1. Species Nautilus balcombense Chapman, 1915 †
2. Species Nautilus butonensis K. Martin, 1933 †
3. Species Nautilus campbelli Meek, 1861 †
4. Species Nautilus forbesi d'Archiac & Haime, 1854 †
5. Species Nautilus javanus K. Martin, 1879 †
6. Species Nautilus macromphalus G. B. Sowerby II, 1849
7. Species Nautilus pompilius Linnaeus, 1758
8. Species Nautilus praepompilius Shimansky, 1957 †
9. Species Nautilus samoaensis Barord, Combosch, Giribet, Landman, Lemer, Veloso & Ward, 2023
10. Species Nautilus stenomphalus G. B. Sowerby II, 1849
11. Species Nautilus vanuatuensis Barord, Combosch, Giribet, Landman, Lemer, Veloso & Ward, 2023
12. Species Nautilus vitiensis Barord, Combosch, Giribet, Landman, Lemer, Veloso & Ward, 2023
13. Species Nautilus acicula de Wulfen, 1791 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
14. Species Nautilus acutus Hauer, 1846 † (uncertain > unassessed)
15. Species Nautilus alumnus Iredale, 1944 (uncertain > nomen dubium)
16. Species Nautilus ambiguus G. B. Sowerby II, 1849 (uncertain > nomen dubium)
17. Species Nautilus ammoni Loesch, 1914 † (uncertain > unassessed)
18. Species Nautilus argoviensis Loesch, 1914 † (uncertain > unassessed)
19. Species Nautilus aturi Basterot, 1825 † (uncertain > unassessed)
20. Species Nautilus balcombensis F. Chapman, 1915 † (uncertain > unassessed)
21. Species Nautilus belauensis Saunders, 1981 (uncertain > taxon inquirendum)
22. Species Nautilus bicarinatus Montagu, 1808 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
23. Species Nautilus bodeni Loesch, 1914 † (uncertain > unassessed)
24. Species Nautilus bordae Grateloup, 1827 † (uncertain > unassessed)
25. Species Nautilus bradfordensis Crick, 1898 † (uncertain > unassessed)
26. Species Nautilus brevior Mojsisovics, 1873 † (uncertain > unassessed)
27. Species Nautilus brevis Hauer, 1860 † (uncertain > unassessed)
28. Species Nautilus brunhuberi Loesch, 1914 † (uncertain > unassessed)
29. Species Nautilus bullatus Mojsisovics, 1873 † (uncertain > unassessed)
30. Species Nautilus bulogensis Hauer, 1888 † (uncertain > unassessed)
31. Species Nautilus cantabrigiensis Foord, 1891 † (uncertain > taxon inquirendum)
32. Species Nautilus carinatulus G. Walker & Jacob, 1798 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
33. Species Nautilus carinatus Grateloup, 1827 † (uncertain > unassessed)
34. Species Nautilus chesterensis F. B. Meek & Worthen, 1861 † (uncertain > unassessed)
35. Species Nautilus crassisinuatus Crick, 1898 † (uncertain > unassessed)
36. Species Nautilus decoratus E. T. Cox, 1857 † (uncertain > unassessed)
37. Species Nautilus deluci d'Archiac, 1850 † (uncertain > unassessed)
38. Species Nautilus depressus Binkhorst, 1861 † (uncertain > unassessed, invalid; not Eichwald, 1840)
39. Species Nautilus dissimilis W. Turton, 1819 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
40. Species Nautilus domeykus A. d'Orbigny, 1843 † (uncertain > unassessed)
41. Species Nautilus dorsatus F. A. Roemer, 1836 † (uncertain > unassessed)
42. Species Nautilus eccentricus F. B. Meek & Hayden, 1858 † (uncertain > unassessed)
43. Species Nautilus ehrlichi Mojsisovics, 1873 † (uncertain > unassessed)
44. Species Nautilus entrochus Schroeder, 1803 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
45. Species Nautilus eugyrus Mojsisovics, 1873 † (uncertain > unassessed)
46. Species Nautilus evolutus Mojsisovics, 1873 † (uncertain > unassessed)
47. Species Nautilus falcifer F. A. Roemer, 1852 † (uncertain > unassessed)
48. Species Nautilus fascia Linnaeus, 1758 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
49. Species Nautilus ferratus E. T. Cox, 1857 † (uncertain > unassessed)
50. Species Nautilus fischeranus Foord & Crick, 1890 † (uncertain > unassessed)
51. Species Nautilus fischeri Mojsisovics, 1873 † (uncertain > unassessed)
52. Species Nautilus fuscus Crick, 1898 † (uncertain > unassessed)
53. Species Nautilus galeatus Mojsisovics, 1873 † (uncertain > unassessed)
54. Species Nautilus glaber Foord & Crick, 1890 † (uncertain > unassessed)
55. Species Nautilus granum Linnaeus, 1758 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
56. Species Nautilus guembeli Mojsisovics, 1873 † (uncertain > unassessed)
57. Species Nautilus hallidayi Waring, 1914 † (uncertain > unassessed)
58. Species Nautilus haloricus Mojsisovics, 1873 † (uncertain > unassessed)
59. Species Nautilus heberti Binkhorst, 1861 † (uncertain > unassessed)
60. Species Nautilus helicites Gmelin, 1791 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
61. Species Nautilus helveticus Loesch, 1914 † (uncertain > unassessed)
62. Species Nautilus hendersoni Etheridge, 1892 † (uncertain > unassessed)
63. Species Nautilus hoeninghausii Grateloup, 1827 † (uncertain > unassessed)
64. Species Nautilus impendens Crick, 1898 † (uncertain > unassessed)
65. Species Nautilus inaequalis Gmelin, 1791 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
66. Species Nautilus jumarensis W. Waagen, 1873 † (uncertain > unassessed)
67. Species Nautilus kellneri Hauer, 1888 † (uncertain > unassessed)
68. Species Nautilus klebelsbergi Loesch, 1914 † (uncertain > unassessed)
69. Species Nautilus laubei Mojsisovics, 1873 † (uncertain > unassessed)
70. Species Nautilus lehardyi Binkhorst, 1861 † (uncertain > unassessed)
71. Species Nautilus littoreus de Wulfen, 1791 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
72. Species Nautilus major Forsskål, 1775 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
73. Species Nautilus marisrubri Schröter, 1803 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
74. Species Nautilus matheronianus A. d'Orbigny, 1841 † (uncertain > unassessed)
