71 MOUATSCA OF THE GULF OF MEXICO 39 



57, f. 15, 1903. 

 Distribution. — Georgia to Honduras. Pliocene to Recent. 

 Gulf coast. — West Fla.; Galveston, Matagorda, Tex. Plio- 

 cene : Shell Creek, Fla. 

 inaequivalvis Schumacher, Essai, p. 115, 1817 ; Dall, Bull. 37, p. 

 64, '89 ; T. W. I. S., 3, pt. 6, p. 1528, 1903. 

 Distribution. — Antilles. Texas (?) 

 papyracea (Say) Conrad 



Anatiim papyratia Say, Jour. Acad. Nat. Sci. Phila., 2, p. 



314, 1822. 

 Periploma papyracea Conrad, Am. Jour. Conch., 2, p. 70, 

 pi. 4. f. 9 ; Idem, p. 281, pi. 15, f. 6, '66 ; Dall, Bull. 37, 

 p. 64, '8g. 

 Distribution. — West Florida (?) to Santa Cruz. 



Genus THRACIA Leach 



(iistorta Montagu 



My a distorta Montagu, 1808. 



Thracia distorta Dall, Bull. 37, p. 64, '89; Tr. W. I., 3. 

 pt. 6, p. 1523, 1903. 

 Distribution. — Gulf of Mexico to Honduras. West Florida 

 andTexas. Type of .section Ixartia Leach, 

 phaseolina (Lamarck) Philippi, Moll. Sic. i. t. i, f. 7, 1836 ; Dall, 

 B. M. C. Z., 9, p. no, '81 ; Bull. 37, p. 64, '89. 

 papyracea Jeffreys, Brit. Conch., 5, pi. 48, f. 4. 

 Distribution. — Florida to Yucatan and England. Gulf, Yuca- 

 tan Strait, 640 fms. Florida Keys, shallow water. 

 stimpsoni Dall, B. M. C. Z., 12, p. 307, 1886 ; Bull. 37, U. S. N. 

 M., p. 64, '89. 

 Distribution. — Gulf of Mexico between Tampa and Tortugas, 

 28 fms. 



Genus ASTHENOTHAERUS Carpenter 

 hemphilli Dall, B. M. C. Z., 12, p. 308, 1886 ; Bull. 37, p. 64, '89. 

 Distribution. — Gulf of Mexico : West Fla., 17 fms., Marco, 

 Lee Co., Fla., 2 fms. 



