112 PLEIOCENE FOSSILS. 



By some this is considered only a variety of C. fornicata; like this species it is common 

 in the Pleiocene, and also in the recent state upon the sea-shores of South Carolina. 



Plate XXV. Fig. 12, Exterior of shell, natural size. 



Locality. Pee Dee. Museum, College of Charleston. 



CRYPTA COSTATA. 

 Plate XXV. Fig. 11. 



Crepidula costata, Morton, Jour. Acad. Nat Sci., Vol. 6, p. 115, pi. 7, figs. 2 and 3. 



C. testa crassa, ovali, perconvexa; dorso costis numerosis, elevatis, longitudinalibus obtecto; 

 latere sinistro planulato; margine piano. 



Description. Shell oval, thick, very convex, with numerous longitudinal elevated 

 costse; beaked side flattened; margin plain. — S. G. Morton. 



Dr. Morton described this shell as above, from a specimen found in the "upper Marine 

 formation of Maryland," and it corresponds with our Carolina shell. 



Plate XXV. Fig. II. 



Locality. Darlington. Museum, College of Charleston. 



HIPPONIX.— Defrance. 



HIPPONIX BULLII.- {New Species.) 

 Plate XXV. Fig. 13. 



H. testa tenui, obliquo-conica, carinata; apice sub-acuto; lineis. irregularibus; apertura 

 sub-ovali a tergo angulata; margine tenui. 



