NEW CARNIVOROUS THERAPSIDS. 173 



It certainly is a new species, and I have much pleasure in naming 

 it after my old friend, Mr. Brown. 



Only a very few of the sutures can be clearly made out, but so 

 far as can be seen the structure of the skull is very similar to 

 that of Trirachodon kannemeyeri Seeley. 



The following are the principal measurements of the skull : — 



Snout to front of orbit 27 mm. 



Antero-posterior diameter of orbit... 18 



Interorbital measurement 16 



Length of canine 4 



Height of canine 10 



Molar series (probably ) 1 8 



In Trirachodon kannemeyeri Seeley, the seven largest molars 

 meastire 21-22 mm. ; in T. minor Broom, they measure 18"5 mm. 

 in T. browni they measure 14 mm. 



The type skull is numbered R. 3307 in the B.M. Register. 



Proc. Zool. Soc— 1915, No. XIII. 13 



