PLEIOOBNE FOSSILS. 89 



TELLINA ALTERNATA. — Say. 



• Plate XXII. Fig. 4. 



Tellina alternata, Say, Jour. Ac, Nat. Sci., Vol. 2, p. 275. i %fU 



T. testa compressa, oblonga, antice angustiore et angulata; lineis numerosis parallels, 

 equalibus, equidistantibus, impressis, concentricis, ad marginem anterior em alternatim obsole- 

 tis; areis inter stitialibus planis. 



Description. Shell compressed, oblong, narrowed and angulated before; numerous 

 parallel, equal, equidistant, impressed concentric lines, which on the anterior margin are 

 alternately obsolete ; interstitial spaces flat. 



A callous line which is sometimes obsolete, passes from behind the hinge to the inner 

 margin of the posterior cicatrix, and another from before the hinge to the inner margin of 

 the anterior cicatrix. Anterior hinge-slope declining in a somewhat concave line to an 

 obliquely truncated tip. 



This is a common species, living on the coast of South Carolina and Georgia, and not 

 unfrequent on the beach of Florida. 



Plate XXII. Fig. 4, Natural size. 



Locality. Waccamaw; Smith's, Goose Creek. 



Museum, College of Charleston. 



TELLINA LUSORIA. — Con. 

 Plate XXII. Fig. 5. 



Tellina lusoria, Con., Foss. Ter. For., p. 35, pi. 19, fig. 3. 

 Psammobia lusoria, Say, Jour. Ac, Nat. Sci., Vol. 5, p. 316, 



T. testa elliptica, parte posteriore plicata et reflexa; margine dor soli posterior e recta, obli- 

 qua; umbonibus extremitati posteriori truncate approximatis; margine basali arcuata. 



