206 



THE WORLD OF LIFE 



or shallow seas, were preyed upon by the numerous 

 crocodiles which lived throughout the same periods and 



FIG. 58. SKULL OF SAUROPODOUS DINOSAUR (Diplodocus). 



From the Upper Jurassic of Colorado, U.S.A. One-sixth nat. size. 



(B.M. Guide.) 



are everywhere found in the same strata. They were of 

 varied forms and sizes, but as they did not differ much 



FIG. 59. SKULL OF A THEROPODOUS DINOSAUR (Ceratosaurus nasicornis). 

 From the Upper Jurassic of Colorado, U.S.A. One-sixth nat. size. 

 (B.M. Guide.) 



