VENERID^. 35 



This beautiful little shell was rare in the Post-Pleiocene period, and though living on 

 the coast of South-Carolina, is not abundant. 



Plate VI. Fig. 13, Right valve, natural size. 



Locality. Simmons'. Cabinet F. S. H. 



Genus, CHIONE. — Megerle Von Muhlfeldt. 



CHIONE CANCELLATA. 



Plate VI. Fig. 14. 



Venus cancellata, Linn., Syst. Nat., 12th Ed., p. 1130. 



Venus cancellata, Tuomey &; Holmes, Pleiocene Foss. So. Ca., p. 84, pi. 21, fig. 11. 



Chione cancellata, Adams, Gen. Recent Shells, Vol. 2, p. 421. 



Description. Shell thick, somewhat compressed, decussated, radiately .striate, concen- 

 trically sulcate; furrows remote, unequal, elevated ; anal side lamellar, cardinal teeth thick, 

 lunule cordate, buccal margin regularly rounded, anal margin sub-angulated ; pallial 

 margin crenulated. 



This shell is easily distinguished by the raised, concentric and remote lines of growth, 

 the radiating striae are alternately larger and smaller. It is an abundant species in the 

 Post-Pleiocene ; and from the number of dead shells found upon our sea-beaches, we infer 

 it is living on the coast. 



Plate VI. Fig. 14, Natural size. 



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



CHIONE CRIBRAR.IA. 

 Pl.we VI. Fig. 15. 



Venus cribraria, Co7i., Pro. Acad. Nat. Sci., Vol. 1, p. 310. 



Venus cribraria. Con., Foss. Ter. Form., p. 67, pi. 38, fig. 2. 



Venus cribraria, Tuomey S,- Holmes, Pleiocene Foss. So. Ca., p. 83, pi. 21, fig. 10. 



Description. Shell sub-trigonal, slightly ventricose; ribs twenty-five to thirty, con- 



