32 POST-PLEIOCENE FOSSILS. 



This little species is distinguished by its sub-triangular outline, thick, robust and 

 coarsely crenulated ribs. The beaks are slightly turned forward. There are two teeth 

 in the left, and one in the right valve. The species is an inhabitant of the southern coast, 

 and common in the Post-Pleiocene of South-Carolina; we have never found larger speci- 

 mens. 



Plate VI. Fig. 8, Natural size. 



Locality. Simmons'; Wadmalaw. 



Museum, College of Charleston; Cabinet F. S. H. 



OAEDITA FLOKIDANA. 



Plate VII. Fig. 1. 



Cypricardia Floridana, Con., Foss. Ter. Form. U. S., p. 12. Observations on C. arata. 



Description. Shell ovately oblong; ribs fifteen, transversely radiated, rounded, 

 nodulous ; buccal side very short; anal truncated. 



This shell is living on the Florida coast, but has not jet been discovered on that of 

 Carolina, and only a single valve found in the Post-Pleiocene. 



I give an outline of natural size, and a magnified figure. 



Plate VII. Fig. 1. 



Locality. Simmons'. Cabinet F. S. H. 



ASTAETE LUNULATA. 

 Plate VI. Fig. 9. 



Astarte lunulata, Con., Foss. Ter. Form., p. 44, pi. 21, fig. 8. 

 Astarte lunulata, L. R. Gibbes, Tuomey's Geol. So. Ca., appendix, p. xxi. 

 Astarte lunulata, Tuorney fy Holmes, Pleiocene Foss. So. Ca., p. 72, pi. 20, fig. 4. 

 Astarte mactracea, Stimpson, Shells New-England, p. 18. 



Description. Shell small, flat, somewhat angular, concentrically furrowed ; buccal 

 margin truncated ; anal margin somewhat angular. 



