TOOTH OF THE IGUANODON. 317 



other herbivorous reptiles chip off and swallow 

 their food whole, the construction of their jaws 

 not admitting of a grinding motion.* From this 

 condition of the crown, as shown in the tooth 

 figured below, it is obvious that the Iguanodon 

 fed on vegetables, and masticated its food like the 



is**'' 



LIGN. 2(. TOOTH OF AN IGUANODOK. 



From the Weaklen, Brook Bay. 



horse and other herbivorous mammalia : while 

 the base shows the imprint of the successional 

 tooth, which, by its pressure, occasioned the 

 absorption of the fang of the old one. In the 

 perfect tooth, the crown is of a prismatic form, 



* For an account of the development of the teeth of the Iguanodon, see 

 " Fossils of Tilgate Forest," p. "2; and " Wonders of Geology," p. 390. 



T 2 



