78 POST-PLEIOCENE FOSSILS. 



PORCELLANA— Adams. (1757.) 

 MARGINELLA.^Lam. (1801.) 



PORCELLANA LIMATULA. — Con. 

 Plate XIL Fig. 12. 



Marginella limatula, Con., Jour. Acad. Nat. Sci., Vol. 7, p. 140. 



Marginella limatula, d'Orhigny, Prodrome de Paleontologie, Vol. 3, p. 51. 



Porcellana limatula, Con., Proc. Acad. Nat. Sci., Vol. 7, p. 31. 



Porcellana limatula, Tuomey Sf Holmes, Pleiocene Foss. So. Ca., p. 130, pi. xxvii, figs. 10, 11. 



Description. Shell ovate, polished; spire very short; labrum denticulated on the inner 

 maro-in; margin swelling in the centre; aperture contracted above; columellar vs^ith four 

 oblique elevated plaits. — T. Sf H. 



This is a common shell in the Post-Pleiocene beds of South-Carolina ; it differs from 

 the Pleiocene forms in having a more elevated spire; the columellar has sometimes but 

 three plaits, though four is not uncommon. 



Plate XII. Fig. 12, Natural size. 



Locality. Simmons' ; John's Island. 



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



VOLVARIA.— Lam. 



VOLVARIA CANALICULATA. — Say. 

 Plate XIL Figs. 11, 11a. 



Volvaria canaliculata. Say, Jour. Acad. Nat. Sci., Vol. 5, p. 211. 



Volvaria canaliculata. Say, Conch. U. S., ed. Binney, p. 121. 



Bullina canaliculata. Say, Amn. Conch., pi. 39. 



Bullina canaliculata. Say, Conch. U. S., ed. Binney, p. 193. 



Volvaria canaliculata, Ravenel, Cat. Coll. Shells, p. 18. 



Bulla canaliculata, Gould, Invert. Mass., p. 166, fig. 97. 



Bulla obstricta, Gould, Invert. Mass., p. 167, fig. 96. 



Bulla canaliculata, De Kay, Zool. Nevi^-York, Art. Mollusca, p. 19, pi. xxv, fig. 328. 



