6o MOLLUSCA OP THE GULF OF MEXICO 30 



Distribution. — Hatteras to Texas 2-50 fms. Lower Miocene 

 to Recent. Gulf coast: Cedar Ke}^s & St. Marks, Fla.; 

 Cameron, La.; Galveston, Tex. Pleistocene, North Creek, 

 Manatee and Labelle, Fla.. The variety lutescens E. A. 

 Smith, ranges from N. Carolina to West Florida. It is 

 more distinctly reticulated than the typical form. 



nassuSa Ball, Bull. M. C. Z., i8, p. 66, pi. 36, f. 8, 1889; Ball 

 & Simpson, Bull. U. S. Fish Com., i, p. 383, 1901. 



Bistribution. — Martinique. Also Gulf of Mexico, Lat. 23° 

 N., Lon. 88° W., at 95 fms.; Yucatan Strait, 640 fms. 



limatula Ball, Bull. M. C. Z.,i8, p. 66, 1889; Bull. 37, U. S. N, 

 M., p. 94, '89. 



Bistribution. — N. Carolina to Barbados. Also Gulf of Mex- 

 ico between Mississippi delta and Cedar Keys at iii fms. 



texana Ball, Nautilus, 12, p. 45, Aug., 1898; Pr. U. S. N. M., 

 24, p. 502, pi. 29, f. 8, 1902. 



Bistribution. — Matagorda Island, Texas. Collected by Hon. 

 J. B. Mitchell. Very rare. 



galvestonensis Harris, Bull. Am. Pal., vol. i, p. 98, pi. 3, f. 5, 

 1895. 



Bistribution. — Upper Miocene, Galveston well at 2387-2871 

 1910. 



calhounensis Maury, Bull. Am. Pal., No. 21, p. 4, pi. i, f. 3, 

 1910. 



Bistribution. — Lower Miocene, Chipola marl, Bailey's 

 Ferry, Fla., and Bascom No. 2 well Mobile, Alabama, at a 

 depth of 1 24 1 feet, Chipola horizon. 



indenta Conrad, Cited by Mr. Aldrich from the Bascom No. i 

 well, Mobile, Ala. at 1500-1556 feet. 



langdoni Ball, Pr. U. S. N. M., 18, p. 39. i895; I'r- W. Inst., 

 3, pi. 59, f. 27, 1903. 



