136 MOLLUSCA OF THE Gui.F OF MEXICO 106 



Also off Georgia and Fernandina, East Florida. Least 

 depth, 294 fms. 



Genus LSTTORIl^A Ferussac 



ziczac Gmelin, S3^st. Nat., p. 3587, 1792, (as Trochus)\ Reeve, 

 Conch. Icon., 10, pi. 11, f. 57, 1857; Tryon, Man., 9, p, 

 251, pi. 45, f. 5, 1887; Dall, Bull. 37, U. S. N. M., p. 146, 

 '89; Dall and Simpson, Bull. U. S. Fish Com., i, p. 429, 

 1901. 



Distribution. — Florida Keys west to Texas and South to 

 Barbados. 



augulifera Lamarck, Anim. s. Vert., 7, p. 54, 1882, (as Phasian- 

 ella); Dall, Bull. 37, U. S. N. M., p. 146, '89; Dall and 

 Simpson, Bull. U. S. Fish Com., i, p. 430, 1901. 



Distribution. — West Florida and Texas to the Antilles and 

 Cartagena, Colombia. 



mespilum Muhlfeld, Verb, Berl. Ges. Nat., i, p. 219, pi. 8, f. 8, 

 1824, (as Helix); Tryon, Man., 9, p, 252, pi. 45, f. 16, 

 1887; Dall, Bull. 37, U. S. N. M., p. 146, '89; Dall and 

 Simpson, Bull. U. S. Fish Com., i, p. 430, 1901. 



Distribution. — Texas to Barbados. 



irrorata Say, Jour. A. N. S. Phila., (i), 2, p. 239, 1822, Tuo- 

 mey and Holmes, PI. Foss. S. Car., p. 119, pi. 26, f. 5, 

 1857; Post. — PI. Foss. S. Car., p. 91, pi. 14, f. 5, i860; 

 Tryon, Man., 9, p. 246, pi. 43, f. 48, '87: Dall, Bull. 37, U. 

 S. N. M., p. 146, pi. 69, f. 6, '89; Tr. W. I. S., 3, p. 320, 

 '92; Singley, 4th Ann. Rept. G. S. Texas, p. 340, '92: Van- 

 atta, Pr. A. N. S. Phila., 55, p. 758, 1903; Johnson, Occ. 

 Pa, Bost. Soc. N. H., 7, p. 121, 1915. 



Distribution. — Massachussetts to Jamaica. Culf coast: 

 Cedar Keys, and Calhoun and Washington Cos., West Fla., 

 Chandeleurs, Weeks Island, Point au Fer, La.; Matagorda, 

 Bspiritu Santo Bays and Galveston, Tex. Pleistocene, New 

 Orleans pumping station No. 7. 



