63 Mollusca OF the Gui.f OF Mkxico 31 



americanus Lam., An. s. Vert. 6, p. 188, 1819 ; Reeve, 



Conch. Icon., pi. 4, fig. 17, '56. 

 echinatus Dall, T. W. I., 3, pt. 4, p. 759, '98. 

 Distribution. — Hatteras to Brazil. Pleistocene to Recent. 

 West Florida and Texas, 

 gussoni Costa, Cat. Sist , p. 42, 1829 ; Philippi, Moll. Sicil., 1, p. 

 87, pi. 5, f. 16, 1836 ; Dall, B. M. C. Z., 12, p. 227, '86 ; 

 Bull. 37, U. S. N. M., p. 32, '89. 

 Distribution. — Antilles and Mediterranean. Gulf of Mexico, 

 Yucatan Strait, 640 fms. A small, colorless, deep water 

 species. 



Genus LIMA Bruguiere 

 tenera Sowerby, Thes. Conch., p. 84, No. 2, pi. 21, f. 10, ir, 

 1847 ; Dall, Proc. U. S. Nat. Mus., 6, p. 341, '83 ; Bull. 

 37, U. S. N. M., p. 36, '89; Tr. W. I., 3, pt. 4, p. 768, 

 1898. 



Distribution. — Florida to Barbados. Pliocene to Recent. Gulf 

 coast. — Cedar Keys. Pliocene : Caloosahatchie. 

 inflata Lamarck, An. s. Vert., 6, p. 156 ; Dall, B. M. C. Z., 12, 

 p. 224, '86; Bull. 37, U. S. N. M., p. 36, '89. 

 fasciata Sowerby, Thes. Conch., 1, p. 85, pi. 21, f. 16, 17. 

 Not O street fasciata Linnaeus. 

 Distribution. — Hatteras to Trinidad. Gulf coast. — Cedar 

 Keys, and dredged off west Fla,, 19 fms. 

 8ima Linnaeus, Syst. Nat. ed. X, p. 699, 1758, (as Ostrea); Dall, 

 Tr. W. I., 3, pt. 4, p. 767, '98. 

 radula Chemnitz, Conch. Cat., 6, p. 349, pi. 68, f. 651, 1784. 

 squamosa Lamarck, Syst. An, s. Vert., p. 136, 1801 ; Sower- 

 by, Thes. Conch. 1, p. 84, pi. 21, f. 1, 18 ; Dall, B. M. C. 

 Z., 12, p. 224, '86 ; Bull. 37, U. S. N. M., p. 36, '89. 

 Distribution. — Florida to Brazil and almost world wide. Gulf 

 coast. — West Florida, shallow ; Yucatan Strait, 640 fms. 

 (LsmatuSa) confusa E. A. Smith, Chall. Rept. Lam., 1886; Dall, 

 B. M. C. Z., 12, p. 226, '86 ; Bull. 37, U. S. N. M. , p. 36, 

 1889. 



