PELECYPODA. 77 



*Mulinia lateralis (Say). 



Verrill, Rept. Inv. Vineyard Sound, 1873, p. 680, pi. 26, fig. 184, B 

 (not fig. 185, B). 



Mactra lateralis Say, Journ. Acad. Nat. Sci. Phila., 1822, ser. 1, 



vol. 2, p. 309. " COAST OF THE UNITED STATES." Gould, Inv. 



Mass., 1870, p. 77, fig. 389. 



Me. — Casco Bay. 



Mass. — Lynn; Boston; Vineyard Sound and Buzzards Bay, 

 1 to 15 fathoms. 

 R. I.— Field's Point; Bristol. 

 Conn. — New Haven; Branford. 



MESODESMATIDAE. 

 *Meso(lesina arctatum (Conrad). 



Mactra arctata Conrad, Journ. Acad. Nat. Sci. Phila., 1831, ser. 1, 

 vol. 6, p. 257, pi. 11, fig. 1. " Massachusetts." 



Ceronia arctata Gould, Inv. Mass., 1870, p. 80, fig. 391. 



Me. 



Mass. — Plum Island; Nahant; Truro; Chatham; Nantucket. 



Conn. — Stonington. 



Mesodesma deauratum (Turton). 



Mactra deaurata^\ixton, Conch. Insul. Brit. Dithyra, 1830, p. 71, 

 pi. 5, fig. 5. " ExMOUTH [England]." 



Ceronia deaurata Gould, Inv. Mass., 1870, p. 81, fig. 392. 



Georges Bank (Gould). 



MYACID.\E. 

 *Mya arenaria Linne. 



Linne, Syst. Nat., ed. 10, 1758, vol. 1, p. 670. "O. Europae 

 septentrionalis." Gould, Inv. Mass., 1870, p. 55, fig. 375. 



Me. to Conn.— The Common Clam of the New England coast. 



