Acanthina lugubris (G. B. Sowerby I, 1822) accepted as Mexacanthina lugubris (G. B. Sowerby I, 1822) (basis of record)
Acanthina paucilirata (Stearns, 1871) accepted as Acanthinucella paucilirata (Stearns, 1871) (basis of record)
Acanthina punctulata (J. E. Gray, 1835) accepted as Acanthinucella punctulata (J. E. Gray, 1835) (basis of record)
Acanthina spirata (Blainville, 1832) accepted as Acanthinucella spirata (Blainville, 1832) (basis of record)
Acanthodoris armata O'Donoghue, 1927 (additional source)
Acanthodoris atrogriseata O'Donoghue, 1927 (additional source)
Acanthodoris brunnea MacFarland, 1905 (additional source)
Acanthodoris caerulescens Bergh, 1880 (additional source)
Acanthodoris hudsoni MacFarland, 1905 (additional source)
Acanthodoris lutea MacFarland, 1925 (additional source)
Acanthodoris nanaimoensis O'Donoghue, 1921 (additional source)
Acanthodoris pilosa (Abildgaard, 1789) (additional source)
Aclis occidentalis (Hemphill, 1894) accepted as Murchisonella occidentalis (Hemphill, 1894) (basis of record)
Aclis shepardiana (Dall, 1919) (basis of record)
Aclis turrita (P. P. Carpenter, 1864) accepted as Alabina turrita (P. P. Carpenter, 1866) (basis of record)
Acteocina bidentata (A. d'Orbigny, 1841) accepted as Cylichnella bidentata (A. d'Orbigny, 1841) (additional source)
Acteocina carinata (P. P. Carpenter, 1857) accepted as Acteocina inculta (A. Gould, 1855) (additional source)
Acteocina cerealis (A. Gould, 1853) (additional source)
Acteocina culcitella (A. Gould, 1853) (additional source)
Acteocina eximia (Baird, 1863) accepted as Acteocina cerealis (A. Gould, 1853) (basis of record)
Acteocina harpa (Dall, 1871) (additional source)
Acteocina magdalenensis Dall, 1919 accepted as Acteocina infrequens (C. B. Adams, 1852) (basis of record)
Acteocina oldroydi Dall, 1925 (basis of record)
Acteocina oryza (Totten, 1835) accepted as Cylichnella oryza (Totten, 1835) (additional source)
Acteocina smirna Dall, 1919 accepted as Acteocina inculta (A. Gould, 1855) (additional source)
Acteon traskii Stearns, 1897 (additional source)
Adalaria jannae Millen, 1987 accepted as Atalodoris jannae (Millen, 1987) (additional source)
Adalaria proxima (Alder & Hancock, 1854) (additional source)
Adalaria tschuktschica A. Krause, 1885 (additional source)
Addisonia brophyi J. H. McLean, 1985 (additional source)
Admete californica (Dall, 1908) (additional source)
Admete regina Dall, 1911 accepted as Admete solida (Aurivillius, 1885) (additional source)
Adontorhina sphaericosa Valentich-Scott, 1986 (basis of record)
Aegires albopunctatus MacFarland, 1905 (additional source)
Aeolidiella chromosoma (T. D. A. Cockerell & Eliot, 1905) accepted as Anteaeolidiella chromosoma (T. D. A. Cockerell & Eliot, 1905) (additional source)
Aeolidiella oliviae MacFarland, 1966 accepted as Anteaeolidiella oliviae (MacFarland, 1966) (basis of record)
Aesopus eurytoideus [sic] accepted as Aesopus eurytoides (P. P. Carpenter, 1864) (basis of record)
Aesopus myrmecoon Dall, 1916 (additional source)
Aglaja ocelligera (Bergh, 1894) (additional source)
Akera thompsoni Olsson & T. L. McGinty, 1951 accepted as Akera bayeri Ev. Marcus & Er. Marcus, 1967 (basis of record)
Aldisa albomarginata Millen, 1985 (basis of record)
Aldisa cooperi Robilliard & Baba, 1972 (basis of record)
Aldisa sanguinea (J. G. Cooper, 1863) (additional source)
Aldisa tara Millen, 1985 (basis of record)
Aldisa zetlandica (Alder & Hancock, 1854) (additional source)
Alvania areolata (W. Stimpson, 1851) accepted as Tachyrhynchus reticulatus (Mighels & C. B. Adams, 1842) (additional source)
Alvania compacta (P. P. Carpenter, 1864) (basis of record)
Alvania microglypta F. Haas, 1943 (basis of record)
Alvania oldroydae Bartsch, 1911 (basis of record)
Alvania rosana Bartsch, 1911 (basis of record)
Alvania trachisma Bartsch, 1911 (basis of record)
Alvania tumida P. P. Carpenter, 1857 (basis of record)
Americardia biangulata (Broderip & G. B. Sowerby I, 1829) (additional source)
Americardia guppyi (Thiele, 1910) (additional source)
Americardia media (Linnaeus, 1758) (additional source)
