Amnicola Gould & Haldeman, 1840 (additional source)
Argulus alosae Gould, 1841 (original description)
Astarte castanea picea Gould, 1841 accepted as Astarte castanea (Say, 1822) (original description)
Astarte quadrans Gould, 1841 (original description)
Astarte undata Gould, 1841 (original description)
Cancer Sayi Gould, 1841 accepted as Cancer irroratus Say, 1817 [in Say, 1817-1818] (original description)
Chirodota arenata Gould, 1841 accepted as Caudina arenata (Gould, 1841) (original description)
Cingula aculeus Gould, 1841 accepted as Onoba aculeus (Gould, 1841) (original description)
Cingula minuta (Totten, 1834) accepted as Ecrobia truncata (Vanatta, 1924) (new combination reference)
Doris illuminata Gould, 1841 accepted as Polycera lessonii 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 Gould, 1841 accepted as Colus pygmaeus (Gould, 1841) (original description)
Helix electrina Gould, 1841 accepted as Perpolita electrina (Gould, 1841) (original description)
Limax togata Gould, 1841 accepted as Philomycus togatus (Gould, 1841) (original description)
Limax tunicata Gould, 1841 accepted as Deroceras reticulatum (O. F. Müller, 1774) (original description)
Lymnea chalybea Gould, 1840 accepted as Pseudosuccinea columella (Say, 1817) (source of synonymy)
Machaera Gould, 1841 accepted as Siliqua Megerle von Mühlfeld, 1811 (original description)
Margarita argentata Gould, 1841 accepted as Margarites argentatus (Gould, 1841) (original description)
Modiola nexa Gould, 1841 accepted as Musculus niger (J.E. Gray, 1824) (original description)
Modiola pectinula Gould, 1841 accepted as Arvella pectinula (Gould, 1841) (original description)
Nucula hyperborea Gould, 1841 accepted as Yoldia hyperborea (Gould, 1841) (original description)
Nucula jacksonii Gould, 1841 accepted as Nuculana pernula (O. F. Müller, 1779) (original description)
Nucula sapotilla Gould, 1841 accepted as Yoldia sapotilla (Gould, 1841) (original description)
Pilumnus Harrisii Gould, 1841 accepted as Rhithropanopeus harrisii (Gould, 1841) (original description)
Planorbis dilatatus Gould, 1841 accepted as Dilatata dilatata (Gould, 1841) (original description)
Pupa curvidens Gould, 1841 accepted as Gastrocopta pentodon (Say, 1822) (original description)
Pupa fallax sensu Gould, 1841 accepted as Pupoides albilabris (C. B. Adams, 1841) (basis of record)
Trochus costalis Gould, 1841 accepted as Margarites costalis (Gould, 1841) (original description)
Valvata tricarinata var. simplex Gould, 1841 accepted as Valvata tricarinata (Say, 1817) (original description)
Velutina zonata Gould, 1841 accepted as Limneria undata (T. Brown, 1839) (original description)
Venus fluctuosa Gould, 1841 accepted as Liocyma fluctuosa (Gould, 1841) (original description)

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