TRANSACTIONS OF WAGNER 

 842 



TERTIARY FAUNA OF FLORIDA 



criminate the young of alabainicnsis from the young of C. dcnsata, 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 ima from the figures; it much 

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

 of the Mex. Boundary Rep., i., p. 161, 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. 

 Corbitlii tit-lisa fa Conr., Proc. Acad. Nat. Sci. IMiila., vii., p. 258, 1855; Wailes, Rep. 



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

 Corbula nasiita var. tccla Gfegorio, Mon. Claib., p. 231, pi. 37, figs. 911, 1890. (Young 



shell.) 



Claibornian Eocene of Orangeburg, South Carolina; Clarksville and 

 Claiborne, Alabama, and Carson's Creek, Mississippi ; Jacksonian Kocene 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 sulcatc and much more trapezoidal than C. alabainicnsis, with 

 which it is usually associated. 



Corbula (Cuneocorbula) compressa Lea. 



Corbula compressa Lea, Contr. Geol., p. 47, pi. i, fig. 15, 1833; Gregorio, Mon. Claib., 

 p. 233, pi. 36, figs. 34, 35 (not fig. 33 <?-<:), 1890; Cossmann, Ann. de Geol. et I'al., 

 12, p. 6, 1894. 



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

 Mississippi; L. 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 . -lltiriclii Meyer, Hull. 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. 



