On Some New Thcrocephalian IleptUcs. 365 



both teeth have much of their crests missing, but the anterior appears 

 to have been complete when the animal died. It is a very large 

 tooth, the root alone measuring 55 mm., and the antero-posterior 

 length at the base must have been at least 20 mm. The posterior 

 canine is not yet fully grown, but is nevertheless a large functional 

 tooth. Behind the second canine are 4 small molars. Together they 

 measure 26 mm. They are serrated at least on the point. 



The nasals appear to be very like those of better known Thero- 

 cephalians. The frontals, prefrontals, and lachrymals are very 

 badly preserved. There is clear evidence of both postorbitals and 

 postfrontals, as in Scylacosaunis, but there is no preparietal. 



The parietals are united, and have an interdigitating suture a 

 little in front of the parietal foramen with the frontals, the post- 

 frontals and the postorbitals. Posteriorly the parietal meets the 

 supraoccipital (or possibly it is the interparietal) in the middle line 

 and laterally the squamosals. 



The jugal is fairly well preserved on both sides. It has an 

 ascending postorbital process which lies behind the postorbital bone, 

 and a posterior process which lies under the squamosal and forms 

 with it the temporal arch. 



The squamosal is remarkable for the large size of the outer 

 portion, which passes forwards and downwards as a fan-shaped 

 expansion. It overlaps the jugal in front and supports the rather 

 small quadrate. 



A section through the postorbital region shows that the pterygoid 

 has a number of moderate-sized rounded teeth. 



The mandibles are fairly well preserved. The dentary, as in 

 other Therocephalians, has a large coronoid process. The dentition 

 is not shown except in a transverse fracture. There is at least 1 

 large canine which lies in front of the anterior canine of the upper 

 jaw. An immature canine, not yet through the gum, lies to the 

 inside of the canine of the left side. There is no evidence of a 

 2nd canine, but there are 5 small molars, the anterior 2 or 3 

 of which lie in the region corresponding to the 2nd canine. The 

 angular is a large fiat oval-shaped bone, which forms the greater 

 part of the outer side of the posterior half of the jaw. On the 

 right side it is almost perfectly preserved. Internal to it and forming 

 the upper margin of the back part of the jaw is the large surangular. 

 Behind the surangular is the small articular. 



Portions of some cervical vertebrae are preserved. They are very 

 deeply biconcave, and possibly notochordal. There is a large inter- 

 centrum present between the axis and the 3rd cervical, and another 



