66 



Buxj^TiN 34 



98 



Tex. Pleistocene : Labelle and Osprey, Fla., New Or- 

 leans well of 1856, Lake Borgne borings. Pliocene : Ca 

 loosahatchie and Shell Creek, Fla. 



Genus PRQTOCARDBA Beyrich 

 peramabilis Dall, B. M. C. Z., 9, p. 132, 1881, (as Fulvia); Idem, 

 12, p. 269, pi. 4, f. 7, '86 ; Bull. 37, U. S. N. M., p. 52, 

 pi. 4, f. 7, pi. 40, f. 4, '89 ; Proc. U. S. N. M., 23, p. 388, 

 '01 ; Johnson, Occ. Papers, Bost. Soc. Nat. Hist., 7, p. 

 69, 1915. 



Distribution. — Rhode Island to Grenada, W. I., 18-164 fms. 

 Gulf of Mexico, west of Florida, 50 fms. The ancestral 

 form of this very lovely deep sea shell appears to be P.. 

 islahispaniolce Maury, from the Dominican Miocene. 



Genus D0S3MA Scopoli 



discus Reeve, Conch. Icon., 6, pi. 2, f. 9, 1850, (as Artemis)-, 

 Deshayes, Cat. Conch. Brit. Mus., p. 10, '53; Tryon, 

 Am. Marine Conch., p. 161, pi. 30, p. 399, '73 ; Dall, 

 Bull. 37, U. S. N. M., p. 56, pi. 89, fig. 1, pi. 90, fig. 1, 

 '89 ; Singley, 4th Ann. Rept. Tex., p. 328, '92 ; Dall, 

 Proc. U. S. N. M., 26, p. 366, '03 ; Tr. W. I. S., 3, p. 

 1232, '03 j Vanatta, Proc. A. N. S., Phila., 55, p. 757,, 

 1903. 



concentrica Conrad, Am. Marine Conch., p. 55, pi. 12, 1831 ; 

 Am. Jour. Sci., 2dSer., 2, p. 393, 1846; Holmes, Post-PL 

 Fos. S. C, p. 37, pi. 7, fig. 4, i860; Hilgard, House of 

 Rep. Ex. Doc, 1, pt. 2, p. 887, 1878. Not Venus con- 

 centrica Born, 1780. 

 Distribution. — New Jersey to Vera Cruz. Pliocene to Recent. 

 Gulf coast. — Recent : Ft. Barranca, St. Joseph's Bay, 

 Crooked Island, &c, Fla. ; Horn Island, Miss. ; Point au 

 Fer, Chandeleurs, La. ; Galveston, Corpus Christi, Tex. 

 Pleistocene : Osprey, Fla. ; Grand Chenier (?), New Or- 

 leans artesian well of 1856 at 546 feet, Lake Borgne bor- 

 ings (Hilgard's concentrica), New Orleans pumping station 

 No. 7, New Orleans Gymnasium well at 1200 feet,, 



