GASTEROPODA. 127 



Cerithiopsis emersonii Gould, Inv. Mass., 1870, p. 387, fig. 649. 

 Cerithiopsis (Eumetaf) suhulata Dall, Bull. Mus. Comp. ZooL, 

 1889, vol. 18, p. 252, pi. 20, fig. 4. 



Mass. — Vineyard Sound and Buzzards Bay, 2 to 12 fathoms; 

 New Bedford Harbor; Nantucket; Wellfleet. 

 R. I. 



Cerithiopsis costulata (Moller). 



G. O. Sars, Moll. Reg. Arct. Norv., 1878, p. 189, pi. 13, fig. 7. 

 Turritella f costulata Moller, Kr0yer's Naturh. Tidskr., 1842, 

 vol. 4, p. 83. [Greenland.] 



Me.— Off Eastport, Bay of Fundy (VerriU). 



*Seila adamsii (H. C. Lea). 



Dall, Trans. Wagner Free Inst. Sei., 1892, vol. 3, pt. 2, p. 267. 



Cerithium terebrale C. B. Adams, Boston Journ. Nat. Hist., 

 1840, vol. 3, p. 320, pi. 3, fig. 7 (non Lamarck). " New Bedford 

 [, Mass.]." 



Cerithium adamsii H. C. Lea, Trans. Amer. Phil. Soc, 1846, 

 new ser., vol. 9, p. 268. 



Cerithiopsis terebralis Gould, Inv. Mass., 1870, p. 389, fig. 650. 



Mass. — Vineyard Sound and Buzzards Bay, 2 to 12 fathoms. 



R. I. — Narragansett Bay. 



Conn. t 



CERITHIIDAE. 

 *Bittium alternatum (Say). 



Turritella alternata Say, Joum. Acad. Nat. Sci. Phila., 1822, 

 ser. 1, vol. 2, p. 243. " United States." 



Pasithea nigra Totten, Amer. Joum. Sci., 1834, ser. 1, vol. 26, 

 p. 369, pi. 1, figs. 7a, 7b (yoimg). 



Bittium nigrum Gould, Inv. Mass., 1870, p. 321, fig. 590. 



