348 



ANIMALS OF THE PAST 



Tlie i-eiiiains of about fifty spcfies of sea reptiles have been 

 foiiiiLl. Some of tlieiu were thirty to forty feet long. 



Fig. 228. — Si 



t' iiiesdzuic time.s. 



Figure 227 gives a ^'ery good idea of the ap]iearance of one 

 species. j\iiother species shown in Figure 228 varied from 

 t\^•ent;y-fi^•e to thirty feet in length. 



-n^ui.i.vi 