Amphissa cymata Dall, 1916 accepted as Amphissa versicolor Dall, 1871 (basis of record)
Anadara multicostata (G. B. Sowerby I, 1833) accepted as Larkinia multicostata (G. B. Sowerby I, 1833) (basis of record)
Anatoma baxteri J. H. McLean, 1984 accepted as Anatoma lyra (S. S. Berry, 1947) (basis of record)
Anatoma lyra (S. S. Berry, 1947) (basis of record)
Ancistrolepis beringianus Dall, 1919 accepted as Ancistrolepis beringiana Dall, 1919 accepted as Neancistrolepis beringiana (Dall, 1919) (basis of record)
Ancistrolepis eucosmius (Dall, 1891) (additional source)
Ancula evelinae Er. Marcus, 1961 (basis of record)
Ancula pacifica MacFarland, 1905 (basis of record)
Anidolyta spongotheras (Bertsch, 1980) accepted as Tylodina spongotheras (Bertsch, 1980) (additional source)
Anisodonta carolina Dall, 1900 (basis of record)
Anisodoris lentiginosa Millen, 1982 accepted as Diaulula lentiginosa (Millen, 1982) accepted as Peltodoris lentiginosa (Millen, 1982) (basis of record)
Anisodoris nobilis (MacFarland, 1905) accepted as Montereina nobilis MacFarland, 1905 accepted as Peltodoris nobilis (MacFarland, 1905) (basis of record)
Anisodoris worki Ev. Marcus & Er. Marcus, 1967 accepted as Sclerodoris worki (Ev. Marcus & Er. Marcus, 1967) (basis of record)
Anodontia alba Link, 1807 (additional source)
Anodontia philippiana (Reeve, 1850) accepted as Pegophysema philippiana (Reeve, 1850) (basis of record)
Anomia simplex A. d'Orbigny, 1853 (additional source)
Anomia squamula Linnaeus, 1758 accepted as Heteranomia squamula (Linnaeus, 1758) (additional source)
Antiplanes briseis Dall, 1919 (additional source)
Aplysia brasiliana Rang, 1828 (additional source)
Aplysia californica J. G. Cooper, 1863 (additional source)
Aplysia donca Ev. Marcus & Er. Marcus, 1960 accepted as Aplysia morio (A. E. Verrill, 1901) (basis of record)
Aplysia geographica (A. Adams & Reeve, 1850) accepted as Syphonota geographica (A. Adams & Reeve, 1850) (basis of record)
Aplysia reticulopoda Beeman, 1960 (additional source)
Aplysia vaccaria Winkler, 1955 (additional source)
Aplysiopsis enteromorphae (Eliot, 1905) (additional source)
Aplysiopsis olivae [sic] accepted as Hermaea oliviae (MacFarland, 1966) (basis of record)
Aplysiopsis zebra K. B. Clark, 1982 accepted as Aplysiopsis formosa Pruvot-Fol, 1953 (basis of record)
Aporrhais occidentalis (H. Beck, 1836) accepted as Arrhoges occidentalis (H. Beck, 1836) (additional source)
Archidoris montereyensis (J. G. Cooper, 1863) accepted as Doris montereyensis J. G. Cooper, 1863 (basis of record)
Archidoris odhneri (MacFarland, 1966) accepted as Doris odhneri (MacFarland, 1966) (basis of record)
Arctomelon stearnsii (Dall, 1872) (additional source)
Arene bairdii (Dall, 1889) (additional source)
Arene briarea (Dall, 1881) (additional source)
Arene cruentata (Megerle von Mühlfeld, 1824) (additional source)
Arene tricarinata (Stearns, 1872) (additional source)
Arene variabilis (Dall, 1889) (additional source)
Arene venustula Aguayo & Rehder, 1936 (additional source)
Armina cordellensis Gosliner & Behrens, 1996 (additional source)
Armina mulleri (Ihering, 1886) accepted as Armina muelleri (Ihering, 1886) (basis of record)
Asperiscala bellastriata (P. P. Carpenter, 1864) accepted as Epitonium bellastriatum (P. P. Carpenter, 1864) (basis of record)
Asperiscala cookeana (Dall, 1917) accepted as Epitonium cookeanum Dall, 1917 (basis of record)
Asperiscala lowei (Dall, 1906) accepted as Epitonium lowei (Dall, 1906) (basis of record)
Assiminea translucens (P. P. Carpenter, 1864) (basis of record)
Astarte borealis (Schumacher, 1817) accepted as Tridonta borealis Schumacher, 1817 (additional source)
Astarte castanea (Say, 1822) accepted as Isocrassina castanea (Say, 1822) (additional source)

English West Indian green chiton for Chiton tuberculatus Linnaeus, 1758

 Status

 for Succinea avara Say, 1824

Based on a juvenile shell with a generalized type locality in an area having several species of Succineidae. ... [details]

 Synonymy

 for Alvania compacta (P. P. Carpenter, 1864)

Has priority over A. acutelirata (Carpenter, 1864) by first reviser's choice of McLean, 1969. [details]