366 RHINOCEROS. 



personal exertions, at the same time and place, the whole 

 of the upper portion of the cranium, with a considerable 

 proportion of the occiput, and a fragment of the upper 

 jaw with the last molar tooth in situ ; other upper molars 

 being found detached, but in close proximity with the 

 cranium. The side-view of this portion of cranium (fig. 

 131), reduced to the same proportion as that of the Rh. 

 ticTiorTiinus (fig. 120), shows the minor degree of elevation 

 of the interorbital platform supporting the second or 

 frontal horn, the minor degree of concavity between this 

 surface and the cranium proper, the greater length of the 

 nasal aperture, and the less prominent or convex con- 

 tour of the anterior and rougher surface for the nasal 

 horn : the limited extent of the bony partition-wall (s 

 s), dividing the nasal cavity, and supporting the nasal 

 bone, is also shown in this view, the lower part of the 

 wall being broken away, but not the posterior margin, 

 which terminates by a smooth rounded border. The bony 

 partition-wall extends, in fact, from the anterior end of 

 the nasal bones, only half-way towards the posterior 

 boundary of the nasal apertures (a a), the view across 

 the posterior half of which is uninterrupted. In the Rhi- 

 noceros tichorMnus the bony septum extends from the 

 fore-part of the nose to the vomer behind, and serves to 

 support not only the nasal, but the frontal horn. That 

 the well-marked but interesting transitional character of 

 the partial bony septum is not a fallacious appearance due 

 to accidental loss or fracture, is demonstrated by the 

 under or inner surface of the nasal platform, of which 

 a reduced view is given in fig. 138. This surface, be- 

 hind the bony septum (s s), is quite smooth and free from 

 any marks of sutural attachment of an unanchylosed 

 prolongation of a bony vomer; the surface is slightly 



