60 PLEIOCENE FOSSILS. 



LUCINA COSTATA.- {New Species.) 

 Plate XVIII. Figs. 12 and 13. 



L. testa orbiculata, crassa, compressa, radiatim costata, concentrice striata, sub-suhata; 

 latere anali squamoso. 



Description; Shell orbicular, thick, compressed, radiately ribbed, concentrically 

 striate, and towards the pallial margin somewhat sulcate. 



This fossil is readily distinguished from the small LUciximE which it resembles, by the 

 prominent rounded ribs. 



It occurs in great abundance in the Post Pleiocene beds near Charleston, although it 

 has not as yet been found amongst the living fauna of the State. 



Plate XVIII. Fig. 12, Natural size. 

 " 13, Magnified. 



Locality. Black Paver. 



Museum, College of Charleston. 



LUCINA C E E N D L A TA.-Cox. 



Plate XVIII. Figs. 14 and 15. 



Lucina crenulata, Con., Foss. Ter. For., p. 39, pi. 20, fig. 2. 



L. testa rotundata, injlata, concentrice lamellata; latere anali sub-jlexuoso ; lunula sub- 

 excavata. 



Description. Shell orbicular, inflated, concentrically lamellated, lunule slightly 

 excavated. 



This little species is readily distinguished by its orbicular outline and the closely 

 arranged concentric lamella; ; the lunule is short and deep. 



