PLEIOCENE FOSSILS. 5] 



This little shell, which is closely related to if not identical with a recent species of the 

 coast of Florida, is readily distinguished by its prominent rather rough ribs, short hinge, 

 and truncate buccal margin. The teeth are numerous, and uninterrupted. Ligament 

 area small. 



Plate XVII. Fig. 6, A large variety of this species. 

 " 6a, Interior of right valve. 

 " 6b, Exterior of left valve. 



Locality. Darlington District. 



Museum, College of Charleston. 



PECTUNCULUS TRANSVEESTJS.— {New Species.) 

 Plate XVII. Pig. 6c. 



P. testa ovato-transversa, cequilateralis; latere anali interne rugato, margine palliali 

 tenuiter crenulata. 



Description. Shell ovate transverse, equilateral; anal side on the interior wrinkled; 

 pallial margin finely crenulated. 



This specimen, although a cast, is so very characteristic that it cannot be confounded 

 with any other species. The length is nearly twice the breadth, and the teeth are closer 

 on the anal than on the buccal ridge of the hinge. 



Plate XVII. Fig. 6c. 



Locality. Goose Creek. 



Museum, College of Charleston. 



The genus Pectunculus which had its maximum development in the seas of the actual 

 period, had its origin in the seas of the lower cretaceous period. 

 14 



