100 PLEIOCENE FO.SSILS. 



Description. Shell oblong-oval, straight, gaping at ends; buccal and anal margins 

 obtusely rounded; pallial margin straight, slightly compressed near the middle; beaks 

 nearly central, slightly elevated. 



In the Post Pleiocene beds of South-Carolina, this species is found in great numbers, 

 and is recent along the Southern coast. 



Plate XXIII. Fig. 12, Exterior of shell 



" 13, Interior of shell, natural size. 



Locality. Pee Dee; Waccamaw; Smith's, Goose Creek. 



Museum, College of Charleston. 



The genus Solecurtus commenced its existence in the seas of the Neocomien or early 

 Cretaceous period. 



PANOPCEA.— Say. 



The genus Panopcea commenced its existence in the seas of the Triassic period. 

 PANOPCEA REFLEX A. — Say. 

 Plate XXIV. Fig. 1. 



Panopcea refiexa, Say, Jour. Acad. Nat, Sci., Vol. 4, p. 153, pi. 13, fig. 4. 

 Panopcea refiexa, Con., Foss. Med. Ter. For., p. 5, pi. 3, fig. 4. 

 Mya refiexa, Lea, Jour. Acad. Nat. Sci., Vol. 4, p. 153, pi. 13, fig. 4. 



P. testa oblong o-subovali, corrugata; margine buccali late et obtuse rotundata; margine 

 anali refiexa, angustiori, et longiori. 



Description. Shell oblong-subovate, wrinkled; anal margin reflected, narrower and 

 longer than the buccal, which is widely and obtusely rounded. 



Plate XXIV. Fig. 1, Natural size. 



Locality. Pee Dee. . Museum, College of Charleston. 



