PELis 459 



extremity of nasals the convexity ot" the dorsal profile is more 

 gradual and regular to slightly overhanging lambdal region ; 

 occiput obliquely truncate but not noticeably concave, the 

 condyles not visible when skull is viewed from above ; ventral 

 profile flat throughout. Brain-case broadly ovate or nearly 

 globular when viewed from above, the posterior outline distorted 

 in oldei- specimens by the projecting lambdoid border, the 

 greatest width above zygomata slightly greater than depth at 



Fig. 96. 

 Feb's ^ili'estris. x 



middle, and about equal to distance from posterior border of 

 parietal to deepest portion of postorbital constriction ; sagittal 

 crest low, appearing first on interparietal, the only region where 

 it becomes a true crest, the muscular ridges in front of 

 interparietal at first separate and forming a lyre-like figure, but 

 later uniting in continuation of the median crest. Floor of 

 brain-case flat, without noticeable surface features ; auditory 

 bulhu large, highly inflated, longer than broad, formed mostly by 



