SMROI'lERYGIA 



83 



however, was not flat like the under shell of a turtle, but rounded 

 from side to side. 



Fig. 36. — Pelvic girdle from above of Truiacromcni»i oshonii. an Upper Cretaceous 

 plesiosaur: />, pubis; is, ischium; //, ilium. 



Many of the characteristics of the limbs of the plcsiosaurs are 

 peculiar to themselves; others they had in common with other 



