84 MoivLUSCA OF THK Gui.F OF MEXICO 54 



La.; Galveston, Matagorda, Corpus Christi, and Mustang 

 IsL, Texas. Pleistocene, New Orleans well of 1856, and 

 pumping station No. 7; Orient and Labelle, West Fla. 

 The Pliocene shell of the Caloosahatchie beds is the related, 

 but slenderer, F. apicina DalL 



(iViesorhytEs) meekiaoa Dall, Bull. M. C. Z., i8, p. 172, pi. 36, f. 

 7, 1889; Bull 37, U. S. N. M., p. 112, pi. 36, f. 7, '89. 



Distribution. — Gulf of Mexico, Blake Stations 16 and 20, at 

 292 and 220 fms. Also off Cuba, 400 frns. The first living 

 species of Mesorhytis known, the type being the Cretaceous 

 species, gracilentis Meek. 



Genus FOSir^llS Rafinesque 



timessus Dall, Bull. M. C. Z., 18, p. 166, 1889; (as ; Bull. 

 37, U. S. N. M., p. 112, '89. 



Distribution. — Gulf of Mexico, between Mississippi delta 

 and Cedar Keys, 60 fms. ; between Cedar Keys and Dry 

 Tortugas, 27 fms. Also near Cuba. 



eucosmiiss Dall, Bull. M. C. Z., 18, p. 167, pi. 35, f. 5, 1889; 

 Bull. 37, p. 112, pi. 35, f. 5, '89. 



Distribution. — Gulf of Mexico, west of Florida. Also Bar- 

 bados, 27-1 II fms. 



COUes Petit, Journ de Conch., 4, p. 249, pi. 8, f. i, 1853; Dall, 

 Bull. M. C. Z., 18, p. 167, '89. 



Distribution. — Gulf of Mexico, between Tampa and Dry 

 Tortugas, 26 fms. 



alcimus Dall, Bull. M. C. Z., 18, p. 170, 1889. 



Distribution. — Gulf of Mexico, 100 miles north of Yucatan, 

 95 fms. 



amiantus Dall, Bull. M. C. Z., 18, p. 169, pi. 15, f. 11, 1889; Bull. 

 37, U. S. N. M., p. 112, pi. 15, f. II, '89. 



Distribution. — Gulf of Mexico, Blake station 2, at 805 fms. 



