222 



THE WORLD OF LIFE 



Avitli tliolr wicle-openlng jaws evidently adapted them to seize 

 and prey ujDon the larger land-reptiles. These form the Sub- 



FiG. 58. — Skull of Sauropodous Dinosaur {Diplodocus) . 

 From the Upper Jurassic of Colorado, U.S.A. One-sixth nat. size. (B.M. Guide.) 



Fig. 59. — Skull of a Theropodous Dinosaur {Ceratosaurus nasicornis). 

 From the Upper .Jurassic of Colorado, U.S.A. One sixth nat. size. (B.:\r. Guide.) 



order Theropoda, or beast-footed Dinosaurs. The skull of one 

 of these here shown (Fig. 59) is more than 2 feet long, but 