75. Species Nautilus mjatschkowanus Loesch, 1914 † (uncertain > unassessed)
76. Species Nautilus modestus Mojsisovics, 1873 † (uncertain > unassessed)
77. Species Nautilus moretoni Willey, 1896 (uncertain > taxon inquirendum)
78. Species Nautilus navicularis de Wulfen, 1791 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
79. Species Nautilus noricus Mojsisovics, 1873 † (uncertain > unassessed)
80. Species Nautilus nubari Cossmann, 1901 † (uncertain > unassessed)
81. Species Nautilus obtusus Mojsisovics, 1873 † (uncertain > unassessed)
82. Species Nautilus orbicularis F. A. Roemer, 1843 † (uncertain > unassessed)
83. Species Nautilus ornatus Foord & Crick, 1890 † (uncertain > unassessed)
84. Species Nautilus orthoceratites Schröter, 1803 (uncertain > nomen dubium, Foraminifer erroneously described in a mollusc genus Never figured+Depository not given)
85. Species Nautilus perarmatus Mojsisovics, 1873 † (uncertain > unassessed)
86. Species Nautilus perezi Bellardi, 1852 † (uncertain > unassessed)
87. Species Nautilus perinflatus Foord & Crick, 1890 † (uncertain > unassessed)
88. Species Nautilus pichleri Hauer, 1866 † (uncertain > unassessed)
89. Species Nautilus planatus F. A. Roemer, 1850 † (uncertain > unassessed, junior homonym of Nautilus planatus Fichtel & Moll, 1798 (which actually belongs in Foraminifera))
90. Species Nautilus planci de Wulfen, 1791 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
91. Species Nautilus planilateratus Hauer, 1860 † (uncertain > unassessed)
92. Species Nautilus planorbiformis F. B. Meek & Worthen, 1861 † (uncertain > unassessed)
93. Species Nautilus polytrichus F. A. Roemer, 1843 † (uncertain > unassessed)
94. Species Nautilus popmonius Billings, 1862 † (uncertain > unassessed)
95. Species Nautilus pseudolineatus Foord & Crick, 1890 † (uncertain > unassessed)
96. Species Nautilus rectus Montagu, 1803 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
97. Species Nautilus repertus Iredale, 1944 (uncertain > taxon inquirendum)
98. Species Nautilus reticulatus Hauer, 1846 † (uncertain > unassessed)
99. Species Nautilus rhodani Roux, 1847 † (uncertain > taxon inquirendum)
100. Species Nautilus robustus Foord & Crick, 1890 † (uncertain > unassessed)
101. Species Nautilus roemeri Loesch, 1914 † (uncertain > unassessed)
102. Species Nautilus rogeri Loesch, 1914 † (uncertain > unassessed)
103. Species Nautilus rollandi Leymerie, 1846 † (uncertain > unassessed)
104. Species Nautilus rollieri Loesch, 1914 † (uncertain > unassessed)
105. Species Nautilus romeroi Ihering, 1903 † (uncertain > unassessed)
106. Species Nautilus rotatus Maton & Rackett, 1807 (uncertain > taxon inquirendum)
107. Species Nautilus rugosus Linnaeus, 1767 (uncertain > taxon inquirendum)
108. Species Nautilus scapha de Wulfen, 1791 (uncertain > nomen dubium, no type figure+depository not given = Nomen dubium, foraminifer erroneously described in a mollusc genus Senior homonym of Nautilus scapha Fichtel & Moll, 1798)
109. Species Nautilus sceptrum Schroeder, 1803 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
110. Species Nautilus schloenbachi Mojsisovics, 1873 † (uncertain > unassessed)
111. Species Nautilus schlosseri Loesch, 1914 † (uncertain > unassessed)
112. Species Nautilus schlotheimi Loesch, 1914 † (uncertain > unassessed)
113. Species Nautilus schneidi Loesch, 1914 † (uncertain > unassessed)
114. Species Nautilus schwertschlageri Loesch, 1914 † (uncertain > unassessed)
115. Species Nautilus semiornatus Crick, 1898 † (uncertain > unassessed)
116. Species Nautilus sertum de Wulfen, 1791 (uncertain > nomen dubium, no type figure+depository not given = Nomen dubium, foraminifer erroneously described in a mollusc genus)
117. Species Nautilus simillimus Foord & Crick, 1890 † (uncertain > unassessed)
118. Species Nautilus sinuosus F. A. Roemer, 1836 † (uncertain > unassessed)
119. Species Nautilus smithi Foord & Crick, 1890 † (uncertain > unassessed)
120. Species Nautilus striatulus Schroeder, 1803 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
121. Species Nautilus stromeri Loesch, 1914 † (uncertain > unassessed)
122. Species Nautilus styriacus Mojsisovics, 1873 † (uncertain > unassessed)
123. Species Nautilus subaratus Keyserling, 1848 † (uncertain > unassessed)
124. Species Nautilus subglobosus F. B. Meek & Worthen, 1861 † (uncertain > unassessed)
125. Species Nautilus suessi Mojsisovics, 1873 † (uncertain > unassessed)
126. Species Nautilus sypho Grateloup, 1827 † (uncertain > unassessed)
127. Species Nautilus taiwanus (T. Huang, 2002) † (uncertain > nomen dubium)
128. Species Nautilus trapezoidalis Hauer, 1860 † (uncertain > unassessed)
129. Species Nautilus triadicus Mojsisovics, 1873 † (uncertain > unassessed)
130. Species Nautilus trisulcatus F. B. Meek & Worthen, 1861 † (uncertain > unassessed)
131. Species Nautilus tubingensis Loesch, 1914 † (uncertain > unassessed)
132. Species Nautilus umbilicatus Linnaeus, 1758 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
133. Species Nautilus vaelsensis Binkhorst, 1861 † (uncertain > unassessed)
134. Species Nautilus washitanus Cragin, 1895 † (uncertain > unassessed)
135. Subgenus Nautilus (Discites) McCoy, 1844 † accepted as Discites McCoy, 1844 † accepted as Discitoceras Hyatt, 1884 † (unaccepted > superseded rank)
     1. Species Nautilus (Discites) disciformis Meek & Worthen, 1865 † accepted as Aphelaeceras disciforme (Meek & Worthen, 1865) † (unaccepted > superseded combination)
     2. Species Nautilus (Discites) discors McCoy, 1844 † accepted as Maccoyoceras discors (McCoy, 1844) † (unaccepted > superseded combination)
     3. Species Nautilus (Discites) latidorsatus McCoy, 1844 † accepted as Mesochasmoceras latidorsatum (McCoy, 1844) † (unaccepted > superseded combination)
