38 



line of series of hinge teeth widely interrupted, and transverse 

 at the extremities. 



Locality, Clai borne, A lab. 



Cab. Acad. N. S. 



CORBQLA. 



C. nasuta. PI. 20. fig. 2. 



Shell ventricose, beaks subcentral ; posterior side produced, 

 angular and carinated ; anterior side rounded ; valves with 

 concentric sulci. Length f of an inch. 



Locality, Clai borne, Alab. 



Cab. Acad. N. 8. 



ASTARTE. 



1. A. callosa. PI. 20. fig. 8. 



Shell rounded, compressed, with concentric sulci, stronger 

 on the middle ; slightly angulated and compressed posteriorly ; 

 beaks not compressed, rather prominent and acute ; lunule ra- 

 ther deeply impressed, nearly smooth; posterior muscular im- 

 pression a little elevated ; inner margin crenulated. 



The sulci of this species have considerable resemblance to 

 those of A tellenoides, (nobis.) 



2. A. proruta. PI. 20. fig. 4. 



Shell longitudinally suboval ; umbonal slope terminat- 

 ing anteriorly in a prominent angle; surface with dis- 

 tinct sulci, obsolete beneath, and terminating posterior to the 

 umbonal slope in wrinkles: apex acute, not compressed; lu- 

 nule narrow, depressed, smooth ; margin crenulated.. 



Locality, Clai borne, Alab. 



Cab. Acad. N. S. 



PLICATULA. 



P. filamentosa. PI 29. fig. 5. 



Shell suborbicular, narrowing towards the apex, much com- 

 pressed ; with seven costa? ; and densely imbricated with 

 small, irregular, concentric wrinkles, and with minute radiat- 

 ing lines.' Breadth and length about f of an inch. . 

 Locality, Clai borne, Alab. 

 Cab. Acad. N. S. 



[60] 



