88 



AMERICAN PERMIAN VERTEBRATES 



structure here. The drawings here given are in part a composite 

 of the three specimens, all of which quite agree in size. For 

 comparison I also give an outline sketch figure of the skull of 

 Varanosaurus acutirostris, copied from the original by Broili. 



FIG. 26. Varanosaurus brevirostris 

 Williston. Skull, from above, two-thirds 

 natural size. 



FIG. 27. Varanosaurus acutrirostris 

 Broili. Skull, from above, two-thirds 

 natural size. After Broili. 



The upper surface of the skull between and immediately in 

 front of the orbits is gently concave. At the upper anterior angle 

 of the orbit there is an elevated protuberance, which extends 