     4. Species Nautilus (Discites) nodiferus J. Armstrong, 1866 † accepted as Tylonautilus nodiferus (J. Armstrong, 1866) † (unaccepted > superseded combination)
     5. Species Nautilus (Discites) planotergatus McCoy, 1844 † accepted as Epidomatoceras planotergatus (McCoy, 1844) † (unaccepted > superseded combination)
136. Subgenus Nautilus (Discus) W. King, 1844 † accepted as Discus W. King, 1844 † accepted as Trematodiscus F. B. Meek & Worthen, 1861 † (unaccepted > superseded rank)
     1. Species Nautilus (Discus) sangamonensis F. B. Meek & Worthen, 1861 † represented as Nautilus sangamonensis F. B. Meek & Worthen, 1861 † accepted as Metacoceras sangamonense (F. B. Meek & Worthen, 1861) †
137. Subgenus Nautilus (Endolobus) Meek & Worthen, 1865 † accepted as Endolobus F. B. Meek & Worthen, 1865 † (unaccepted > superseded rank)
     1. Species Nautilus (Endolobus) peramplus Meek & Worthen, 1865 † accepted as Endolobus spectabilis (Meek & Worthen, 1861) † (unaccepted > junior subjective synonym)
     2. Species Nautilus (Endolobus) spectabilis Meek & Worthen, 1861 † accepted as Endolobus spectabilis (Meek & Worthen, 1861) † (unaccepted > superseded combination)
138. Subgenus Nautilus (Javanoceras) K. Martin, 1932 † accepted as Cimomia Conrad, 1866 †
     1. Species Nautilus (Javanoceras) intuscatenatus K. Martin, 1932 † accepted as Cimomia intuscatenata (K. Martin, 1932) †
139. Subgenus Nautilus (Menuthionautilus) Collignon, 1933 † accepted as Menuthionautilus Collignon, 1933 † (unaccepted > superseded rank)
140. Subgenus Nautilus (Orthoceras) Bruguière, 1789 † accepted as Orthoceras Bruguière, 1789 † (unaccepted > superseded rank)
     1. Species Nautilus (Orthoceras) comatus Batsch, 1791 accepted as Pyramidulina comata (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     2. Species Nautilus (Orthoceras) conico-articulatus Batsch, 1791 accepted as Articulina conicoarticulata (Batsch, 1791) (foraminifera not a cephalopod)
     3. Species Nautilus (Orthoceras) costatus Batsch, 1791 accepted as Marginulina costata (Batsch, 1791) accepted as Marginulinopsis costata (Batsch, 1791) (Not a mollusc but a foraminifer)
     4. Species Nautilus (Orthoceras) globiferus Batsch, 1791 accepted as Nodosaria globifera (Batsch, 1791) (Opinion of Cushman (1931))
     5. Species Nautilus (Orthoceras) harpa Batsch, 1791 accepted as Flabellina harpa (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     6. Species Nautilus (Orthoceras) leguminiformis Batsch, 1791 accepted as Dentalina leguminiformis (Batsch, 1791) accepted as Laevidentalina leguminiformis (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     7. Species Nautilus (Orthoceras) margaritiferus Batsch, 1791 accepted as Vaginulina margaritifera (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     8. Species Nautilus (Orthoceras) murex Batsch, 1791 accepted as Marginulina murex (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     9. Species Nautilus (Orthoceras) obliquatus Batsch, 1791 accepted as Pyramidulina obliquata (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     10. Species Nautilus (Orthoceras) pennatula Batsch, 1791 accepted as Vulvulina pennatula (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     11. Species Nautilus (Orthoceras) radicula Batsch, 1791 accepted as Nodosaria batschi Thalmann, 1934 (Primary junior homonym of Nautilus radicula Linnaeus, 1758 and foraminifer erroneously described in a mollusc genus)
     12. Species Nautilus (Orthoceras) scalaris Batsch, 1791 accepted as Amphicoryna scalaris (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     13. Species Nautilus (Orthoceras) vaginaeformis Batsch, 1791 accepted as Lingulina vaginaeformis (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     14. Species Nautilus (Orthoceras) vertebralis Batsch, 1791 accepted as Dentalina vertebralis (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
141. Subgenus Nautilus (Solenochilus) F. B. Meek & Worthen, 1870 † accepted as Solenochilus F. B. Meek & Worthen, 1870 † (unaccepted > superseded rank)
     1. Species Nautilus (Solenochilus) collectus F. B. Meek & Worthen, 1870 † (uncertain > unassessed)
142. Subgenus Nautilus (Temnocheilus) F. McCoy, 1844 † accepted as Temnocheilus F. McCoy, 1844 † (unaccepted > superseded rank)
     1. Species Nautilus (Temnocheilus) crenatus F. McCoy, 1844 † (uncertain > unassessed)
     2. Species Nautilus (Temnocheilus) furcatus F. McCoy, 1844 † (uncertain > unassessed)
     3. Species Nautilus (Temnocheilus) pinguis F. McCoy, 1844 † (uncertain > unassessed)
     4. Species Nautilus (Temnocheilus) porcatus F. McCoy, 1844 † (uncertain > unassessed)
     5. Species Nautilus (Temnocheilus) suevicus E. Philippi, 1898 † (uncertain > unassessed)
     6. Species Nautilus (Temnocheilus) coronatus F. McCoy, 1844 † accepted as Temnocheilus coronatus (F. McCoy, 1844) † (unaccepted > superseded combination)
     7. Species Nautilus (Temnocheilus) niotensis Meek & Worthen, 1865 † accepted as Edaphoceras niotense (Meek & Worthen, 1865) † (unaccepted > superseded combination)
143. Subgenus Nautilus (Temnochilus) F. B. Meek & Worthen, 1870 † accepted as Temnocheilus F. McCoy, 1844 †
     1. Species Nautilus (Temnochilus) coxanus F. B. Meek & Worthen, 1870 † (uncertain > unassessed)
     2. Species Nautilus (Temnochilus) winslowi F. B. Meek & Worthen, 1870 † (uncertain > taxon inquirendum)
     3. Species Nautilus (Temnochilus) latus F. B. Meek & Worthen, 1870 † accepted as Latitemnocheilus latus (F. B. Meek & Worthen, 1870) † (unaccepted > superseded combination)
144. Subgenus Nautilus (Thrincoceras) Hyatt, 1893 † accepted as Thrincoceras Hyatt, 1893 † (unaccepted > superseded rank)
