Ampullaria effusa (O. F. Müller, 1774) accepted as Pomacea glauca (Linnaeus, 1758) (basis of record)
Ampullaria effusa var. conica Guppy, 1866 accepted as Pomacea glauca (Linnaeus, 1758) (original description)
Ampullaria effusa var. tristis Guppy, 1866 accepted as Pomacea glauca (Linnaeus, 1758) (original description)
Ampullaria glauca (Linnaeus, 1758) accepted as Pomacea glauca (Linnaeus, 1758) (additional source)
Ampullaria urceus (O. F. Müller, 1774) accepted as Pomacea urceus (O. F. Müller, 1774) (basis of record)
Ampullaria urceus var. purpurascens Guppy, 1864 accepted as Pomacea urceus (O. F. Müller, 1774) (basis of record)
Anodon leotaudi Guppy, 1866 accepted as Anodontites leotaudi (Guppy, 1866) (original description)
Bulimus aureolus Guppy, 1866 accepted as Mesembrinus aureolus (Guppy, 1866) (original description)
Bulimus caracasensis [sic] accepted as Bulimus caraccasensis Reeve, 1849 accepted as Beckianum beckianum (L. Pfeiffer, 1846) (basis of record)
Bulimus fraterculus Potiez & Michaud, 1838 accepted as Bulimulus fraterculus fraterculus (Potiez & Michaud, 1838) (additional source)
Bulimus immaculatus Reeve, 1850 accepted as Antidrymaeus immaculatus (Reeve, 1850) (basis of record)
Bulimus multifasciatus Lamarck, 1822 accepted as Antidrymaeus multifasciatus (Lamarck, 1822) (basis of record)
Bulimus multifasciatus var. imperfectus Guppy, 1866 accepted as Bulimus multifasciatus imperfectus Guppy, 1866 accepted as Mesembrinus imperfectus (Guppy, 1866) (original description)
Bulimus oblongus (O. F. Müller, 1774) accepted as Megalobulimus oblongus (O. F. Müller, 1774) (basis of record)
Bulimus octonoides C. B. Adams, 1845 accepted as Allopeas micra (A. d'Orbigny, 1835) (additional source)
Conulus vacans Guppy, 1866 accepted as Guppya gundlachii gundlachii (L. Pfeiffer, 1840) (original description)
Cyclostoma citrinum G. B. Sowerby I, 1843 accepted as Tropidophora tricarinata var. citrina (G. B. Sowerby I, 1843) accepted as Tropidophora tricarinata (O. F. Müller, 1774) (additional source)
Cyclotus rugatus Guppy, 1864 accepted as Neocyclotus rugatus (Guppy, 1864) (additional source)
Cyclotus translucidus (G. B. Sowerby I, 1843) accepted as Aperostoma translucidum (G. B. Sowerby I, 1843) (basis of record)
Cylindrella trinitaria L. Pfeiffer, 1861 accepted as Brachypodella trinitaria (L. Pfeiffer, 1861) (basis of record)
Ennea bicolor (T. Hutton, 1834) accepted as Gulella bicolor (T. Hutton, 1834) (additional source)
Helicina barbata Guppy, 1864 accepted as Helicina dysoni L. Pfeiffer, 1849 (additional source)
Helicina nemoralis Guppy, 1866 (original description)
Helix discolor A. Férussac, 1821 accepted as Pleurodonte discolor (A. Férussac, 1821) (additional source)
Helix isabella A. Férussac, 1821 (additional source)
Helix perplexa A. Férussac, 1832 accepted as Dentellaria perplexa (A. Férussac, 1832) (additional source)
Marisa cornuarietis (Linnaeus, 1758) (additional source)
Marisa cornuarietis var. swifti Guppy, 1866 accepted as Marisa cornuarietis (Linnaeus, 1758) (original description)
Melampus coffea (Linnaeus, 1758) (additional source)
Neritina meleagris Lamarck, 1822 accepted as Vitta meleagris (Lamarck, 1822) (additional source)
Neritina microstoma A. d'Orbigny, 1842 accepted as Neritina usnea (Röding, 1798) accepted as Vitta usnea (Röding, 1798) (basis of record)
Neritina viridis (Linnaeus, 1758) accepted as Smaragdia viridis (Linnaeus, 1758) (basis of record)
Orthalicus undatus (Bruguière, 1789) (additional source)
Paludestrina spiralis (Guppy, 1864) (basis of record)
Physa rivalis (Maton & Rackett, 1807) accepted as Physella acuta (Draparnaud, 1805) (basis of record)
Planorbis terversanus [sic] accepted as Planorbis terverianus A. d'Orbigny, 1841 accepted as Biomphalaria havanensis (L. Pfeiffer, 1839) (basis of record)
Plekocheilus aurissciuri Guppy, 1866 (original description)
Simpulopsis corrugata Guppy, 1866 (original description)
Stenogyra octona (Bruguière, 1789) accepted as Subulina octona (Bruguière, 1789) (additional source)
Streptaxis deformis A. Férussac, 1821 accepted as Streptartemon deformis (A. Férussac, 1821) (basis of record)
Succinea approximans Shuttleworth, 1854 (additional source)
Tornatellina lamellata (Potiez & Michaud, 1838) accepted as Leptinaria unilamellata (A. d'Orbigny, 1838) (basis of record)
Vaginulus sloanei (Cuvier, 1817) accepted as Veronicella sloanei (Cuvier, 1817) accepted as Veronicella sloanii (Cuvier, 1816) accepted as Leidyula sloanii (Cuvier, 1816) (basis of record)
Valvata agglutinans Guppy, 1864 (additional source)
Vertigo eyriesi Drouët, 1859 accepted as Sterkia eyriesii (Drouët, 1859) accepted as Vertigo eyriesii (Drouët, 1859) (basis of record)

Trinidad-Tobago for Plekocheilus aurissciuri Guppy, 1866