656 MR. P. L. SCLATER ON THE RHINOCEROSES 
is much variation in the colour of both forms, and these terms do not well distinguish 
them—there can be no question that our specimen belongs to the latter category. The 
long extensile upper lip of our animal and the shape of its horns at once show that 
it is not referable to R. stmus, and that it belongs to the form of which the species 
(if there really be more than one) are commonly known as R. bicornis. The late Sir 
Fig. 7. 
Head of 2. bicornis, from specimen in Brit. Mus. 
Andrew Smith, an excellent authority on African mammals, was the first to separate 
a species from 2. bicornis under the name R. keitloa', distinguished principally by the 
two horns being equal or nearly equal in length, whereas in #. bicornis “ the posterior 
in neither sex is ever much beyond a third of the length of the anterior.’ On 
examining the stuffed specimens of these two supposed species in the gallery of the 
British Museum these differences are most satisfactorily apparent, as will be seen by 
the sketches which I exhibit (figs. 7 & 8). 
' See Illustr. Zool. S. Afr., Mammals, pl. 1. 
