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 im 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 2h. 
tichorhinus (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 @), the view across 
the posterior half of which is uninterrupted. In the Rhi- 
noceros tichorhinus 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 
