1178 



MR. R. I. POCOCK ON THE EXTERNAL CHARACTERS 



auditory orifice opens approximately on a level with the inter- 

 tragal notch ; the tragus and antitragus, especially the latter, 

 are, on the whole, less well developed, and the summit of the ear 

 does not project so high above the level of the head, although 

 in Ratiofa and Fionambidus it is in this respect intermediate 

 between the ears of >Scm7-us vulgaris and its allies and those of 

 Callosciurus ajid Funisciurus. 



In Ratufa (text-fig. 42, C) the ear rises from the head at a point 

 about on a level with the anterior end of the supratragus in front 

 and below the upper end of the antitragal thickening behind ; its 

 upper edge is rounded, not pointed, and the edge of the anterior 

 margin is overfolded from the summit. Inferiorly the over- 



Text-fiffure 42. 



E 



A. '&9V 0^ Sciiirus vulgaris. D. ^^v of T^U7iarahulus palmarum. 



B. „ „ ISutamias quadrivittaius. E. „ „ JSoglauconiysfimbriatus. 



C. ,, ,, Hatufa indica. V. „ „ Glaucomi/s volans. 



o., position of orifice. 

 (These figures are intentionally drawn of approximately the same size.) 



folded edge is continued downwards and backwards into the 

 cavity of the ear, ceasing near its middle. Beneath its termi- 

 nation there is a shallow pit concealed within the antitragal 

 thickening, which is low and not produced. There is no tragus, 

 and the auditory orifice is just exposed within the intertragal 

 notch. In Calloscvarus prevosti., C. notahis, and Tomeutes 

 vittatiijS the ear is less prominent than in Ratufa., and its points 

 of attachment to the head in front and behind ai'e somewhat 

 higher. In C. p)'evosti also its upper portion is narrower' and 

 more pointed. In C. vittatus and C. oiotatus the posterior edge 



