119 St. Maurice and Claiborne Pelecypoda 119 



St. Maurice horizon, with very different muscular impressions 

 (if we can trust the figures of Clark) different outline, different 

 or stronger dentition &c, we prefer to retain the Alabama de.sign- 

 ation for the Alabama specimens. 



Types. — Paleont. Mus. Cornell Univ. From the Sabine 

 Eocene beds at Ozark, Ala. 



Horizon. — Sabine and St. Maurice Eocene. 



Specimens figured. — Paleont. Mus. Cornell Univ. 



Localities. — Base of Bluff, Claiborne ; Lisbon and Ozark, in 

 the St. Maurice Eocene. Woods Bluff and Ozark, in the Sabine 

 Eocene. Marble Quarry, Winn Parish, La. ; Vance's Ferry, 

 S. C. ; 2 miles S. of Meridian, Miss. (U. S. N. M.) 



Loripes SUbvexa Conrad, PI. 39. Figs. I, (2, 3,4.)? 



L. subvexa Con., Foss. Shells Tert. Form., 1832, p. 40. 



L. subvexa Con., Am. Jr. Sci., vol. i, 1846, p. 403, pi. 4, fig. 14. 



Cyclas subvexa Con., Amer. Jr. Conch., vol. i, 1865, p. 8. 



Liicina {Loripes^ subvexa de Greg., Mon. Faun. Eoc. Ala., 1890, p. 



207, pi. 29, fig. 14. 

 Lucina subc'exaDaW, parti}ii, Trans. Wag., Ill, 1903, p. 1352. 



Conrad's original description. — Shell suborbicular ; ventricose ; with 

 fine concentric and minute obscure radiating lines, posterior side with an 

 obscure fold, anterior side elevated and subangulated above, hinge edentu- 

 lous ; anterior muscular impression not profoundly elongated ; cavity very 

 capacious ; surface punctate. 



In 1846 Conrad adds in the description given in the American Journal 

 of Science : A rare species. I have but one valve, which is thin about the 

 basal margin, thicker above, with a rough unequal radio-punctate interior ; 

 the lunula small and impressed, and the hinge plate narrow and without 

 teeth. 



There is a fragment of a specimen we would generally refer 

 to ''Loripes'' still in the Conradian Collection at the Phila. 

 Academy, about 25 mm. in diameter, that is probably Conrad's 

 t3-pe. It shows well the long anterior muscular scar, the punc- 

 tate or pitted character and the diagonal long interior impression 

 common to specimens of this genus. 



So far as we are aware no one has found this shell in the 



