346 HISTORICAL GEOLOGY. 



Keptiles. The extraordinary number of dinosaurian 

 reptiles found here have thrown much light on this order. 

 Some of them were reptile-footed (Sauropoda) (Fig. 299), 

 some bird-footed (Ornithopoda) (Fig. 300), some beast- 



FIG. 300. Laosaurus, x 5^. (Restored by Marsh.) 



FIG. 301. Stegosaurus ungulatus, x Jts. (Restored by Marsh.) 



