43 MOLI.USCA OF THE GuLF OF MEXICO 12 



CLASS GASTROPODA 

 ORDER PTEROPODA 



Genus CAVOLINA Abiidgaard 



infiexa Lesueiir Nonv. Bull. vSoc. Philoni., 3, p. 2S5, pi. 5, f. 3, 

 1813, {-AS \Hyalcea) ; Dall, Bull. U. S. Nat. Mu.s., 37, p. 82, 

 1SS9; Proc. U. S. Nat. Mus., 37, p. 197, 1910. 



DLstributiou. — West Atlantic, Lat. 42°N. — 42° S., East 

 Pacific, Lat. 13° N.— 42° S. Gulf of Mexico, West Florida. 

 Pelagic. Pleistocene to Recent. 



uncinata Rang, in d'Orbigny's,Vo^^ Ame'r Me'r., p. 93, pi. 5, 

 f. 11-13, 1836, {2iS Hyalcea) ; Dall Bull. 37, U. vS. N. Mus., 

 p. 82, pi. 66, f. 116, 1889; Proc. U. S. N. Mus. 37, p. 198, 

 1910; Johnson, Occ. Papers, Boston Soc. Nat. Hist., 7, p. 



156,1915- 



Distribution.— West Atlantic, Lat. 4o°N.-4o°S. East Pacific, 

 Lower California to Ecuador and Galapagos Isls. Gulf of 

 Mexico; West Florida. Pelagic. Pleistocene to Recent. 



(Diacria) trispinosa Lesueur, in Blainville; Diet, des Sciences Nat. 

 22, p. 82, 1821, (as HyalcBa); Gould, Inv. Ma.ss., p. 504, 

 1870, {Z.S Diacria)] Dall, Bull. 37, p. 82, pi. 66, f. 115, 1889; 

 Sumner, Bull. Bur. Fish., 31, pt. 2, p. 703, 1913. Johnson, 

 Occ. Pap. Bost. Soc, 7, p. 157, 1915. 



Distribution.— West Atlantic, Lat. 6o°N.— 40° S. Gulf of 

 Mexico, West Florida. Pelagic. Pleistocene to Recent. 



Genus CLIO Linnaeus 



pyramidata Linnaeus, Systema Naturae, 12th ed., p. 1094, 1767; 

 Dall, Bull. 37, U. S. N. M., p. 80, 1889. {a.s Cleodora); 

 Proc. U. S. N. M., 37, p. 19S, 1 910; Johnson, Occ. Pap. 

 Bost. Soc, 7, p. 158, 1915. 



Cleodora lanceolata Souleyet, Zool. Bonite, 2, p. 179, pi. 6, f 

 17-25, 1852. 

 Distribution. — Atlantic, Spitzbergen to Lat. 40° S. South- 