     1. Species Nautilus (Thrincoceras) uralicum Frederiks, 1915 † accepted as Neothrincoceras uralicum (Frederiks, 1915) † (unaccepted > superseded combination)
145. Subgenus Nautilus (Trematodiscus) F. B. Meek & Worthen, 1861 † accepted as Trematodiscus F. B. Meek & Worthen, 1861 † (unaccepted > superseded rank)
146. Subgenus Nautilus (Trocholites) Conrad, 1838 † accepted as Trocholites Conrad, 1838 † (unaccepted > superseded rank)
     1. Species Nautilus (Trocholites) scoticus Blake, 1882 † accepted as Curtoceras scoticus (Blake, 1882) † (unaccepted > superseded combination)
147. Species Nautilus acanthicus Tzwetaev, 1888 † accepted as Temnocheiloides acanthicus (Tzwetaev, 1888) † (unaccepted > superseded combination)
148. Species Nautilus acicularis Batsch, 1791 accepted as Monalysidium acicularis (Batsch, 1791) accepted as Monalysidium aciculare (Batsch, 1791) (unaccepted > superseded combination, foraminifer erroneously described in a mollusc genus)
149. Species Nautilus acutauricularis Fichtel & Moll, 1798 accepted as Lenticulina acutauricularis (Fichtel & Moll, 1798)
150. Species Nautilus aduncus Fichtel & Moll, 1798 accepted as Orbiculina adunca (Fichtel & Moll, 1798) accepted as Archaias angulatus (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
151. Species Nautilus aganiticus Schlotheim, 1820 † accepted as Pseudaganides aganiticus (Schlotheim, 1820) † (unaccepted > superseded combination)
152. Species Nautilus ahltenensis Schlüter, 1876 † accepted as Eutrephoceras ahltenense (Schlüter, 1876) † (unaccepted > superseded combination)
153. Species Nautilus allani C. A. Fleming, 1945 † accepted as Eutrephoceras allani (C. A. Fleming, 1945) † (superseded combination)
154. Species Nautilus altidorsalis Winchell, 1862 † accepted as Vestinautilus altidorsalis (Winchell, 1862) † (unaccepted > superseded combination)
155. Species Nautilus altifrons F. Chapman, 1915 † accepted as Eutrephoceras altifrons (F. Chapman, 1915) † (unaccepted > superseded combination)
156. Species Nautilus ambiguus Fichtel & Moll, 1798 accepted as Dendritina ambigua (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
157. Species Nautilus ammonoides Gronovius, 1781 accepted as Operculina ammonoides (Gronovius, 1781) (foraminifer erroneously described in a mollusc genus)
158. Species Nautilus ampezzanus Loretz, 1875 † accepted as Anoploceras ampezzanum (Loretz, 1875) † (unaccepted > superseded combination)
159. Species Nautilus angulatus Fichtel & Moll, 1798 accepted as Archaias angulatus (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
160. Species Nautilus anomalus Barrande, 1865 † accepted as Anomaloceras anomalum (Barrande, 1865) † (unaccepted > superseded combination)
161. Species Nautilus applanatus Zittel, 1902 † accepted as Pseudocenoceras applanatum (Zittel, 1902) † (unaccepted > superseded combination)
162. Species Nautilus araucanus R. A. Philippi, 1887 † accepted as Aturia cubaensis (I. Lea, 1841) † (unaccepted > junior subjective synonym, nomen nudum)
163. Species Nautilus archiacianus A. d'Orbigny, 1840 † accepted as Pseudocenoceras archiacianum (A. d'Orbigny, 1840) † (unaccepted > superseded combination)
164. Species Nautilus arietinus Batsch, 1791 accepted as Coscinospira arietina (Batsch, 1791) accepted as Peneroplis arietinus (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
165. Species Nautilus armeniacus Abich, 1878 † accepted as Pseudotitanoceras armeniacum (Abich, 1878) † (unaccepted > superseded combination)
166. Species Nautilus asterianus A. d'Orbigny, 1850 † accepted as Eutrephoceras asterianum (d'Orbigny, 1850) † (unaccepted > superseded combination)
167. Species Nautilus asterizans Fichtel & Moll, 1798 accepted as Hanzawaia asterizans (Fichtel & Moll, 1798) accepted as Riminopsis asterizans (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
168. Species Nautilus auricula Fichtel & Moll, 1798 accepted as Cancris auricula (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
169. Species Nautilus avonensis J. W. Dawson, 1868 † accepted as Diodoceras avonense (J. W. Dawson, 1868) † (unaccepted > superseded combination)
170. Species Nautilus balthicus Schröter, 1791 accepted as Hyalinea balthica (Schröter, 1783) (Not a mollusc but a foraminifer)
171. Species Nautilus balthicus Schröter, 1783 accepted as Hyalinea balthica (Schröter, 1783) (foraminifer erroneously described in a mollusc genus Type species of Hyalinea)
172. Species Nautilus baluchistanensis Spengler, 1910 † accepted as Eutrephoceras charpentieri (Leymerie, 1851) † (unaccepted > junior subjective synonym)
173. Species Nautilus beccarii Linnaeus, 1758 accepted as Ammonia beccarii (Linnaeus, 1758) (foraminifer erroneously described in a mollusc genus)
174. Species Nautilus bellerophon Lundgren, 1867 † accepted as Eutrephoceras bellerophon (Lundgren, 1867) † (unaccepted > superseded combination)
175. Species Nautilus berriasensis Pictet, 1867 † accepted as Pseudocenoceras berriasense (Pictet, 1867) † (unaccepted > junior subjective synonym)
176. Species Nautilus biangulatus J. de C. Sowerby, 1825 † accepted as Vestinautilus biangulatus (J. de C. Sowerby, 1825) † (unaccepted > superseded combination)
177. Species Nautilus biangulatus A. d'Orbigny, 1843 † accepted as Nautilus subbiangulatus A. d'Orbigny, 1850 † accepted as Pseudaganides subbiangulatus (A. d'Orbigny, 1850) † (unaccepted > junior homonym, invalid: junior homonym of Nautilus biangulatus J. De C. Sowerby, 1824; N. subbiangulatus is a replacement name)
178. Species Nautilus bidorsatus Schlotheim, 1832 † accepted as Germanonautilus bidorsatus (Schlotheim, 1832) † (unaccepted > superseded combination)
