TRANSACTIONS OF WAGNER 

 842 



TERTIARY FAUNA OF FLORIDA 



criminate the young of alabainicims from the young of C. dcusata, which is 

 often mixed with it, and which Gregorio has described as a variety tccla of this 

 species. I am unable to identify his variety iina from the figures ; it much 

 resembles some of the forms of Grcgorioi Cossmann. The C. iiasiita Conrad 

 of the Mex. Boundary Rep., i., p. 16 [, pi. xix., fig. 4, 1857, from western 

 Texas, is obviously a distinct species, which may take the name of C. Conradi. 



Corbula (Cuneocorbula) densata Conrad. 

 Corhula dcnsaia Conr., Proc. Acad. Nat. Sci. Phila., vii., p. 258, 1855; Wailes, Rep. 



Geol. Miss., p. 289, pi. 14, fig. 9, 1854. 

 Corbula nasuta var. tccln Gregorio, Men. Claib., p. 231, pi. 37, figs. 9-1 1, 1890. (Young 

 shell.) 



Claibornian Eocene of Orangeburg, South Carolina; ClarksviUe and 

 Claiborne, Alabama, and Carson's Creek, Mississippi ; Jacksonian Eocene at 

 Jackson, Mississippi ; Wailes. 



This is a large, irregular, coarse, and strong species, more common in the 

 Claiborne sands than in the Jacksonian, from which it was first described. It 

 is more coarsely sulcate and much more trapezoidal than C. alabaiinciisis, with 

 which it is usually associated. 



Corbula (Cuneocorbula) compressa Lea. 

 Corbiihi coinpri'ssa Lea, Contr. Gcol., p. 47, pi. I, fig. 15, 1833; Gregorio, Mon. Claib., 

 p. 233, pi. 36, figs. 34, 35 (not fig. 33«-i^), 1890 ; Cossmann, Ann. de Geol. et Pal., 

 12, p. 6, 1894. 



Claibornian of Claiborne, Mississippi, and Jacksonian of Clarke County, 

 Mississippi ; E. C. Johnson. 



This small species is not very well represented by Lea's figure, which is 

 too long, and his type specimen is defective just in front of the beak, where 

 some boring animal has made a hole. It is a recognizable form, however, 

 best recognized by its compression, and most likely to be confounded with the 

 young of densata. 



Corbula (Cuneocorbula) Aldrichi Meyer. 

 Corbula AM?ichi M&yex, Bull. Ala. Geol. Surv., i., p. 83, pi. i, fig. 21, 1886. 



Chickasawan Eocene of Wood's Bluff, Alabama. 



This form is best recognized by its feeble umbonal sculpture and the 

 radial sculpture, which is quite exceptional in this genus. 



