348 



ANIMALS OF THE PAST 



The remains of about fifty species of sea reptiles have been 

 found. Some of them were thirty to forty feet long. 



Fig. 228. — Sea reptile of mesozoic times. 



Figure 227 gives a very good idea of the appearance of one 

 species. Another species shown in Figure 228 varied from 

 twenty-five to thirty feet in length. 



Fig. 229. — Land reptile of mesozoic times. 



