NERVOUS SYSTEM. VERTEBRATA. 



185 



B of the Kangaroo were spoken of (supra) as representing 

 the so-called " Sylvian fissure " of the Oarnivora.] 



Behind the sulcus A there is a short deep sulcus B pro- 

 ceeding obliquely upward and backward from a triangular 

 depression at the bend of the rhinal fissure. 



Fig. 60. (Nat. size.) 



SULC. SUPRAS 



SULC.P. LAT. 



Above the sulcus A there is a long oblique suprasylvian 

 sulcus (figs. 60 & 61). As this sulcus is directed upward 

 and backward, it resembles the typical suprasylvian sulcus 



Fig. 61. (Nat. size.) 



.SULC. LAT. 



SULC.SUFRAS. 



SULO. P. LAT. 



(e. g. in the Carnivora) much more closely than that of the 

 smaller Macropods (e.g. Parry's Wallaby, fig. 59), the 

 obliquity of which is upward and forward *. 



* This difference may possibly be associated with the pronounced dwindling 

 of the anterior regions of the hemisphere in the Macropodidae. 