179. Species Nautilus blanfordianus Kilian & Reboul, 1909 † accepted as Eutrephoceras dorbignyanum (Forbes, 1846) † (unaccepted > junior subjective synonym)
180. Species Nautilus bohemicus Barrande, 1854 † accepted as Boionautilus bohemicus (Barrande, 1854) † (unaccepted > superseded combination)
181. Species Nautilus boissieri Pictet, 1866 † accepted as Eutrephoceras boissieri (Pictet, 1866) † (unaccepted > superseded combination)
182. Species Nautilus bouchardianus A. d'Orbigny, 1840 † accepted as Eutrephoceras bouchardianum (A. d'Orbigny, 1840) † (unaccepted > superseded combination)
183. Species Nautilus burtonensis Foord & Crick, 1890 † accepted as Ophionautilus burtonensis (Foord & Crick, 1890) † (unaccepted > superseded combination)
184. Species Nautilus calcar Linnaeus, 1758 accepted as Lenticulina calcar (Linnaeus, 1758) (foraminifer erroneously described in a mollusc genus)
185. Species Nautilus calloviensis Oppel, 1857 † accepted as Paracenoceras calloviense (Oppel, 1857) † (unaccepted > superseded combination)
186. Species Nautilus calvimontensis Bédé, 1948 † accepted as Angulithes calvimontensis (Bédé, 1948) † (unaccepted > superseded combination)
187. Species Nautilus campichei Karakasch, 1907 † accepted as Pseudocenoceras campichei (Karakasch, 1907) † (unaccepted > superseded combination)
188. Species Nautilus canaliculatus Eichwald, 1857 † accepted as Rineceras canaliculatum (Eichwald, 1857) † (unaccepted > superseded combination)
189. Species Nautilus canaliculatus E. T. Cox, 1857 † accepted as Coelogasteroceras coxi M. Gordon, 1960 † (unaccepted > junior homonym, of Nautilus canaliculatus Eichwald, 1857; Coelogasteroceras coxi Gordon, 1960 is a replacement name)
190. Species Nautilus carinatus Eichwald, 1857 † accepted as Rineceras carinatum (Eichwald, 1857) † (unaccepted > superseded combination)
191. Species Nautilus cariniferus J. de C. Sowerby, 1825 † accepted as Vestinautilus cariniferus (J. de C. Sowerby, 1825) † (unaccepted > superseded combination)
192. Species Nautilus caroliameghinoi Ihering, 1902 † accepted as Aturia caroliameghinoi (Ihering, 1902) † (unaccepted > superseded combination)
193. Species Nautilus cassis Fichtel & Moll, 1798 accepted as Lenticulina cassis (Fichtel & Moll, 1798) accepted as Planularia cassis (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
194. Species Nautilus catonis Gemmelaro, 1886 † accepted as Ophionautilus catonis (Gemmelaro, 1886) † (unaccepted > superseded combination)
195. Species Nautilus charpentieri Leymerie, 1851 † accepted as Eutrephoceras charpentieri (Leymerie, 1851) † (unaccepted > superseded combination)
196. Species Nautilus clarkanus Gorby, 1886 † (unaccepted > nomen nudum)
197. Species Nautilus clementinus A. d'Orbigny, 1840 † accepted as Eutrephoceras clementinum (A. d'Orbigny, 1840) † (unaccepted > superseded combination)
198. Species Nautilus columbinus Fritsch, 1872 † accepted as Cymatoceras columbinum (Fritsch, 1872) † (unaccepted > superseded combination)
199. Species Nautilus comptoni J. Sowerby, 1816 accepted as Lenticulina comptoni (Sowerby, 1816) accepted as Lenticulina rotulata (Lamarck, 1804) (foraminifer erroneously described in a mollusc genus)
200. Species Nautilus conico-articulata Batsch, 1791 accepted as Articulina conicoarticulata (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
201. Species Nautilus conicoarticulatus Batsch, 1791 † accepted as Articulina conicoarticulata (Batsch, 1791) (A foraminifer not a cephalopod)
202. Species Nautilus convergens Abich, 1878 † accepted as Domatoceras convergens (Abich, 1878) † (unaccepted > superseded combination)
203. Species Nautilus costatus Fichtel & Moll, 1798 accepted as Lenticulina costata (Fichtel & Moll, 1798) accepted as Spincterules costatus (Fichtel & Moll, 1798) accepted as Spincterules anaglyptus Loeblich & Tappan, 1987 (foraminifer erroneously described in a mollusc genus)
204. Species Nautilus costatus Montagu, 1803 accepted as Nodosaria costata (Montagu, 1803) accepted as Pyramidulina raphanus (Linnaeus, 1758) (Not a mollusc but a foraminifer)
205. Species Nautilus crassulum G. Walker & Jacob, 1798 accepted as Nonion crassulum (Walker & Jacob, 1798) (foraminifer erroneously described in a mollusc genus)
206. Species Nautilus crassulus Fichtel & Moll, 1798 accepted as Nonion crassulum (Walker & Jacob, 1798) (foraminifer erroneously described in a mollusc genus)
207. Species Nautilus crassulus G. Walker & Jacob, 1798 accepted as Nonion crassulum (Walker & Jacob, 1798)
208. Species Nautilus craticulatus Fichtel & Moll, 1798 accepted as Elphidium craticulatum (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
209. Species Nautilus crepidula Fichtel & Moll, 1798 accepted as Astacolus crepidulus (Fichtel & Moll, 1798) accepted as Astacolus crepidula (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
210. Species Nautilus crispus Linnaeus, 1758 accepted as Elphidium crispum (Linnaeus, 1758) (foraminifer erroneously described in a mollusc genus)
211. Species Nautilus crista Linnaeus, 1758 accepted as Armiger crista (Linnaeus, 1758) (unaccepted > superseded combination)
212. Species Nautilus crux Stache, 1877 † accepted as Tirolonautilus crux (Stache, 1877) † (unaccepted > superseded combination)
213. Species Nautilus cubaensis I. Lea, 1841 † accepted as Aturia cubaensis (I. Lea, 1841) † (original combination)
214. Species Nautilus darupensis Schlüter, 1876 † accepted as Eutrephoceras darupense (Schlüter, 1876) † (unaccepted > superseded combination)
215. Species Nautilus decurrens Eichwald, 1860 † accepted as Bucaniella decurrens (Eichwald, 1860) † (unaccepted > superseded combination)
