88 PLEIOCENE FOSSILS. 



and the lamellar character of the ribs, but the form of the hinge as well as the widely 

 gaping posterior extremity of Pholas separate the two genera. 



The shell is ovate-cylindrical, equivalve, but very unequilateral ; the buccal side is 

 rounded, and covered with irregular lamellar and somewhat toothed ribs; anal side covered 

 with radiating irregular raised lines. The lunule is defined by the termination of the 

 lines of growth. 



Petricola pholadiformis is common on the sea coast of this State. 



Plate XXI. Fig. 5. 



Locality. Pee Dee; and Smith's Goose Creek. 



Museum, College of Charleston. 



TELLINA.— Linn. 



TELLINA BIPLICATA. — Con. 

 Plate XXII. Figs. 3 and 3a. 



Tellina biplicata, Con., Foss. Ter. For, p. 36, pi. 19, fig. 4. 

 Tellina biplicata, Con., Jour. Ac. Nat. Sci., Vol. 7, p. 152. 

 Tellina biplicata, d' Orb., Prod, de Paleontologie, Vol. 3, p. 103, No. 1914. 



T. testa subovali, inequivalvi, sub-ventricosa, lineis radiantibus inconspicuis, striis tenuissi- 

 mis, prominentibus precipue in Uteris posterioris plicis; plicis duabus angularibus, una valvis 

 singulis distributa; rnargine car dinali prof unde sulcata. 



Description. Shell suboval, inequivalve, slightly ventricose with obscure radiatino- 

 lines, and prominent filiform strife, much elevated over the folds of the posterior side ; folds 

 two, one on each valve, angular; hinge margin profoundly sulcated posteriorly. 



Plate XXII. Fig. 3, Exterior of right valve, natural size. 

 " 3a, End view of fossil, to show hinge. 



Locality. Pee Dee. 



Museum, College of Charleston. 



