MoUvUSCA OF THE Gui,F OF MEXICO 



97 



Distribution. — Galveston, Texas, to Vera Cruz, Mexico, 

 rcemeri Philippi, Roemer's Texas, p. 452, 1849 ; Singley, 4th 

 Ann. Rept. Texas, p. 328, 1892 ; Dall, Nautilus 5, p. 125, 

 1892 ; Mitchell, List Tex. Sh., p. 13 ; Dall, Tr. W. I. S. , 

 3, p. 969, 1900. 



Distribution. — Texas to Vera Cruz, Mexico. Gulf coast. — 

 Galveston (type locality), Corpus Christi and Matagorda 

 Island, Tex. 



variabilis Say, Jour. A. N. S. Phila., 2, p. 305, 1822 ; Coues, 

 Proc. A. N. S., Phila., p. 137, '71 ; Tryon, Am. Mar. 

 Conch., p. 154, pi. 27, f. 378-379, *73 : Hilgard, Rept. of 

 Chief of Engineers to Sec. of War, p. 358, '70 ; House of 

 Rep. Ex. Doc. 1, pt. 2, pp. 887, '78 ; Dall, Proc. U. S. 

 N. M., 6, p. 338, '83 ; Bull. 37, U. S. N. M., p. 58, '89 ; 

 Tr. W. I. S. 3, p. 969, 1900 ; Vanatta, Proc. A. N. S. 

 Phila., 55, p. 757, 1903. Not of Tuomey and Holmes, 

 1857, which isfossor. 



Distribution. — Hatteras to St. Thomas, W. I. Pleistocene to 

 Recent, Gulf coast — Recent : Ft. Barranca, Indian Pass, 

 St. Joseph's Bay, Crooked Isl., etc., Fla. ; Horn Island, 

 Miss. Pleistocene : New Orleans artesian well of 1856 

 at 41 and 76 feet, and Lake Borgne borings (Hilgard). 



Note. — Coues studied the habits of this mollusc at Fort Macon 

 where it is very abundant. 

 (Machaerodonax) galvestonensis Harris 



carinata (Hanley) Harris, 4th Ann. Rept. Geol. Surv. Tex., 



p. 121, 1892, (pub. 1893). 

 carinata var. galvestonensis Harris, Bull. Am. Pal., vol. 1, 

 No. 3, p. 92, 1895. 



Distribution. — Miocene of the Galveston artesian well, rang- 

 ing in depth from 2552 to 2920 feet (Harris). 



Note. — Donax obesa has been cited by Dall (Bull. 37, U. S. N. 

 M., p. 58, 1889) and by Vanatta (Proc.A. N. S. Phila., 

 55, P- 757, from the Gulf at Indian Pass, St. Jo- 



seph's Bay, Crooked Isl., Fla. ; Horn Island, Miss., and 



