatorum Pfeiffer, 1855 (unaccepted, invalid: junior homonym of Helix navigatorum Reeve, 1854)
Species Helix nayliesi Michaud, 1855 † (unaccepted, new combination)
Species Helix neglecta Draparnaud, 1805 (unaccepted, original combination)
Species Helix neherensis Benson, 1864 (unaccepted, original combination)
Species Helix nemoralis Linnaeus, 1758 (unaccepted, new combination)
Species Helix nemoralites Boubée, 1831 † (unaccepted, original combination)
Species Helix nemoraloides C.B. Adams, 1845 (unaccepted, original combination)
Species Helix nemorensis O. F. Müller, 1774 (unaccepted)
Species Helix neogranadensis L. Pfeiffer, 1848 (unaccepted, corrected spelling for 'H. neogranatensis')
Species Helix neogranatensis L. Pfeiffer, 1845 (unaccepted, original combination; inadvertent error for 'neogranadensis')
Species Helix neptunus L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix neritina Gmelin, 1791 (unaccepted)
Species Helix neritoidea Linnaeus, 1758 (unaccepted, original combination)
Species Helix neritoidea Gmelin, 1791 (unaccepted, dubious synonym)
Species Helix neumayri Brusina, 1878 † (unaccepted, new combination)
Species Helix newberryana W. G. Binney, 1858 (unaccepted)
Species Helix niciensis Férussac, 1821 (unaccepted, original combination)
Species Helix nickliniana I. Lea, 1838 (unaccepted)
Species Helix nicolavi Noulet, 1854 † (unaccepted, new combination)
Species Helix nigrilabris Martens, 1869 (unaccepted)
Species Helix nigrofasciata Pfeiffer, 1864 (unaccepted, original combination)
Species Helix nilagirica Pfeiffer, 1846 (unaccepted, original combination)
Species Helix nimbosa Crosse, 1868 (unaccepted, junior synonym)
Species Helix nipponensis Kobelt, 1876 (unaccepted, junior synonym)
Species Helix nitefacta Bourguignat in Péchaud, 1883 (unaccepted, junior synonym)
Species Helix nitella Morelet, 1851 (unaccepted, original combination)
Species Helix nitida O. F. Müller, 1774 (unaccepted, original combination)
Species Helix nitidula Draparnaud, 1805 (unaccepted, original combination)
Species Helix nivariae Wollaston, 1878 (unaccepted, original combination)
Species Helix nodifera L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix normalis Pease, 1864 (unaccepted, original combination)
Species Helix norodomiana Morlet, 1883 (unaccepted, original combination)
Species Helix nostrandiae Crosse, 1876 (unaccepted)
Species Helix notata Deshayes, 1830 (unaccepted)
Species Helix noueli Deshayes, 1863 † (unaccepted, new combination)
Species Helix nouleti Matheron in Heer, 1861 † (unaccepted, new combination)
Species Helix noumeensis Crosse, 1870 (unaccepted, original combination)
Species Helix novacula E. von Martens, 1879 (unaccepted, junior synonym)
Species Helix novaegeorgiensis Cox, 1870 (unaccepted, original combination)
Species Helix novare L. Pfeiffer, 1862 (unaccepted)
Species Helix noverca L. Pfeiffer, 1853 (unaccepted, original combination)
Species Helix novoguineensis L. Pfeiffer, 1863 (unaccepted, original rank)
Species Helix nucleus Deshayes (unaccepted, original combination)
Species Helix nucleus Gmelin, 1791 (unaccepted, original combination)
Species Helix nullarborica Tate, 1880 (unaccepted, original combination)
Species Helix nummulina A. Braun in Walchner, 1851 † (unaccepted, junior synonym)
Species Helix nupera Brazier, 1875 (unaccepted, junior synonym)
Species Helix nutans Megerle von Mühlfeld, 1824 (unaccepted)
Species Helix nuttalliana I. Lea, 1838 (unaccepted)
Species Helix obconica Pease, 1864 (unaccepted, original combination)
Species Helix obeliscus Moricand, 1834 (unaccepted, original combination)
Species Helix obliquirugosa E.A. Smith, 1894 (unaccepted, original combination)
Species Helix obnubila Reeve, 1852 (unaccepted)
Species Helix obolus Gould, 1846 (unaccepted, original combination)
Species Helix obscurata A. Adams & Reeve, 1850 (unaccepted, original combination)
Species Helix obstricta Say, 1821 (unaccepted)
Species Helix obstructa L. Pfeiffer, 1842 (unaccepted, original combination)
Species Helix obstructa Heude, 1882 (unaccepted)
Species Helix obtusata Rossmässler, 1837 (unaccepted, junior synonym)
Species Helix obtusata Gmelin, 1791 (unaccepted, original combination)
Species Helix obvoluta O. F. Müller, 1774 (unaccepted, original combination)
Species Helix occlusa F.E. Edwards, 1852 † (unaccepted, new combination)
Species Helix occulta L. Pfeiffer, 1861 (unaccepted, original combination)
Species Helix octona Linnaeus, 1767 (unaccepted, in part)
Species Helix oculuscommunis Gmelin, 1791 (unaccepted)
Species Helix odontina Morelet, 1851 (unaccepted, original combination)
Species Helix oglei Godwin-Austen, 1879 (unaccepted, original combination)
Species Helix olivieri Rossmässler, 1837 (unaccepted, junior synonym)
Species Helix olla Serres, 1844 † (unaccepted, junior synonym)
Species Helix olympica Roth, 1855 (unaccepted, original combination)
Species Helix omicron Pfeiffer, 1851 (unaccepted, original combination)
Species Helix omphalion Benson, 1864 (unaccepted, synonym)
Species Helix omphalodes L. Pfeiffer, 1845 (unaccepted, original combination)
Species Helix omphalus F.E. Edwards, 1852 † (unaccepted)
Species Helix onestera Mabille, 1887 (unaccepted, original combination)
Species Helix oomorpha Mabille, 1884 (unaccepted, junior synonym)
Species Helix opanica Anton, 1838 (unaccepted, incorrect original spelling)
Species Helix oparica Anton, 1838 (unaccepted, original combination)
Species Helix ophelia L. Pfeiffer, 1855 (unaccepted)
Species Helix ophiria L. Pfeiffer, 1856 (unaccepted, junior synonym)
Species