Aclis tenuis A. E. Verrill, 1882 (basis of record)
Acteocina bidentata (A. d'Orbigny, 1841) accepted as Cylichnella bidentata (A. d'Orbigny, 1841) (basis of record)
Acteocina oryza (Totten, 1835) accepted as Cylichnella oryza (Totten, 1835) (basis of record)
Acteon melampoides Dall, 1881 (basis of record)
Admete viridula (O. Fabricius, 1780) (additional source)
Alderia modesta (Lovén, 1844) (additional source)
Amauropsis islandica (Gmelin, 1791) (additional source)
Ancula gibbosa (Risso, 1818) (additional source)
Aplysia morio (A. E. Verrill, 1901) (additional source)
Assiminea succinea (L. Pfeiffer, 1840) accepted as Angustassiminea succinea (L. Pfeiffer, 1840) (additional source)
Astyris lunata (Say, 1826) (additional source)
Astyris multilineata (Dall, 1889) (additional source)
Astyris rosacea (A. Gould, 1840) (additional source)
Atlanta peronii Lesueur, 1817 (additional source)
Benthobia tryonii Dall, 1889 (additional source)
Benthonella tenella (Jeffreys, 1869) (additional source)
Bittiolum alternatum (Say, 1822) (additional source)
Bittiolum varium (L. Pfeiffer, 1840) (additional source)
Boreocingula castanea (Møller, 1842) (additional source)
Buccinum ciliatum (O. Fabricius, 1780) (additional source)
Buccinum finmarkianum Verkrüzen, 1875 (additional source)
Buccinum fragile Verkrüzen, 1878 (basis of record)
Buccinum frustulatum A. N. Golikov, 1980 (basis of record)
Buccinum hydrophanum Hancock, 1846 (additional source)
Buccinum kjennerudae Bouchet & Warén, 1985 (additional source)
Buccinum maltzani Pfeffer, 1886 (additional source)
Buccinum micropoma Thorson, 1944 (additional source)
Buccinum scalariforme Møller, 1842 (additional source)
Bulbus fragilis (Leach, 1819) (additional source)
Bulbus smithii T. Brown, 1839 (additional source)
Busycon carica (Gmelin, 1791) (additional source)
Busycon sinistrum Hollister, 1958 accepted as Sinistrofulgur sinistrum (Hollister, 1958) (basis of record)
Cadlina laevis (Linnaeus, 1767) (additional source)
Caecum cooperi S. Smith, 1860 (basis of record)
Caecum johnsoni Winkley, 1908 (additional source)
Calliostoma bairdii A. E. Verrill & S. Smith, 1880 (additional source)
Calliostoma occidentale (Mighels & C. B. Adams, 1842) (additional source)
Calliotropis regalis (A. E. Verrill & S. Smith, 1880) (basis of record)
Cavolinia uncinata (A. d'Orbigny, 1835) (additional source)
Cerithiopsis greenii (C. B. Adams, 1839) (additional source)
Cerithiopsis virginica J. B. Henderson & Bartsch, 1914 (basis of record)
Chrysallida cancellata (A. d'Orbigny, 1841) (basis of record)
Circulus liratus (A. E. Verrill, 1882) (basis of record)
Clio pyramidata Linnaeus, 1767 (additional source)
Colus islandicus (Mohr, 1786) (additional source)
Colus pubescens (A. E. Verrill, 1882) (additional source)
Colus pygmaeus (A. Gould, 1841) (additional source)
Colus sabini (J. E. Gray, 1824) (additional source)
Corambe obscura (A. E. Verrill, 1870) (additional source)
Costoanachis avara (Say, 1822) (additional source)
Couthouyella striatula (Couthouy, 1838) (additional source)
Cratena pilata (A. Gould, 1870) (additional source)
Crepidula convexa Say, 1822 (additional source)
Crepidula plana Say, 1822 (additional source)
Crucibulum striatum (Say, 1826) (additional source)
Cryptonatica affinis (Gmelin, 1791) (additional source)
Curtitoma hebes (A. E. Verrill, 1880) (additional source)
Curtitoma incisula (A. E. Verrill, 1882) (additional source)
Curtitoma ovalis (Friele, 1877) (basis of record)
Curtitoma violacea (Mighels & C. B. Adams, 1842) (additional source)
Cuthona gymnota (Couthouy, 1838) accepted as Catriona gymnota (Couthouy, 1838) (additional source)
Cuthona veronicae (A. E. Verrill, 1880) (basis of record)
Cyclostremiscus pentagonus (Gabb, 1873) (basis of record)
Cylichna alba (T. Brown, 1827) (additional source)
Cylichna eburnea A. E. Verrill, 1885 (additional source)
Cylichna gouldii (Couthouy, 1839) (basis of record)
Cylichna occulta (Mighels & C. B. Adams, 1842) accepted as Cylichnoides occultus (Mighels & C. B. Adams, 1842) (additional source)
Cylichna vortex (Dall, 1881) (basis of record)
Dendronotus elegans A. E. Verrill, 1880 (basis of record)
Dentimargo eburneola (Conrad, 1834) (basis of record)
Dentimargo smithii (A. E. Verrill, 1885) (basis of record)
Dinophysis acuminata Claparède & Lachmann, 1859 (additional source)
Diodora cayenensis (Lamarck, 1822) (basis of record)
Diodora tanneri (A. E. Verrill, 1882) (basis of record)
Doto formosa A. E. Verrill, 1875 (additional source)
Elachisina globuloides (Warén, 1972) (additional source)
Elysia catulus (A. Gould, 1870) (additional source)
Elysia chlorotica A. Gould, 1870 (additional source)
Emarginula nordica Pérez Farfante, 1947 (basis of record)
Epitonium angulatum (Say, 1831) (additional source)
Epitonium celesti (Aradas, 1854) (additional source)
Epitonium championi Clench & R. D. Turner, 1952 (basis of record)
Epitonium humphreysii (Kiener, 1838) (additional source)
Epitonium multistriatum (Say, 1826) (additional source)
Epitonium novangliae (Couthouy, 1838) (basis of record)
Epitonium rupicola (Kurtz, 1860) accepted as Gyroscala rupicola (Kurtz, 1860) (additional source)
Ercolania fuscata (A. Gould, 1870) (additional source)
Erginus rubellus (O. Fabricius, 1780) (additional source)
Eubela limacina (Dall, 1881) (basis of record)
Eudolium bairdii (A. E. Verrill & S. Smith, 1881) (additional source)
Eulimella polita (A. E. Verrill, 1872) (basis of record)
Eulimella smithii (A. E. Verrill, 1880) (basis of record)
Eumetula arctica (Mörch, 1857) (additional source)
Euspira levicula (A. E. Verrill, 1880) (basis of record)
Euspira pallida (Broderip & G. B. Sowerby I, 1829) (additional source)
Euspira triseriata (Say, 1826) (additional source)
Facelina bostoniensis (Couthouy, 1838) (additional source)
Fedikovella beanii (Dall, 1882) (additional source)
Flabellina pellucida (Alder & Hancock, 1843) accepted as Carronella pellucida (Alder & Hancock, 1843) (additional source)
Flabellina verrucosa (M. Sars, 1829) accepted as Coryphella verrucosa (M. Sars, 1829) (additional source)