216. Species Nautilus dekayi S. G. Morton, 1834 † accepted as Eutrephoceras dekayi (S. G. Morton, 1834) † (unaccepted > superseded combination)
217. Species Nautilus depressulus G. Walker & Jacob, 1798 accepted as Haynesina depressula (Walker & Jacob, 1798) (foraminifer erroneously described in a mollusc genus)
218. Species Nautilus depressus Eichwald, 1840 † accepted as Trocholites depressus (Eichwald, 1840) † (unaccepted > superseded combination)
219. Species Nautilus desertorum Douvillé, 1916 † accepted as Eutrephoceras douvillei Spath, 1927 † (unaccepted > junior homonym, invalid; not Zittel, 1902, Eutrephoceras douvillei is a replacement name)
220. Species Nautilus dietrichi Zwierzycki, 1914 † accepted as Eutrephoceras dietrichi (Zwierzycki, 1914) † (unaccepted > superseded combination)
221. Species Nautilus digonus F. B. Meek & Worthen, 1861 † accepted as Rineceras digonum (F. B. Meek & Worthen, 1861) † (unaccepted > superseded combination)
222. Species Nautilus discoidalis Winchell, 1862 † accepted as Maccoyoceras discoidale (Winchell, 1862) † (unaccepted > superseded combination)
223. Species Nautilus disculus Deshayes, 1865 † accepted as Angulithes disculus (Deshayes, 1865) † (unaccepted > superseded combination)
224. Species Nautilus d'orbignianus Forbes, 1846 † accepted as Eutrephoceras dorbignyanum (Forbes, 1846) † (unaccepted > superseded combination)
225. Species Nautilus dorsoexcavatus Parona & Bonarelli, 1895 † accepted as Paracenoceras dorsoexcavatum (Parona & Bonarelli, 1895) † (unaccepted > superseded combination)
226. Species Nautilus dorsoplicatus Abich, 1878 † accepted as Epitainoceras dorsoplicatum (Abich, 1878) † (unaccepted > superseded combination)
227. Species Nautilus erycinus Tagliarini, 1901 † accepted as Antaganides erycinus (Tagliarini, 1901) † (unaccepted > superseded combination)
228. Species Nautilus exiguus Crick, 1898 † accepted as Cenoceras exiguum (Crick, 1898) † (unaccepted > superseded combination)
229. Species Nautilus expansus J. de Carle Sowerby, 1824 † accepted as Eutrephoceras expansum (J. De C. Sowerby, 1824) † (unaccepted > superseded combination)
230. Species Nautilus faba Fichtel & Moll, 1798 accepted as Nonion fabum (Fichtel & Moll, 1798) accepted as Nonion faba (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
231. Species Nautilus farctus Fichtel & Moll, 1798 accepted as Cibicides farctus (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
232. Species Nautilus felix F. Chapman, 1915 † accepted as Cimomia felix (F. Chapman, 1915) † (unaccepted > superseded combination)
233. Species Nautilus fittoni Sharpe, 1853 † accepted as Pseudocenoceras fittoni (Sharpe, 1853) † (unaccepted > superseded combination)
234. Species Nautilus flammeus Ronchetti, 1947 † accepted as Eutrephoceras flammeum (Rochelotti, 1947) † (unaccepted > superseded combination)
235. Species Nautilus galea Fichtel & Moll, 1798 accepted as Planularia cassis (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
236. Species Nautilus geelongensis Foord, 1891 † accepted as Eutrephoceras geelongense (Foord, 1891) † (unaccepted > superseded combination)
237. Species Nautilus gemmatus Mojsisovics, 1873 † accepted as Phloioceras gemmatum (Mojsisovics, 1873) † (unaccepted > superseded combination)
238. Species Nautilus germanus J. Phillips, 1841 † accepted as Rhenomphalus germanus (J. Phillips, 1841) † (unaccepted > superseded combination)
239. Species Nautilus gizensis Forsskål, 1775 † accepted as Nummulites gizensis (Forskål in Niebuhr, 1775) † accepted as Nummulites gizehensis (Forskål in Niebuhr, 1775) †
240. Species Nautilus goliathus W. Waagen, 1879 † accepted as Foordiceras goliathum (W. Waagen, 1879) † (unaccepted > superseded combination)
241. Species Nautilus gorasdzensis Assmann, 1937 † accepted as Germanonautilus salinarius (Mojsisovics, 1882) † (unaccepted > junior subjective synonym)
242. Species Nautilus hexagonus J. de Sowerby, 1826 † accepted as Paracenoceras hexagonum (J. de Sowerby, 1826) † (unaccepted > superseded combination)
243. Species Nautilus hilseanus Weerth, 1884 † accepted as Eutrephoceras hilseanum (Weerth, 1884) † (unaccepted > superseded combination)
244. Species Nautilus holtianus Blake, 1882 † accepted as Boionautilus holtianus (Blake, 1882) † (unaccepted > superseded combination)
245. Species Nautilus incrassatus Fichtel & Moll, 1798 accepted as Anomalinoides incrassatus (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
246. Species Nautilus indicus A. d'Orbigny, 1850 † (unaccepted > superseded combination)
247. Species Nautilus inflatus Montagu, 1808 (unaccepted, foraminifer erroneously described in a mollusc genus Type species of Trochammina)
248. Species Nautilus inornatus d'Orbigny, 1842 † (unaccepted > superseded combination)
249. Species Nautilus intumescens W. Waagen, 1873 † (unaccepted > superseded combination)
250. Species Nautilus jason Billings, 1859 † (unaccepted > superseded combination)
251. Species Nautilus jugosus Montagu, 1803 (unaccepted, foraminifer erroneously described in a mollusc genus)
252. Species Nautilus julii Gueranger, 1864 † (unaccepted > superseded combination)
253. Species Nautilus justus Blanford, 1861 † (unaccepted > superseded combination)
254. Species Nautilus kelloggi Whitfield, 1886 † (unaccepted > superseded combination)
255. Species Nautilus kieslingeri Collignon, 1933 † (unaccepted > superseded combination)
256. Species Nautilus koninckii d'Orbigny, 1847 † (unaccepted > superseded combination)
257. Species Nautilus kumagunensis W. Waagen, 1873 † (unaccepted > superseded combination)
258. Species Nautilus kutchensis W. Waagen, 1873 † (unaccepted > superseded combination)
259. Species Nautilus labechei d'Archiac & Haime, 1854 † (unaccepted > junior subjective synonym)
