MoLivUSCA OP THE Gulf op Mexico 54 



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

 Isl., Texas. Pleistocene, Nev/ Orleans v^'ell 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. 



(IVSesorhyos) meektana Dall, Bull. M. C. Z., 18, p. 172, pi. 36, f. 

 7, i88q; 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 fms. The first living 

 species of Mesorhytis known, the t3^pe being the Cretaceous 

 species, gracileniis Meek. 



Genus FUSll^OS Rafinesque 



tsmsssus Dall, Bull. M. C. Z., 18, p. 166, 1889; {iisFusus); Bull. 

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



Distribution. — Gulf of Mexico, between Mississippi delta 

 and Cedar Keys, 60 fms. ; betvi/een Cedar Keys and Dry 

 Tortugas, 27 fms. Also near Cuba. 



euGOsmius Dall, Bull. M. C. Z., iS, 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. 



COUel 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. 



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



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

 95 fms. 



IS 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. 



