PLEIOCENE FOSSILS. 69 



OAEDITA ABBREVIATA. 

 Plate XIX. Fig. 12. 



Cardita abbreviata, Con., Am. Jour. Sci., Vol. 41, pi. 2, fig. 17. 

 Astarte abbreviata, Con., Foss. Ter. For., p. 77, pi. 43, fig. 12. 



C. testa parva, ovato-trigona, obliqua, conveza, radiatim costata; costis crenatis, umbonibus 

 acutis. 



Description. Shell small, ovately triangular, oblique, radiately ribbed ; ribs crenate, 

 umbones acute. 



Resembles the young of C. granttlata, but is much more elevated, has the ribs more 

 closely arranged, and in outline is more oblique than in C. granulata, Say. 



We have restored this and the preceding species to the genus Cardita, under which 

 they were first described by Conrad. We are not aware that any radiately ribbed species 

 belong to the genus Astarte, and moreover, the additional buccal muscular impression is 

 wanting in these species. 



Plate XIX. Fig. 12, Natural size. 



Locality. Waccamaw. 



Museum, College of Charleston. 



