St. Maurice and CIvAiborne Pelecypoda* 



PLATE lO 



Figure Page 



i-io. Ostrea vicksburgensis var. ludoviciana, n. var 14 



About natural size ; showing form and markings of both 

 valves. Figs. 2 and 6 from Natchitoches, others from Chestnut, 

 Iva. 



11-15. Ostrea johnsoni Aldrich 15 



About natural size. 11-13, Caton's Eluff,Ala. 15, I^isbon, Ala. 



