ARCADE. 17 



side short, rounded, inflated; anal side produced, beaked, somewhat recurved; lunule 

 lanceolate. 



This little species, which is also an inhabitant of our coast, occurs in the Meiocene of 

 Virginia, and in the Pleiocene and Post-Pleiooene of South-Carolina. It is easily distin- 

 guished by its rostrated anal side and regularly striated surface. — T. 4- H. 



Plate III. Fig. 7, Interiur of left valve, natural size. 



Locality. Stono; Simmons'. 



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



N U C U L A P K X I M A. 

 Plate III. Yio. 6. 



Nucula proxima, Saij, Jour. Acad. Nat. Sc!l., Vol. 2, p. 270. 



Nucula proxima, Con., Am. Marine Conch., p. 31, tab. 6, fig. 2. 



Nucula proxima, L. R. Gibbes, Tuomey's Geol. So. Ca., appendix, p. xxi. 



Nucula proxima, De Kay, Zool. New- York, Art. Mollusca, p. 179. 



Nucula proxima, Gould, Invert. Mass., p. 103, fig. 63. 



Nucula proxima. Tuomey S^ Holmes, Pleiocene Fossils of So. Ca., p. 53, pi." 17, figs. 7 to 9. 



Nucula proxima. Say's Conch. United States, (Binney,) p. 90. 



DESCRirTioN. Shell oblique, ovate-triangular, anterior side perpendicular to the base ; 

 crossed by minute, concentric, and radiating lines ; within pearly ; margin crenulated ; 

 teeth twelve before and eighteen behind the beaks. — Gould. 



The very short buccal side, and pearly interior, are quite characteristic of this .shell. 

 It belongs to the actual fauna of the coast, and is found fossil in the Meiocene of Virginia, 

 Pleiocene and Post-Pleiocene of South-Carolina. 



Plate III. Fig. 6. 



Locality. Simmons'. Museum, College of Charleston; Cabinet F. S. H. 



