I02 MOLLUSCA OF THE GULF OF MEXICO 72 



Distribution. — Connecticut to West Fla., Point au Fer., La., 

 and Galveston, Tex. Pleistocene, Lake Borgne, La., bor- 

 ings. 



sayanum Dall, Bull. M. C. Z., i8, p. 313, 1889, (as Scala); Bull. 

 37, U. S. N. M., p. 122, pi. 50, f. 10, '89; Tr. W. I. S., 3, 

 p. 158, '90; Singley, 4th Ann. Rept. Tex. G. S., p. 336, 

 1892. 



dathrum Say (in part). 



Distribution. — Virginia to Florida Keys, West Florida, Cam- 

 eron, La., Corpus Christi and Galveston, Texas. Pleisto- 

 cene, Grand Chenier, La. Pliocene, Caloosahatchie River, 

 Florida. 



tenue Sowerby, Pr. Zool. Soc, p. no, 1844, {•as Scala); Dall, 

 Bull. 37, U. S. N. M., p. 122; 1889. 



Distribution. — Gulf of Mexico, Texas and Cameron (?) La., 

 to St. Thomas, W. I. 



nitidellum Dall, Bull. M. C. Z., 18, p. 314, 1889, {2.S Scala); Bull. 

 37, U. S. N. M., p. 124, '89; Pr. U. S. N. M., 24, p. 505, 

 pi. 30, f. 8, 1902. 



Distribution. — Hatteras to Cedar Kej^s, Fla. 32-63 fms. 



scipio Dall, Bull, M. C. Z., 18, p. 310, 1889; Bull. 37, U. S. N, 

 M., p. 124, '89, (as Scala); Pr. U. S. N. M., 24, p. 506, 

 pi. 29, f. 10, 1902. 



Distribution. — Hatteras, N. C, to Texas and Vera Cruz, 

 Mexico. 10-16 fms. Pink with white varices. 



denticulatum Sowerby, Thes. Conch., p. 87, pi. 32, f. 25, 26, '47; 

 Tryon, Man., 9, pi. 13, f. 100, 1887; Dall, Bull. 37, U. S. 

 N. M., p, 124, '89. 



Distribution. — Hatteras to West Florida and the Bahamas. 



Sineatum Say, Jour. A. N. S, Phila., 2, p. 242, 1822, (as Sca- 

 laria); Hilgard, House of Rep. Kx. Doc. i, pt. 2, p. 887, '78; 

 Tryon, Man., 9, p. 79, pi. 16, f. 14, 87; Dall, Tr. W. I. S., 



