EXPLANATION OF I'LATE 11. 



Cymbospondylus petrimis Leidy. 



Anterior limb and arch, X % 

 From the Middle Triassic of West Ihnntioldt Ran^e. Nevada. 



ig. 1. No. 9154. CJ. rijjlit clavicle. 



Fi<r. 2. No. 9950. Left side: Sc, scapula ; Co, coracoid ; //, liuinerus: h'. radius; U, ulna ; 

 Cur, carpals. 



[178] 



