213 St. Maurick and Claiborne Pelrcvpoda 213 



PI.ATE 12 

 Fii^re Page 



I, 2. Anoniia navicelloides var. hanimetti Har., 20 x 14 tnm 18 



Exterior and interior of upper valve ; Hammett's Branch, La. 



3-8. Plicatnla filamentosa Con., X 2 18 



Claiborne sands, Claiborne, Ala. 



9-12. P.fil. var. coticentrica Dall, X .2 19 



Columbus, Tex, 



13-16- P. fil. yar. plavata AXA., X2 19 



Wautubbee, Miss. 

 17. The same, enlarged about 4 times ; Hickory Miss. 



