I03 BlTLLBTlN 38 133 



Tryon's Manuel, 8, p. 187, 1886). Shells from the Gulf, 

 Blake station 36, at 24 fms., have been referred by Dall to 

 V. btmbricalis Linn. (See Bull. M. C. Z., 18, p. 261, '89) 

 but the true Linnsean lufiibricalis is Oriental. 



nigricans Dall, Pr. U. S. N. M., 6, p. 334, 1883, {a.s lumh'-icalis 

 van); Bull. 37, U, S. N. M., p. 144, '89. 



Distribution. — West Florida and Texas. 2-14 fms. 

 Genus PETALOCOP^CHUS Lea 



irregularis d'Orbigny, Moll, Cuba, i, p. 235, pi. 17, f. 16, iS,'42, 

 (as Vermeius); Dall, Bull. 37, U. S. N. M., p. 144, 1889; 

 Tr. W. I. S., 3. p. 304, '92. 



Distribution. — Gulf of Mexico betv^^een Mississippi delta and 

 Cedar Keys, Fla., at 27 fms. Also Antilles to Guadeloupe. 

 Pleistocene of Fla. Pliocene, Caloosahatchie beds. 



varians d'Orbign}^, Voy. Ame'r Me'rid., p. 456, pi. 54, f. 7-10, 

 1843; Tryon, Man., 8, p. 170, pi. 49, f. 22, 23, '86; Dall, 

 Tr. W. L S., 3, p. 305, '92. 



Distribution. — Southwest Florida to Rio de Janeiro. Plio- 

 cene, Caloosahatchie beds. Oligocene, Tampa silex beds. 



erectus Dall, in Agassiz, Three Cruises of the Blake, 2, p. 71, f. 

 297, '88; Bull, M. C. Z., 18, p. 262, pi. 38, f. 4, '89; Bull. 

 37, U. S. N. M., p. 144, pi. 38, f. 4, '89. 



Distribution. — Antilles and West Florida. 37-805 fms. 

 Pliocene, Caloosahatchie River, Fla. 



Genus SIPHON SUM 



nebulosum Dillwyn, 2, p. 1076, No. 19; Tryon, Man., 8. p. 184, 

 pi. 54, f. 87, 1886; Dall, Bull. 37, U. S. N. M., p. 144, '89. 



Distribution. — East and West Florida to Tortola. 



Genus SILIQUARIA Bruguiere 



squamata Blainville, Diet, des Sci. Nat., 49, f. 213; Tryon, Man., 



