110 PLEIOCENE FOSSILS. 



Description. Shell ovate, tumid,, smooth, or with transverse wrinkles; apex medial, 

 minutely spiral, prominent, acute. 



Found also in the Meiocene of Maryland, and is now living upon the coast of this 

 State. 



Plate XXV. Figs. 8, Exterior and interior of shell, natural size. 



Locality. Pee Dee. Museum, College of Charleston. 



CRYPTA.— Humph. (1797.) 



CREPIDUL A.— Lam. (18 1.) 



CRYPTA FORXICATA. 



Plate XXV. Fio. 9. 



Crepidula fornicata, Lam., An. sans Vert. Vol. 7, p. 641. 

 Crepidula fornicata, Martini, 1, pi. 13, figs. 129, 130. 

 Crepidula fornicata, Say, Jour. Acad. Nat. Sci., Vol. 2, p. 225. 

 Crepidula fornicata, Con., Foss. Med. Ter. Form., pi. 45, fig. 10. 



C. testa obliquo-ovali, convexi, Icevi, inter dum corrugata obliteratis undatim longitudi- 

 nalibus lineis; apice prominenti versus latus contorto, margine annexo; septo subconcavo, 

 margine soluto undanto. 



Description. Shell oblique-oval, convex, smooth, sometimes wrinkled with obsolete 

 undulating longitudinal lines ; apex prominent, turned to one side and united with the 

 margin; diaphragm sub-concave, occupying half the interior of shell, the free edge waving. 



This is a common species in the Pleiocene beds of South-Carolina, and abundant on 

 the sea-shores in a living state. In the marl of Goose Creek a series of united casts occu- 

 pying their natural position, are common fossils. 



Plate XXV. Fig. 9, Exterior of fossil, natural size. 



Locality. Pee Dee. ' Museum, College of Charleston. 



