S54 



On the Geology of Ciitclu 



[Oct, 



ed ; sides gaping ; the anterior small, separated from the rest of the 

 shell by an obscure depression ; the posterior rounded, aliitle flattened. 

 Length 1 ineh, width more than 1| inch • the specimen being broken 

 we have not the measure complete. 

 Loc near Charee. 



Corhula lyrata. Roiihded, triangular, convex, transversely ribbed ; 

 ribs about 15, prominent, rounded posterior side of the larger valve 

 formed into a distinct lobe, convex, nearly smooth— the beak of the same 

 Talve much incurved, the margin tootlied. Length and breadth nearly 

 equal, sometimes exceeding half an inch. 



Occurs grouped in dense masses with Trigonia Pulhis, a smooth Uncu- 

 la, &c. 



Loc. near Charee. 



Astarie unilateralis. Transversely obovate, anteriorly truncated, con- 

 vex, rather flattened and marked with 8 or 1) concentric rugae near the 

 beaks. Anterior side at right argles with the hinge line ; lunette con- 

 cave, ovate, pointed. V^idth greater than the length, but variable in 

 proportion, generally about inch. 



Loc. near Charee. 



Astarte pisiformis. Nearly globose, with pointed beaks ; marked 

 with 8 or 9 sharp transverse ridges ; edge toothed. Length 3 lines. 

 Loc. near Charee. 



Trigon'm costata^ var. This shell varies slightly both in form and 

 markings— generally the form is between that of T. costata, Parkinson or 

 M. C. t. 85 ; and T. elongata, of M. C. t. 431 ; which Lamarck, appa- 

 rently with justice, considers to be but one species. 



Loc. near Charee. 



Trigonia Pidlus (M. C. t. 508, f. 2, 3.) ? The markings on the pos- 

 terior side are not so regular as in the English specimens, but there 

 is no other difference. 



Loc. near Charee. 



(Fossils from the Upper Secondary Formation, Cutch.) 



Cuculloea virgaia. Transversely elongato-quadrate, with projecting 

 incurved beaks, very convex, marked v-ith many longitudinal irregular, 

 sharp ribs ; posterior margin obliquely truncated. Length 1^ inch, 

 width 2i inches. 



Loc. Between Hubby e and Joorun. 



