13 



St. Maurice and Claiborne Pelecypoda 



posterior emargination and convexity of both valves which, by 

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

 thin, nearl)^ fiat, multicostate, less aviculoid, less emarginate and 

 earl}^ kinked young and adolescent individuals of sellc?forviis. 



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

 pi. 29, fig. 2, 1885, a cast of an 03'ster from the Shark River Eo- 

 cene beds of New Jerse}^ under the name of O. glaicconoides, 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 Jersey and Claibornian specimens should be re- 

 ferred to the species. The former evidentl}' had a much thinner 

 shell and was inflated near the beak. 



Type. — Paleont. Mus. Cornell Univ. 



Hoiizo7i. — St. Maurice Eocene. 



Specimens figured. — Chestnut, La.; 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 Phrish, and 

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



Fig I. Ostrea var. perpHcata Dall 

 Variety perplicata Dali 



Dall in his Florida Fossils as published in the Transactions 

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



