Aeolis pilata A. Gould, 1870 accepted as Cratena pilata (A. Gould, 1870) (original description)
Alderia harvardiensis A. Gould, 1870 (original description)
Astarte crebricostata McAndrew & Forbes, 1847 sensu A. Gould, 1870 accepted as Astarte subaequilatera G. B. Sowerby II, 1854 (basis of record)
Boltenia burkhardti Binney, 1870 accepted as Boltenia ovifera (Linnaeus, 1767) (original description)
Calliopaea fuscata A. Gould, 1870 accepted as Ercolania fuscata (A. Gould, 1870) (original description)
Columbella rosacea (A. Gould, 1840) accepted as Astyris rosacea (A. Gould, 1840) (basis of record)
Cyprina vulgaris G. B. Sowerby I, 1831 accepted as Arctica islandica (Linnaeus, 1767) (source of synonymy)
Doris diademata A. Gould, 1870 accepted as Onchidoris diademata (A. Gould, 1870) (original description)
Doris grisea A. Gould, 1870 accepted as Onchidoris grisea (A. Gould, 1870) (original description)
Doris illuminata A. Gould, 1841 accepted as Polycera lessonii A. d'Orbigny, 1837 accepted as Palio dubia (M. Sars, 1829) (source of synonymy)
Doris pallida A. Gould, 1870 (original description)
Doris tenella A. Gould, 1870 accepted as Onchidoris tenella (A. Gould, 1870) (original description)
Elysia chlorotica A. Gould, 1870 (original description)
Embletonia fuscata A. Gould, 1870 accepted as Tenellia fuscata (A. Gould, 1870) (original description)
Embletonia remigata A. Gould, 1870 (original description)
Hermaea cruciata A. Gould, 1870 (original description)
Heterofusus J. Fleming, 1823 accepted as Limacina Bosc, 1817 (status source)
Heterofusus retroversus (J. Fleming, 1823) accepted as Limacina retroversa (J. Fleming, 1823) (basis of record)
Lyrodus A. Gould, 1870 (original description)
Mactra solidissima curta A. Gould, 1871 accepted as Spisula solidissima (Dillwyn, 1817) (original description)
Placobranchus catulus Gould, 1870 accepted as Elysia catulus (A. Gould, 1870) (original description)
Solecurtus nitidus Gould, 1840 accepted as Siliqua squama (Blainville, 1827) (source of synonymy)
Solen ensis var. americanus A. Gould, 1870 accepted as Ensis leei M. Huber, 2015 (original description)
Tectura alveus (Conrad, 1831) accepted as Lottia alveus (Conrad, 1831) (basis of record)
Teredo chlorotica Gould, 1870 accepted as Lyrodus pedicellatus (Quatrefages, 1849) (original description)
Turritella acicula W. Stimpson, 1851 accepted as Turritellopsis stimpsoni Dall, 1919 (additional source)
Yoldia siliqua (Reeve, 1855) accepted as Portlandia arctica (J. E. Gray, 1824) (basis of record)

Boston Harbor for Aeolis pilata A. Gould, 1870 
Boston Harbor for Alderia harvardiensis A. Gould, 1870 
Boston Harbor for Calliopaea fuscata A. Gould, 1870 
Boston Harbor for Doris grisea A. Gould, 1870 
Boston Harbor for Embletonia remigata A. Gould, 1870 
Boston Harbor for Placobranchus catulus Gould, 1870 
Grand Manan Island for Mactra solidissima curta A. Gould, 1871 
Massachusetts for Doris pallida A. Gould, 1870 
Massachusetts for Doris tenella A. Gould, 1870 
Massachusetts for Elysia chlorotica A. Gould, 1870 
Massachusetts for Embletonia fuscata A. Gould, 1870 
Massachusetts for Hermaea cruciata A. Gould, 1870 
Massachusetts Bay for Doris diademata A. Gould, 1870 

 Nomenclature

 for Canthopsis Agassiz, 1850

Canthopsis harvardiensis was a nomen nudum when first introduced by Agassiz (1851); it was described in 1870 by ... [details]