236 BUI^LETIN 31 236 



PLATE 35 



Figure Page 



1-5. Crassatellites protextus Conr&d, Claiborne lor 



Fig. I, 45 mm., showing umbonal markings, lunule, &c. 



2, 48 " right valve ; 2, a, left. 



3, 40 " broad form. 



4, 18 " young, showing concentric ribbing and sinu- 

 osity. 



5, 40 mm., typical. 



6. Crassaie/Mfs a/ius Conrad, Claiborne sand 104 



Right valve 82 ; left, 97 mm. 



