2390 CROCODILES, DINOSAURS, AND FLYING DRAGONS 



feet. On the other hand, some species were comparatively small, and not more than 

 a couple of feet in length. Although the whole of these reptiles are markedly dis- 

 tinct from the crocodiles, yet they agree with them in the general characteristics of 

 their skulls, vertebrae, and ribs; but they differ so decidedly from one another that 

 it is not easy to give a definition of the entire order. They are, indeed, divided 

 into three well-marked groups, with so many differences between them that in the 



RESTORATION OF THE IGUANODON. 



opinion of many they are entitled to rank as separate orders; and it will, accord- 

 ingly, be most convenient to treat these three groups seriatim. 



The most stupendous members of the order are included in a group 

 Lizard- Footed , . , 



Group which may be conveniently designated lizard- footed dinosaurs, on ac- 

 count of their walking in the ordinary lizard-like manner, and in hav- 

 ing five toes to the feet. The most striking peculiarity of this group is to be found 