260. Species Nautilus lacerdae Vilanova, 1870 † (unaccepted > superseded combination)
261. Species Nautilus lacustris Lightfoot, 1786 (unaccepted > junior subjective synonym, a junior synonym)
262. Species Nautilus laevigatulus G. Walker & Jacob, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
263. Species Nautilus laevigatus A. d'Orbigny, 1840 † (unaccepted > junior homonym, A junior homonym of Nautilus laevigatus Montagu, 1803)
264. Species Nautilus lallierianus A. d'Orbigny, 1841 † (unaccepted > superseded combination)
265. Species Nautilus lamarckii Deshayes, 1835 † (unaccepted > superseded combination)
266. Species Nautilus largilliertianus A. d'Orbigny, 1840 † (unaccepted > superseded combination)
267. Species Nautilus legumen Linnaeus, 1758 (unaccepted, foraminifer erroneously described in a mollusc genus)
268. Species Nautilus lenticularis Fichtel & Moll, 1798 † (unaccepted, original combination)
269. Species Nautilus lentiformis Stoliczka, 1866 † (unaccepted > superseded combination)
270. Species Nautilus linearis Montagu, 1808 (unaccepted, foraminifer erroneously described in a mollusc genus)
271. Species Nautilus lineatus d'Orbigny, 1842 † (unaccepted > superseded combination)
272. Species Nautilus lituus Gmelin, 1791 (unaccepted, foraminifer erroneously described in a mollusc genus)
273. Species Nautilus lobatulus G. Walker & Jacob, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
274. Species Nautilus lorioli Loesch, 1914 † (unaccepted > superseded combination)
275. Species Nautilus luidii Fleming, 1828 † (unaccepted > superseded combination)
276. Species Nautilus lutatii Gemmelaro, 1886 (unaccepted > superseded combination)
277. Species Nautilus macellum Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
278. Species Nautilus macellus Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
279. Species Nautilus magellanicus R. A. Philippi, 1887 † (unaccepted > junior subjective synonym, nomen nudum)
280. Species Nautilus maldonadi R. A. Philippi, 1897 † (unaccepted > junior subjective synonym)
281. Species Nautilus mammilla Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
282. Species Nautilus marucoensis Giovinne, 1950 † (unaccepted > junior subjective synonym)
283. Species Nautilus meekianus Winchell, 1862 † (unaccepted > superseded combination)
284. Species Nautilus melo Fichtel & Moll, 1798 † (unaccepted, foraminifer erroneously described in a mollusc genus)
285. Species Nautilus montmollini Pictet & Campiche, 1859 † (unaccepted > superseded combination)
286. Species Nautilus moreausus d'Orbigny, 1842 † (unaccepted > superseded combination)
287. Species Nautilus multicarinatus J. de C. Sowerby, 1825 † (unaccepted > superseded combination)
288. Species Nautilus multiseptatus Foord & Crick, 1890 † (unaccepted > superseded combination)
289. Species Nautilus natator Billings, 1859 † (unaccepted > superseded combination)
290. Species Nautilus neocomiensis d'Orbigny, 1840 † (unaccepted > superseded combination)
291. Species Nautilus obliquus Linnaeus, 1758 (unaccepted, Opinion of Eiland and Gudmundsson (2004))
292. Species Nautilus ophioneus W. Waagen, 1879 † (unaccepted > superseded combination)
293. Species Nautilus orbiculus Fichtel & Moll, 1798 † (unaccepted, New name in Lamarck (1822))
294. Species Nautilus orbiculus Forsskål, 1775 (unaccepted, foraminifer erroneously described in a mollusc genus)
295. Species Nautilus oxystomus J. Phillips, 1836 † (unaccepted > superseded combination)
296. Species Nautilus papillosus Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
297. Species Nautilus parallelus Abich, 1878 † (unaccepted > superseded combination)
298. Species Nautilus parisiensiis Deshayes, 1865 † (unaccepted > superseded combination)
299. Species Nautilus parkinsoni Edwards, 1849 † (unaccepted > superseded combination)
300. Species Nautilus pentagonus J. De C. Sowerby, 1819 † (unaccepted > superseded combination)
301. Species Nautilus perforatus Conrad, 1849 (unaccepted > superseded combination)
302. Species Nautilus perstriatus Steuer, 1897 † (unaccepted > superseded combination)
303. Species Nautilus pertusus Forsskål, 1775 (unaccepted, foraminifer erroneously described in a mollusc genus)
304. Species Nautilus pinguis de Koninck, 1844 † (unaccepted > superseded combination)
305. Species Nautilus planatus Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus. Type species of Peneroplis)
306. Species Nautilus planidorsalis Winchell, 1862 † (unaccepted > superseded combination)
307. Species Nautilus planidorsatus Portlock, 1843 † (unaccepted > superseded combination)
308. Species Nautilus pompilioides Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
309. Species Nautilus pomponius Billings, 1862 † (unaccepted > superseded combination)
310. Species Nautilus ponderosus M. S. White, 1872 † (unaccepted > superseded combination)
311. Species Nautilus pseudobouchardianus Spengler, 1910 † (unaccepted > junior subjective synonym)
312. Species Nautilus pseudoelegans A. d'Orbigny, 1840 † (unaccepted > superseded combination)
313. Species Nautilus quadrangulus McChesney, 1859 † (unaccepted > superseded combination)
314. Species Nautilus quadrilineatus Favre, 1869 † (unaccepted > superseded combination)
315. Species Nautilus radiatus Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
316. Species Nautilus radicula Linnaeus, 1758 (unaccepted, foraminifer erroneously described in a mollusc genus)
317. Species Nautilus rangei Hoppe, 1922 † (unaccepted > superseded combination)
318. Species Nautilus raphanistrum Linnaeus, 1758 (unaccepted, foraminifer erroneously described in a mollusc genus)
