if ' 



o Q □ a ta ca C3 a a CSlCSi 

 .= racscsi ra C3 O C3 Cr3K)' 



ocJooc3ix)t3)cacx}e 



Figure 34. Left pectoral limbs of some aquatic reptiles: {a) leatherback turtle 

 (Dermachelys) ; (b) Geosaurus ; (c) Clidastes (a moasaur) ; {d) Op- 

 thalmosaurus (an ichthyosaur) ; and {e) Elasfnosaurus (a plesiosaur). The 

 last four are redrawn from Williston. 



[211] 



