74 MOLI.USCA OF THE GULF OF MEXICO 44 



Distribution. — Massachussetts to Pernambuco. Gulf of 

 Mexico, Yucatan Strait, 640 fms. and Blake Station 2, west 

 of Florida, at 895 fms. 



Genus CA?^CELLARiA I^amarck 



reticuSata Linnseus, Syst. Nat., ed. XII, p. 1190, 1767, (as 

 Valuta); Sowerby, Thesaurus, 2, p. 442, pi. 92, f. 17, 1848; 

 Tryon, Man., 7, p. 69, pi. 2, f. 25, 26, '85; Dall, Bull. M. 

 C. Z., 18, p. 129, '89; Vanatta, Pr. A. N. S., Phila., 55, p. 

 757, 1903. 



Distribution. — Hatteras to Guadeloupe, 5-30 fms. Gulf 

 coast: Crooked Isl., Charlotte Harboi and Sarasota Bay, 

 West Fla.; Chandeleurs, La.; Galveston, Tex. Pleistocene, 

 New Orleans Pnmping Station No, 7. 



Note. — The fossil species, C. conradiana Dall, (Tr. Wagner 

 Inst., 3, p. 42, 1890), is closely allied to C. letiadata. 



gaivestonensis Harris, Bull. Am. Pal., vol. i, p. loo, pi. 3, f. 11, 

 1895. 



Distribution. — Upper Miocene, Galveston well at 2552-2600 

 feet. 



(Morona) cSavatuIa Sowerby, Pr. Zool. Soc,, p. 52, 1832; Conch. 

 111., f. 12, '32; Tryon, Man., 7, p. 75. pi. 4, f. 61, '85; 

 Harris, Bull. Am. Pal., vol. i, p. 99, '95; Dall. Pr. U. S. 

 N, M., 37, p. 209, 1910. 



Distribution. — Recent, Panama to Paita, Peru. Upper Mio- 

 cene, Galveston well at 2552-2600 feet, (Harris). Not in 

 the recent Atlantic fauna. 



(Trigonostoma) agassizi Dall, Bull. M. C Z., 18, p. 130, pi. 35, 

 f. 4, 1S89; Bull. 37, U. S. N. M., p. 104, pi. 35, f. 4, '89. 



Distribution. — Cape Lookout, N. C, 18 fms. Gulf of Mex- 

 ico between Mississippi delta and Cedar Ke3-s, 25 fms. 



(Trjgonostoma) tenera Philippi, Zeitsch. fur. Mai., 5. p. 24, '48; 



