IN* XmC CAKN'IVOKOTJS DINOCEPIIALIAN IlErTILES. 



683 



and a small prearticular. The apparent resemblance is, in my 

 opinion, tine to the fact that each is bnt a modification of the 

 early reptilian type. 



I give two sections of the jaw of a Dicynndon i\w(\ one of a 

 young Gorgonopsian for comparison with the sections of the jaw 

 of Titan oauchns. The first two show how essentiallj' similar 

 TitanosKchus is to Dicynodon. The third shows how the angular 

 in the Gorgonopsian is split in a somewhat similar manner to 

 that seen in Titanosiichus, 



Text-fignre 16. 



■KKMr^^J^^iil^'^j^^ 



A. IJiglit inaiulil)le of the Gorgonojisian JEhiroijnafhus tir/viceps (Broom & 



Ilonghton). 

 15. Posterior two-thirds of right mandible of the V\c%\osti.vi\- Feloncustus pMlnvchvs 



(Secley), showin"; the prearticular. 



It is perhaps too early yet to definitely state the lines of 

 evolution of the Therapsids, but Ave are perhaps not far from the 

 trutii if we suggest th.at the Titanosucliians, the Anomodonts, 

 and the Gorgonopsians have all sprung from a common ancestor 

 which was what might be regarded as a pre-Gorgonopsian. 



I hope shortly to give a. full account of the Gorgonopsian 

 skeleton, and I will discuss at greater length the probable 

 affinities of the groups. 



ENOiMUS* STRUBENi, gen. et sp. nov. 



This new genus and species are founded on a specimen con- 

 sisting of the two dentaries of a large 'i'itanosuchian reptile, 

 quite diflerent from any previously known. The snout of the 

 animal must have been very short and broad and bhint. In each 

 dentary there are the remains of four large incisors, and though 

 the crowns are lost, there is little doubt that they have been of 

 the typical Dinocephalian structure. The four occupy a space 

 of 80 mm. About 7 mm. behind the fourth incisor is a very 



* From ai'j'o /3tas — fearfullj- strong. 



