1867.] DR. J. E. GRAY ON THE RHINOCEROTIDiE. 1025 



R. africanus, Desm. Mamm. 400 ; Harris, Portraits of "Wild Ani- 

 mals of S. A. 81, t. 11 (horns at p. 85) ; Duvernoy, Arch, du Mus. 

 vii. t. 8. 



R. brucei, Blainv. 



R. niger, Schinz, Syn, Mamm. 335. 



Rhinaster bicornis. Gray; Gerrard, Cat. Bones B. M. 282. 



In the British Museum there is the skull of a nearly adult animal. 



In the Museum of the Royal College of Surgeons is a very fine 

 skull of an adult of this species (no. 2941), and the upper jaw co- 

 vered with skin (no. 2942) and with the two horns attached to it. 

 The horns are both circular at the base, and regular, conical, and blunt 

 at the tip. 



Schinz, who compiled a Monograph of this genus, in his Synopsis 

 named a species R. niger, after Capt. Alexander's description of the 

 Black Rhinoceros in his * Travels into the Interior of South Africa.' 



B. Nose rounded in front ; upper lip acute in the middle. Skull : — 

 face short — that is, from front of orbit to nasal, not so long as 

 from same jwint to occipital condyle ; nasal rounded in front. 

 Keitloa. 



2. Rhinaster keitloa. The Keitloa or Ketloa. B.M. 



Upper lip with a central prominence, acute ; horns elongate, hinder 

 compressed, sharp-edged, often as long as the front one, front one 

 rather compressed, recurved ; shoulder without any hunch ; skin 

 pale yellow brown ; skull short ; face short from front edge of the 

 orbit to the end of the nasal, not so long as from the front edge of 

 orbit to occipital condyle. 



Var. 1. Keitloa. The horns of nearly equal length; the hinder 

 compressed, sharp-edged before and behind ; the front one rather 

 compressed, broad and flat in front. 



Rhinoceros horn. Parsons, Phil. Trans. Ivi. 32, t. 2. f. 8, 9. B.M. 



Rhinoceros ketloa or keitloa, A. Smith, Cat. S. A. Mus. p. 7, 

 1837; Illust. Zool. S. A. t. 1; Schinz, Syn. Mam. 337. 



Rhinaster keitloa. Gray, List Mamm. B. M. ; Gerrard, Cat. Bones 

 B.M. 



Var. 2. camperi. The horns both compressed and sharp-edged 

 in front and behind, the front one twice as long as the hinder ; upper 

 lip with acute central prominence. 



Rhinoceros bicortiis capensis, P. Camper, Act. Petrop. 1777, ii. 

 193, t. 3, 4, 5, 6 (copied Blumenbach, