I03 Bulletin 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. htmbricalis Linn. (See Bull. M. C. Z., 18, p. 261, '89) 

 but the true Liunaean Inrnbricalis is Oriental. 



nigricans Dall, Pr. U. S. N. M., 6, p. 334, 1883, {d.s lumbricalis 

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



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

 Genus PETALOCONCHUS Lea 



irregularis d'Orbigny, Moll, Cuba, i, p. 235, pi. 17, f. 16, 18, '42, 

 (as Ver7?ieius)\ Dall, Bull. 37, U. S. N. M., p. 144, 18S9; 

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



Distribution. — Gulf of Mexico between Mississippi delta and 

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

 Pleistocene of Fla. Pliocene, Caloosahatchie beds. 



varians d'Orbigny, 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. I. 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! UIYI 



nebuiosum 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., 



