ao7 ^T. Maurice and Claiborne Pelecypoda 207 



PLATE 6 

 Figure Page 



I. Ostrea alabaviicnsis Lea X i 9 



Young, showing radii and beginnings of plications. Claiborne, 

 Ala. 



2-\z. O. sellcefori7iis Conrad, X i 



Young, showing both valves and various stages of posterior 

 flexure. Base of bluff at Claiborne, St. Maurice stage. 

 5. Represents a young specimen with concentric growth-lines 

 well developed in comparison with the strength of the radii, 

 var. Icsta de Greg., p. 201. 



