246 ZOOLOGY. 



front one; the diameters, three inches from the tip, being 

 1'2 in. and 1 in. 



In the young male in the Zoological Gardens, the 

 horns are comparatively short, especially the hinder- 

 most, larger at the base, blunt, and nearly circular in 

 section. 



How much of the variation in the three different 

 animals is due to age and sex, it is impossible to say 

 "without further information and additional specimens, 

 It is quite possible that the horns may be variable in 

 length, and in the extent to which they are compressed, 

 and yet that R. keitloa may be perfectly distinct 

 from R. bicornis. 



In both the animals killed by our party, the elongated 

 process of the upper lip was well developed, as it is 

 also in the Zoological Society's specimen. The neck 

 was rather long, and there was a distinct appearance 

 of a hump on the shoulder, just as represented in Dr. 

 Smith's figure. This was peculiarly conspicuous in the 

 larger animal after death, as it lay upon its beUy, with 

 its legs doubled beneath, a position taken by both 

 animals in dying. Immediately on returning to India 

 after leaving Abyssinia, and referring to Dr. Smith's 

 plates, I was struck by the great resemblance of his 

 figure of R. keitloa, in the characters of general form 

 as well as of the horns, to the Abyssinian animal, and 

 I was glad to find that Dr. Gray, from an examination 

 of the skull brought home by Mr. Jesse, arrived inde- 

 pendently at the same conclusion as to the specific 

 relations {A7m. and Mag. Nat. Hist. 1869, p. 201). 



