ICHTHYOSAURS 



and fore-arm or fore-leg and upper arm or 

 thigh. A great number of kinds of these 

 Plesiosaurs have been discovered, especially in 

 the Lias rocks of the South of England, slabs 

 containing whole skeletons being frequently- 

 obtained. They and the similarly embedded 

 and flattened skeletons of different kinds of 



FiG. 165. — Photograph of a skeleton of the large-paddled 

 Ichthyosaurus preserved in Liassic rock. 



Ichthyosauria may be seen in quantity on the 

 walls of the gallery of fossil reptiles in the 

 Natural History Museum. 



In Fig. 165 the flattened skeleton of an 

 Ichthyosaurus is photographed. This particular 

 species is remarkable for the great size of its 

 fore-paddles. 



225 Q 



