156 BULIyBTiN 31 156 



the type made while visiting the Academy some time ago. 



We have obtained no specimens of this species nor have we 

 seen any in other collections. 



Psammobia eborea Conrad, PI. 48, Figs. 8- 11 



P, eborea Con., Foss, Sh. Tert. Form., 1833, p. 42. 



P. ( Psammocola) eborea Con. Amer. Jr. Conch., vol. i, '65, p. 4. 



P. eborea Dall, Trans. Wag. , III, 1900, pp. 976, 978. 



Conrad'' s origifial description. — Shell oblong-oval, compressed ; pos- 

 terior side longest and obliquely truncated at the end ; dorsal margin 

 straight ; beaks slightly prominent. 



Speaking of the incremental ridges in a lower Eocene form 

 oi Psammobia Dall continues: "The latter often form in P. 

 eborea small, sharp, concentric waves dorsally, but not raised 

 laminae, as in P.filosa. 



This is very close to P. ozarkana Har., (these Bulletins, vol. 

 2, p. 257, pi. 18, fig. 14, pi. 19, fig. 8) but is less elongate &c as 

 there noted. 



This is by no means so rare as the preceding species. There 

 are several specimens at the Philadelphia Academy and our own 

 collection contains three. 



7>/^.— Phila. Acad. Nat. Sci. 



Horizon. — Claiborne Eocene. 



Specimens figured. — Paleont. Museum Cornell Univ. 



Locality. — Claiborne, Ala. 



Egerella triangulata Lea, PI. 48, Figs. 12, 13 



Egeria triangulata Lea, Cont. to Geol., 1833, p. 51, pi. i, fig. 20. 

 E. Bucklandii, ibid, p. 52, pi. i, fig. 21. 

 Donax liinatula Con., Foss. Sh. Tert. Form., 1833, p. 42. 

 E. donacea Con., Amer. Jr. Conch,, vol. i, 1865. p. 146, pi. 11, fig. 12. 

 f Donax {Egerella') veneriformis var. tig a de Greg., Mon Faun. Eoc. 

 Ala., 1890, p. 222, pi. 35, figs. 4-9. 



Lea' s original description. — Shell triangular, inequilateral, smooth, ob- 

 tusely angular before, acutely angular at top, gibbous over the umbo — anter- 

 ior to which it is flattened; substance of the shell rather thin ; posterior and 

 anterior slopes flattened ; beaks elevated, pointed, incurved ; basal margin 



