﻿NEW CRETACEOUS AND EOCENE FOSSILS. 283 



Locality. — Eufaula, Alabama. Tuomey's collection. 

 A small, very perfect shell, elegantly sculptured. 



CORBULA, Brug. 



Corbula Eufaulensis. Triangular, elevated ; larger valve profoundly ventricose, 

 furnished with about twenty very elevated reflexed ribs ; beaks almost terminal ; 

 umbonal slope carinated and the area behind it very small and laminated ; posterior 

 extremity truncated. 



Locality. — Eufaula, Alabama. Tuomey's collection. 



Remarkable for its large, prominent umbo. 



PLICATULA, Lam. 



Plicatula tetrica. PL 46, fig. 26. Adhering, ovate ; ribs ten or twelve, pro- 

 minent, large, distant, bearing oblique, prominent, foliated spines ; upper valve tlat, 

 slightly convex. 



Locality. — Tippah Co., Miss. Dr. Spillman. 



Remarkable for its large ribs and thick prominent spines, and the specimens are in 

 excellent preservation. It is distantly related to P. aspera, Sowerby. 



Plicatula Saffordi. PL 46, fig. 34. Ovate, compressed ; radii numerous, linear, 

 little prominent, multispinous ; upper valve flat. 

 Locality — Tennessee. Prof. Safford. 

 A beautiful species with numerous, frequently erect, small foliated spines. 



PECTEN, Lin. 



Pecten argillensis. Suborbicular, very thin, compressed ; radiated only on the 

 upper part with minute lines; disk covered with closely arranged, fine lamelliform 

 strise, except on the umbo and adjacent parts where they are distant; posterior 

 margin opposite the ear carinated. (Upper valve.) 



Locality- — Tippah Co., Alabama. Dr. Spillman. 



Pecten Mississippiensis. Ovate, compressed, very thin ; upper valve with about 

 eight distant, narrow, subangular ribs, between which are less prominent ribs, two to 

 three in number ; disk covered with minute, closely arranged concentric lines. 



Locality. — Tippah Co., Miss. Dr. Spillman. 



Shell extremely thin, and having apparently equal ears, rather large in size. 



Pecten simplicius. PL 46, fig. 44. Ovate, thin, smooth and shining ; ears moder- 

 ate, nearly equal; both valves slightly convex; the upper valve slightly tumid on 

 the umbo ; inner margin minutely crenulated. 



Locality. — Eufaula, Alabama. Tippah Co., Mississippi. 



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