42 POST-PLEIOCENE FOSSILS. 



Genus, MULINIA. 



MULINIA MILESII. — (New Species.) 

 Plate VII. Fig. 11. 



Description. Shell, oblong-oval, transverse, thin; buccal side produced, sub-angulated, 

 round at point ; anal side regularly rounded, somewhat tumid ; base emarginated, com- 

 'pressed, compression extending upwards towards umbones ; anterior dorsal margin 

 sub-rectilinear ; beaks hardly prominent ; V tooth strong, recipient cavity for lateral teeth, 

 long, simple ; cartilage-pit sub-angular. 



This species cannot be confounded with any other shell from the Post-Pleiocene or 

 coast of South-Carolina; its distinct V tooth, elongated anterior side, compressed pallial 

 margin, round and tumid anal side, readily characterise it. The left valve only has 

 yet been discovered. I take pleasure in dedicating it to my friend the adjunct Professor of 

 Anatomy in the Medical College of Charleston, Dr. Francis T. Miles. 



Plate VII. Fig. 11, Natural size. 



Cabinet F. S. H. 



Genus, RAETA. — Gray. 



RAETA LINEATA. 

 Plate VII. Fig. 12. 



Lutraria lineata, Say, Jour. Acad. Nat. Sci., Vol. 2, p. 310. 



Lutraria lineata, Am. Conch., pi. 9. 



Lutraria lineata, Con., Am. Marine Conch., p. 47. 



Lutraria lineata, Ravenel, Cat. Recent Shells, p. 2. 



Lutraria lineata, Be Kay, Zool. New-York, Art. Mollusca, p. 232. 



Lutraria lineata, L. R. Gibbes, Tuomey's Geol. So. Ca., appendix, p. xxii. 



Lutraria papyracea, Lamk., An. sans Vert., Vol. 6, p. 93. 



Lutraria papyratia, Con., Am. Conch., pi. 10. 



Raeta papyracea, Con., M.S.S. 



Raeta papyracea, Adams, Gen. Mollusca, Vol. 2, p. 386. 



Lutraria lineata. Say's Conch. U. S. (Binney), p. 158. 



Description. Shell transversely sub-oval, thin, whitish, tinged with ferruginous; 

 posterior hiatus patulous ; anterior hiatus linear and commencing below the hinge slope ; 



