I20 MOLLUSCA OF THE GXJLF OF MEXICO 90 



55. P- 758. 1903; Vaughan, Publ. No. 133, Cam. Inst., p. 

 171, 1 910. 



Distribution. — Hatteras to Colon. Gulf coast; Cedar Keys 

 and Calhoun Co. , West Fla. ; Point au Fer, Chandeleurs, 

 Cameron, La., Galveston and Corpus Christi, Tex. Pleisto- 

 cene, Grand Chenier, La., New Orleans pumping station 

 No. 7; North Creek, and Labella, West Fla. Pliocene, Ca- 

 loosahatchie River. 



costatus Gmelin, Syst. Nat., p. 3520, 1792; Trj'on, Man., 7, p. 

 108, 1885; Dall, Bull. 37, U. S. N. M.. p. 136, '89; Dall and 

 Simpson, Bull. U. S. Fish Com., i, p. 422, 1901. 



accipitrinus Reeve, Conch. Icon., 6, pi 7, f. 12, 1850; Tryon, 

 Man., 7, pi. I, f. 7, '85. 



Distribution. — St. Augustine, East Fla. to Guadeloupe, W. 

 I. Also West Fla. 



Genus SEGUENZIA Jeffreys 



monocingulata Seguenza, Boll. Comitato Geologico, 7, p. 188, '76; 

 Watson, Chall. Rept. Gastr., p. 105, '86; Dall, Bull. M. C. 

 Z., 18, p. 268, '89; Bull. 37, U. S. N. M., p. 142, pi. 62, f. 

 88, 89, 1889. 



formosa Jeffrey's, Rept. Valorous Cruise, p. 200, 1876; Dall, 

 Bull. M. C. Z., 9, p. 268, '89. 



Distribution. — Western North Atlantic and Bay of Biscay. 

 Gulf of Mexico, West Florida and Texas regions. 100-2033 

 fms. 



trispinosa Watson, Jour. Linn. Soc, 14, p. 591; Chall. Rept. 

 Gastr., 15, pi. 7, f. 4, 1886; Tryon, Man., 9, p. 47, pi. 

 8, f. 79, 80, 1887, Dall, Bull. 37, U. S. N. M., p. 142, 

 1889. 



Distribution. — Hatteras to Pernambuco, Brazil and the Tex 

 region of the Gulf. 294-675 fms. 



