PLEIOCENE FOSSILS 103 



This is the most common of the three species of Pholadid^e on the Southern coast, and 

 is abundant in the harbors of this State. It often attains the width of six inches. Our 

 figure is taken from a small specimen. 



Plate XXIV. Fig. 4, Fossil, natural size. 



Locality. Waccamaw. 



Museum, College of Charleston. 



PHOLAS OBLONGATA. -Say. -i 



Plate XXIV. Fig. 5. 



Pholas oblongata, Say, Jour. Acad. Nat. Sci., Vol. 2, p. 320. 



P. oblongo-ovata, inflata, transverse et longitudinaliter striata; striis muricatis antice 

 elevatioribus; margine buccali acute rotundata; margine anali compressa; margine dorsali 

 antice reflexa, cavum conficiente; cardine callosa; minute bifariam striata, cellulis circiter 

 duodecim. 



Description. Shell oblong-ovate, inflated, transversely and longitudinally striated; 

 striae muricated, and elevated on the buccal side into ribs; buccal margin acutely rounded; 

 anal margin compressed; dorsal margin anteriorly feflexed, forming a cavity; hinge 

 callous, minutely striated transversely and longitudinally, and with about twelve cells. 



This shell is easily distinguished from P. costata by the hinge-cells. It is living on 

 the coast of South-Carolina, Georgia, and Florida, and is quite common. 



Plate XXIV. Fig. 5, Natural size. 



Locality. Waccamaw; Pee Dee; Sumter. 



Museum, College of Charleston. 



27 



