LIFE 



549 



skulls which exU'ndi-d bacKwards over the neck and shoulders in a 

 fapr-likc- llun^r (Fig. 461). Added to this was a sharp, parrot-like 

 l.rak, a >tout horn on the nose, and a pair of large pointed horns on 

 the top of the head. One of the larger skulls measures eight feet 

 from the snout to edge of the cape. This excessive provision for 

 (U-frnse was accompanied by a very small brain cavity. Marsh 

 n-marks that they had the largest heads and the smallest brains of 

 the reptile race. They were doubtless stupid and sluggish. The 

 ornithopod division was well represented (Fig. 463). Their hinder 

 parts were large, their limbs were hollow, and their footprints indi- 

 cate that they walked in kangaroo-like attitude. 



Fig. 463. A Cretaceous dinosaur of the ornithopod division, Claosaumx 

 anmrlcits. (Restored by Marsh.) 



Terrestrial turtle remains are found in the Dakota sandstone, and 

 the fossils of species inhabiting fresh waters in the late Cretaceous 

 deposits of Canada. Of true lizards, only one late Mesozoic form 

 is known, and that of small size and uncertain affinities, from the 

 Laramie. Snakes made their first appearance, so far as known, in 

 the later part of the period, but they were small. Crocodiles under- 



