13 



St. Maurice and Claiborne Pelecypoda 



13 



posterior emargiuation and convexity of both vab/es which, b)- 

 the way, are of a thick, dense make-up, distinguish it from the 

 thin, nearly fiat, multicostate, less aviculoid, less emarginate and 

 early kinked }-oung and adolescent individuals of sellceforniis. 



Whitfield described in U. S. Geol. Surv. Mon. IX, p. 222, 

 pi. 29, fig. 2, 1885, a cast of an oyster from the Shark River Eo- 

 cene beds of New Jersey under the name of O. glauconoides, and 

 referred specimens from the base of the bluff at Claiborne to this 

 species. But, even with the New Jersey type in hand (kindl)- 

 loaned b}' State Geologist Kiimmel) it is impossible to state 

 whether the New Jerse}' and Claibornian specimens should be re- 

 ferred to the species. The former evidently had a much thinner 

 shell and was inflated near the beak. 



Type. — Paleont. Mus. Cornell Univ. 



Hoiizon. — St. Maurice Eocene. 



Specimens figured. — Chestnut, Ea.; Harris Collection, now 

 deposited at Cornell. 



Localities. — Collier's Ferry, Burleson Co., likewise from Bra- 

 zos, Robertson, Cherokee Co's., Tex. ; Natchitoches, Marble 

 Q'y, Chestnut, 35 mis S. E. of Creston, in Bienville Phri.sh, and 

 at Chautauqua, Ea ; Lisbon and Hamilton Bluff, Ala. 



Fig I. Ostrea var. perplicata Dall 

 Variety perplicata Dall 



Dall in his Florida Fo.s.sils as published in the Transactions 

 of the Wagner Free Institute of Science, vol. 3, p. 678, names a 



