46 Bulletin 34 78 



Single}', Fourth Ann. Rept. Geol. Surv. Texas, p. 326, 

 1892. 



Crassatellites {Crassinella) lunulatiis Dall, Trans. Wag. Inst. 

 Sci., 3, p. 1477, pi. 49, fig. 15, 1903 ; Vaughan, Publ. 133, 

 Carn. Inst., p. 171, 1910. 



r' vtactracea Linsley, Am. Jour. Sci., 48, p. 275, 1845 ; John- 

 son, Occ. Papers, Bost. Nat. Hist. Soc, 7, p. 45, 1915. 

 Distribution. — Tentatively including the northern form, C- 

 madracea, as identical. — Cape Cod to Barbados, 3-100 fms. 

 Miocene to Recent. Gulf coast. — Recent : Indian Pass, 

 St. Joseph's Ba}^, Crooked and Sarasota Isls. , Fla. ; Gal- 

 veston. Pleistocene: Labelle, Fla., New Orleans pump- 

 ing station No. 7, New Orleans artesian well of 1856, New 

 Orleans Gj^mnasium well at 1200 feet, I^ake Borgne bor- 

 ings, Knapp's Wells, Terrebonne Parish No. 2 at 1190- 

 i43o> 1542- 1 632, 1 780- 1 790, 1800, No. 2 from the surface 

 to 700 feet, 570-700 700-780, 790-830, 1043, 1 150-1200, 

 1 796-1842 feet. Pliocene : Caloosahatchie, Shell and Alli- 

 gator Creeks, Fla. Miocene : Sharp Benckenstein No. i 

 well, Jennings, I^a., at 2050 feet ; Jennings He\'wood Oil 

 Syndicate's well No. 29 at 1941-1961 feet. Type locality 

 Miocene of Suffolk, Va. 



Genus CYRENA Lamarck 

 caroiiniana Bosc, Hist. Nat. des Coq., 3, p. 37, p. 18, f. 4, 1802, 

 (as Cydas); Say, Amer. Conch., 7, pi. 42, '33 ; Dall, Tr. 

 W. I., 3, p. 1447, 1903. 

 caroliiiiensis Lamarck, An. s. Vert., 5, p. 553 ; Holmes, 

 Post-Pl. Fos, S. Car., p. 31, pi. 6, f. 7, '60; Mitchell, List 

 Tex. Sh., p. 5 ; Dall, Bull. 37, p. 56, '89. 

 floridana Sowerby, Conch. Icon., pi. 18, f. 102, '78. Not of 

 Conrad, 1846. 

 Distribution. — In brackish water, vS. Carolina to Cuba. Pleis- 

 tocene to Recent. Gulf coast. — St. Marks, Fla., Week's 

 Isl., La., Lavaca and Carancahua Bays, Tex, Pleistocene: 

 Osprey, North Creek, Fla. 

 floridana Conrad, Proc. Acad. Nat. Sci., Phila., 3, p. 23, pi. i, i. 



