123 Bulletin 38 • 153 



crenulatus Gmelin, Syst. Nat., p. 3575, 1788; Pilsbry, Man., 10, 

 p. 203, pi. 45, f. 90, '88: Ball, Bull. 37, U. S N. M., p. 158, 

 '89; Tr. W.I. S., 3. p. 382, '92. 



Distribution, — Hatteras to Barbados. 2-30 fms. Also West 

 Florida at Crooked Island and St. Andrew's Bay. Pliocene, 

 of the Caloosahatehie, probably a varietj^ cf crenulatus. 



Genus LEPTOTHYRA (Carpenter) Pease 



snduta Watson, Jour. Linn. Soc, 14, p. 715, 1879 (as Turbo); 

 Chall. Gastr. p. 128, pi. 6, f. i, 1885. 



albida Ball, Bull. M. C. Z., iS, p. 352, pi. 38, f. 6, '89. 



Distribution. — Hatteras to Martinique, 15-2805 fms. Yuca- 

 tan Strait, 640 fms. 



Genus LJVONA Gray 



pica Linnaeus, Syst. Nat., 10, p. 763, 1758, (as Turbo'); Pilsbry, 

 Man., II, p. 277, pi. 41, f. 24, '89; Dall, Bull. 37, U. S. N. 

 M., p. 160, '89; Dall and Simpson, Bull. U. S. Fish Com., 

 I, p. 443, 1901. 



Distribution. — Charlotte Harbor, Vv^est Florida, to Colon. 

 37-160 fms. 



Genus GAZA Watson 



syperha Dall, Bull. M. C. Z., 9, p. 49, '81; 18, p. 354, pi. 22, f. 

 4, 4a, '89; Bull. 37, U. S. N. M., p. 160, pi. 22, f. 4, 4a, 

 1889. 



Distribution, — Gulf of Mexico between Mississippi delta and 

 Cedar Keys, 324 fms. Also Barbados. 



fischeri Dall, Bull. Mus. Comp. Zool., Harv. Coll., 18, p. 355, 

 pi. 37, f. 6, '89; Bull. 37, U. S. N. M., p. 160, pi. 37, f. 6, 



Distribution. — Gulf of Mexico, west of Florida and St. 

 lyucia, W. I., 423-426 fm.s. 



