CLASSIFICATION OF THE THERIOUUNTIA. 



61 



the median suture is clearly sliowu from the front of the pineal 

 foramen to a point between the frontals, and the well-marked 

 suture between the frontal and parietal j^asses very little in 

 advance of the pineal opening. These sutures are, however, 

 exposed at a plane below the orginal dorsal surface, and there is 

 a remote possibility which cannot, although very improbable, be 

 entirely excluded, that the preparietal was represented by a 



Text-fic-ure 18. 



Par. Qu. 



Arcfognathnsjiurvimola Owen. Tj'pe-skull. 



Kcstoratioii of tlic dorsal aspect, the parts in broken lines being hypotlietically 



restored. 



minute scale of bone lying on the dorsal surface. The parietal 

 region is about as wide as the interorbital. 



The maxilla is short and deep, its tooth-bearing margin is 

 much curved and passes smoothly with no trace of a step into 

 that of the premaxilla. The canines ajDpear not to be completely 

 erupted, and the four small cheek-teeth are also not very firmly 



