470 NORTH AMERICAN INDEX FOSSILS. 



Fig. 625. a-c, Gryphcea washitaensis ; d, e, G. navia. (After Hill and Vaughan.) 



Abundant in the upper Washita (Denison and Buda) of Texas, 

 and in Sonora. 

 291. G. vesicularis Lamarck. (Fig. 627.) Comanchic-Cretacic. 



Fig. 626. Gryphcea miuronata. (After Hill. ) 



