Amnicola A. Gould & Haldeman, 1840 (additional source)
Argulus alosae Gould, 1841 (original description)
Astarte castanea picea A. Gould, 1841 accepted as Isocrassina castanea (Say, 1822) (original description)
Astarte quadrans A. Gould, 1841 (original description)
Astarte undata A. Gould, 1841 (original description)
Caligus cristatus Gould, 1841 (original description)
Cancer Sayi Gould, 1841 accepted as Cancer irroratus Say, 1817 (original description)
Caprella sanguinea Gould, 1841 (original description)
Cerithium sayi A. Gould, 1841 accepted as Bittiolum alternatum (Say, 1822) (original description)
Chiridota arenata Gould, 1841 accepted as Caudina arenata (Gould, 1841) (original description)
Chirodota arenata Gould, 1841 accepted as Caudina arenata (Gould, 1841) (original description)
Chiton emersonianus A. Gould, 1841 accepted as Amicula vestita (Broderip & G. B. Sowerby I, 1829) accepted as Amicula amiculata (Pallas, 1788) (original description)
Cingula aculeus A. Gould, 1841 accepted as Onoba aculeus (A. Gould, 1841) (original description)
Cingula minuta (Totten, 1834) accepted as Ecrobia truncata (Vanatta, 1924) (new combination reference)
Doris illuminata A. Gould, 1841 accepted as Polycera lessonii A. d'Orbigny, 1837 accepted as Palio dubia (M. Sars, 1829) (original description)
Echinus granulatus Gould, 1841 accepted as Strongylocentrotus pallidus (Sars G.O., 1872) (original description)
Fusus islandicus var. pygmaeus A. Gould, 1841 accepted as Colus pygmaeus (A. Gould, 1841) (original description)
Helix electrina A. Gould, 1841 accepted as Perpolita electrina (Gould, 1841) (original description)
Limax togata A. Gould, 1841 accepted as Philomycus togatus (A. Gould, 1841) (original description)
Limax tunicata A. Gould, 1841 accepted as Deroceras reticulatum (O. F. Müller, 1774) (original description)
Littorina rudis (Maton, 1797) accepted as Littorina saxatilis (Olivi, 1792) (basis of record)
Lucina radula (Montagu, 1803) accepted as Lucinoma borealis (Linnaeus, 1767) (additional source)
Lymnea chalybea A. Gould, 1840 accepted as Pseudosuccinea columella (Say, 1817) (source of synonymy)
Machaera A. Gould, 1841 accepted as Siliqua (Neomachaera) M. Huber, 2010 represented as Siliqua Megerle von Mühlfeld, 1811 (original description)
Machaera nitida A. Gould, 1841 (original description)
Margarita argentata A. Gould, 1841 accepted as Margarites olivaceus (T. Brown, 1827) (original description)
Modiola nexa A. Gould, 1841 accepted as Musculus niger (J. E. Gray, 1824) (original description)
Modiola pectinula A. Gould, 1841 accepted as Arvella pectinula (A. Gould, 1841) (original description)
Natica exulans A. Gould, 1841 accepted as Amauropsis islandica (Gmelin, 1791) (original description)
Natica pusilla J. C. Jay, 1822 sensu A. Gould, 1841 accepted as Euspira pallida (Broderip & G. B. Sowerby I, 1829) (original description)
Nucula hyperborea A. Gould, 1841 accepted as Yoldia hyperborea (A. Gould, 1841) (original description)
Nucula jacksonii A. Gould, 1841 accepted as Nuculana pernula (O. F. Müller, 1779) (original description)
Nucula sapotilla A. Gould, 1841 accepted as Yoldia sapotilla (A. Gould, 1841) (original description)
Pilumnus Harrisii Gould, 1841 accepted as Rhithropanopeus harrisii (Gould, 1841) (original description)
Planorbis dilatatus A. Gould, 1841 accepted as Dilatata dilatata (A. Gould, 1841) accepted as Menetus dilatatus (A. Gould, 1841) (original description)
Planorbis exacutus A. Gould, 1841 accepted as Promenetus exacuous (Say, 1821) (original description)
Pupa curvidens A. Gould, 1841 accepted as Gastrocopta pentodon (Say, 1822) (original description)
Pupa fallax sensu A. Gould, 1841 accepted as Pupoides albilabris (C. B. Adams, 1841) accepted as Pupoides nitidulus (L. Pfeiffer, 1839) (basis of record)
Serripes A. Gould, 1841 (original description)
Succinea ovalis A. Gould, 1841 accepted as Oxyloma decampii gouldi Pilsbry, 1948 accepted as Oxyloma decampii (Tryon, 1866) (original description)
Tellina radula Montagu, 1803 accepted as Lucinoma borealis (Linnaeus, 1767) (additional source)
Trochus costalis A. Gould, 1841 accepted as Margarites costalis (A. Gould, 1841) (original description)
Valvata tricarinata var. simplex A. Gould, 1841 accepted as Valvata tricarinata (Say, 1817) (original description)
Velutina zonata A. Gould, 1841 accepted as Limneria undata (T. Brown, 1839) (original description)
Venus fluctuosa A. Gould, 1841 accepted as Liocyma fluctuosa (A. Gould, 1841) (original description)

Boston Harbor for Doris illuminata A. Gould, 1841 
Cape Cod for Nucula sapotilla A. Gould, 1841 
Grand Banks for Venus fluctuosa A. Gould, 1841 
Gulf of Maine/Bay of Fundy for Nucula jacksonii A. Gould, 1841 
Massachusetts for Astarte castanea picea A. Gould, 1841 
Massachusetts for Cingula aculeus A. Gould, 1841 
Massachusetts for Helix electrina A. Gould, 1841 
Massachusetts for Lymnea chalybea A. Gould, 1840 
Massachusetts for Margarita argentata A. Gould, 1841 
Massachusetts for Modiola nexa A. Gould, 1841 
Massachusetts for Modiola pectinula A. Gould, 1841 
Massachusetts for Planorbis dilatatus A. Gould, 1841 
Massachusetts for Pupa curvidens A. Gould, 1841 
Massachusetts for Velutina zonata A. Gould, 1841 
Massachusetts Bay for Astarte quadrans A. Gould, 1841 
United States part of the North Atlantic Ocean for Carcinus maenas (Linnaeus, 1758)  (origin: alien)
Vermont for Valvata tricarinata var. simplex A. Gould, 1841