319. Species Nautilus raphanus Linnaeus, 1758 (unaccepted, foraminifer erroneously described in a mollusc genus)
320. Species Nautilus repandus Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
321. Species Nautilus resupinatus Redterbacher, 1873 † (unaccepted > junior subjective synonym)
322. Species Nautilus rhenanus Holzapfel, 1889 † (unaccepted > superseded combination)
323. Species Nautilus rotundus Crick, 1898 † (unaccepted > superseded combination)
324. Species Nautilus sacheri Barrande, 1865 † (unaccepted > superseded combination)
325. Species Nautilus salinarius Mojsisovics, 1882 † (unaccepted > superseded combination)
326. Species Nautilus sanfilippoi Sorrentino, 1932 † (unaccepted > superseded combination)
327. Species Nautilus sangamonensis F. B. Meek & Worthen, 1861 † (unaccepted > superseded combination)
328. Species Nautilus saxbii J. Morris, 1848 † (unaccepted > superseded combination)
329. Species Nautilus scapha Fichtel & Moll, 1798 (unaccepted > junior homonym, foraminifer erroneously described in a mollusc genus. Primary junior homonym of Nautilus scapha de Wulfen, 1791. Subjective senior synonym Opinion of Rögl and Hansen (1984))
330. Species Nautilus scrobiculatus [Lightfoot], 1786 (unaccepted > superseded combination)
331. Species Nautilus semicostatus Beyrich, 1866 † (unaccepted > superseded combination)
332. Species Nautilus semilituus Linnaeus, 1758 (unaccepted, foraminifer erroneously described in a mollusc genus)
333. Species Nautilus sinuatus Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
334. Species Nautilus spectabilis F. B. Meek & Worthen, 1861 † (unaccepted > superseded combination)
335. Species Nautilus spengleri Gmelin, 1791 (unaccepted, foraminifer erroneously described in a mollusc genus)
336. Species Nautilus sphaericus Forbes, 1846 † (unaccepted > superseded combination)
337. Species Nautilus spinulosus Montagu, 1808 (unaccepted, foraminifer erroneously described in a mollusc genus)
338. Species Nautilus spirula Linnaeus, 1758 (unaccepted, original combination)
339. Species Nautilus splendens Blanford, 1861 † (unaccepted > superseded combination)
340. Species Nautilus springeri C. A. White & St. John, 1868 † (unaccepted > superseded combination)
341. Species Nautilus staadti Cossmann, 1902 † (unaccepted > superseded combination)
342. Species Nautilus sternbergi Barrande, 1865 † (unaccepted > superseded combination)
343. Species Nautilus striatopunctatus Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
344. Species Nautilus striatulus Winchell, 1862 † (unaccepted > junior homonym, invalid: not Schroeder, 1803, no replacement name has been proposed)
345. Species Nautilus strigatus Winchell, 1862 † (unaccepted > superseded combination)
346. Species Nautilus strigilatus Fichtel & Moll, 1798 (unaccepted, originally described in molluscan genus)
347. Species Nautilus subarcuatulus G. Walker & Jacob, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
348. Species Nautilus subarcuatus Montagu, 1803 (unaccepted, foraminifer erroneously described in a mollusc genus)
349. Species Nautilus subbiangulatus A. d'Orbigny, 1850 † (unaccepted > superseded combination)
350. Species Nautilus subfleuriausianus d'Archiac, 1854 † (unaccepted > superseded combination)
351. Species Nautilus sublaevigatus A. d'Orbigny, 1850 † (unaccepted > superseded combination)
352. Species Nautilus subplicatus sensu Steinmann, 1895 † (unaccepted > misapplication)
353. Species Nautilus subquadrangularis Whitfield, 1882 † (unaccepted > superseded combination)
354. Species Nautilus subrotundus Crick, 1898 † (unaccepted > superseded combination)
355. Species Nautilus subtruncatus Morris & Lycett, 1850 † (unaccepted > superseded combination)
356. Species Nautilus superbus Mojsisovics, 1873 † (unaccepted > superseded combination)
357. Species Nautilus teres Eichwald, 1840 † (unaccepted > superseded combination)
358. Species Nautilus textilis Hébert & Eudes-Deslongchamps, 1860 † (unaccepted, uncertain synonym)
359. Species Nautilus transitorius W. Waagen, 1879 † (unaccepted > superseded combination)
360. Species Nautilus tschernyschewi Tzwetaev, 1888 † (unaccepted > superseded combination)
361. Species Nautilus tuberosus Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
362. Species Nautilus tyrannus Barrande, 1865 † (unaccepted > superseded combination)
363. Species Nautilus umbilicaris Deshayes, 1835 † (unaccepted > superseded combination)
364. Species Nautilus umbilicatulus G. Walker & Jacob, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
365. Species Nautilus unguiculatus Gmelin, 1791 (unaccepted, foraminifer erroneously described in a mollusc genus)
366. Species Nautilus valenciennii Hupé, 1854 † (unaccepted > junior subjective synonym)
367. Species Nautilus vastus Kner, 1848 † (unaccepted > superseded combination)
368. Species Nautilus venosus Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
369. Species Nautilus verciacensis Lissajous, 1923 † (unaccepted > superseded combination)
370. Species Nautilus verneuilli Vilanova, 1870 † (unaccepted > junior subjective synonym)
371. Species Nautilus victorianus Teichert, 1943 † (unaccepted, superseded combination)
372. Species Nautilus vortex Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
373. Species Nautilus waageni Gemmelaro, 1886 † (unaccepted > superseded combination)
374. Species Nautilus wandaensis W. Waagen, 1873 † (unaccepted > superseded combination)
375. Species Nautilus wulfeni Mojsisovics, 1873 † (unaccepted > superseded combination)
376. Species Nautilus ziczac J. Sowerby, 1812 † (unaccepted > superseded combination)
377. Species Nautilus zitteli Gemmelaro, 1880 † (unaccepted > superseded combination)

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