loi Bulletin 38 131 



Distribution. — Hatteras to Tortugas and to Egmont Key, 

 West Fla. 2-63 fms. Pliocene, Caloosahatchie River, 

 Florida, 



giabrum Montagu, Test. Brit., 2, p. 497,1803, Dentaliu7n); 

 Tryon, Man., 8, p. 215, pi. 66, f. 57, 1886; Dall, Bull. 37, 

 U. S. N. M., p. 142, '89. 



Distribution. — North Carolina to Tampa, West Fla. Also 

 European. Pliocene of the Caloosahatchie and of England. 

 Miocene of York town, Va. 



cooper! Sanderson Smith, Ann. & Lye N. Hist. N. Y., 7, pp. 

 154, 168, 1862; 9, p. 393, f. 3, 1870; Tryon, Man., 8, p. 

 221, pi. 67, f. 84, '85; Dall, Tr. W. I. S., 3, p. 299, 1892; 

 Vanatta, Pr. A. N. S. Phila., 55, p. 758, 1903; Johnson, 

 Occ. Pa. Bost. Soc. N. H., 7, p. 124, 1915. 



costatiim Verrill, Am, Jour. Sci., (3) 3, p. 283, pi. 6, f. 6, 

 1872. 



Distribution. — Massachussetts to the Antilles. Gulf coast: 

 Crooked Island, Calhoun Co. , West Fla. Pliocene of the 

 Caloosahatchie and Shell Creek, West Fla. 



puIchellumStimpson, Pr. Bost. Soc. N. H., 4, p. 112, 1851; Shells 

 of New England, p. 36, pi. 2, f. 3; Hilgard, House of Rep. 

 Ex. Doc, I, pt. 2, p. 886, 1878. Tryon, Man., 8, p. 217, 

 pi. 66, f. 63, '86; Dall, Bull. 37, U. S. N. M., p. 142, pi. 

 50, f. 22, '89; Vanatta, Pr. A. N. S. Phila., 55, p. 758, 

 1903; Johnson, Occ. Pa. Bost. Soc. N. H., 7, p. 123, 1915. 



Distribution.^ — Cape Cod, Mass., to the Tortugas. Gulf 

 coast: Crooked Island, Calhoun Co. , Fla. Pleistocene, Take 

 Borgne, La., borings. 



Genus I^EIOCERAS Carpenter 



deshayesi de Folin, Annales Soc. Linn. Maine et Loire, 11, '69, 

 Dall, Bull. 37, U. S. N. M., p. 142, '89. 



Distribution. — Tampa, West Fla., to Jamaica, W. I. 



