OF A FORMER WORLD. 



35 



CHAPTER IV. 



Mighty Pre- Adamites who walk'd the earth, 

 Of which ours is the wreck." 



HYLJEOSARUS (Weald Lizard). The lizard thus denom- 

 inated by the discoverer, Dr. Mantell, was about twenty-jive 

 feet in length, and is chiefly remarkable by a large spiny 

 process along the back, which must have given to such a 

 creature a terrific appearance. Such process is found in 

 many of the living lizards. 



Iguanodon (fig. 6). The remains of this, the most gi- 

 gantic of all reptiles living or extinct, were also made 

 known to the world by Dr. Mantell. The bones obtained 

 by the doctor indicate the existence of a herbivorous lizard, 



Fig. 6. 



The Iguanodon. 



