AN EXTINCT CARNIVOKE. 427 



disposition of the basicranial foramina, the ending of the palate 

 posteriorly between the last molai-s, the position of the infra- 

 orbital foramen on the cheek, and the absence of a postorbital 

 prominence. It differs only in its steeper frontal profile and 

 certain minor characters. The inner face of the stout mastoid 

 process, for example, is irregularly ridged, not smooth as in 

 yEhtropus. The foramen which pierces the inner wall of the 

 lachrymal pit in the existing species, is behind this pit in the 

 fossil. 



The molar and premolar teeth, so far as preserved, agree closely 

 with those of JEluropus, and exhibit only a less marked crimping 

 and less tendency to subdivision of some of the cusps. Except 

 these features, there is nothing to remark about the molars (PI. I. 

 figs. 1 A-c, m. 1, m. 2). The upper sectorial (/)??i. 4) is noteworthy 

 for the simple and robust character of its antero-internal cusp or 

 protocone. The third premolar (p7?i. 3) is preserved only on the 

 left side and agrees precisely with that of JiJluropios, but is rela- 

 tively a little larger. Even in the existing genus the space for 

 the first two premolars is so short that the double-rooted pm. 2 is 

 thrust crosswise and pm. 1 is reduced to a single minute cusp 

 (PI. I. fig. 2) ; but in the imperfect fossil, which does not retain 

 either of these teeth, the corresponding space is still shorter. 

 The bone is broken away on the right ; but it seems to be suffi- 

 ciently well preserved on the left to show that only one single- 

 rooted premolar originally occupied this position. At least, a 

 single socket of moderate size fills the whole of the space between 

 pm. 3 and the canine. The canine (c), broken on the left, but 

 completely preserved on the right side, closely resembles that of 

 jEluropus, even to the faint crimping of its posterior keel ; it is, 

 however, slightly more robust than in the described specimens of 

 the existing species. 



Some of the principal measurements of the fossil, in fractions 

 of a metre, are as follows : — 



M. 



Length from anterior border of nasals to posterior face of occipital cond3'les. 0"25 



Maximum width between outer borders of mastoid processes, about 0*18 



Maximum width of basioccipital between tympanic bullse 0'043 



Frontal width at postorbital point 0"066 



Depth of snout from alveolar border above pm. 3 , about 0'075 



Depth between alveolar border and beginning of sagittal crest, about 0'135 



M. 2— maximum length 0-038 



width 0-029 



M.l— „ length 0-027 



„ width 0-031 



Pm.4^- „ length 0-029 



width 0-021 



Pm.3— „ length 0-023 



„ width 0-014 



Canine — „ length of base 0-023 



width of base 0-016 



The fossil from Mogok, therefore, differs essentially from the 

 skvill of the existing species of yEluro2nos in the shortness and 

 bluntness of the snout, with the consequent reduction of space 



Proc. Zool. Soc— 1915, No. XXX. 30 



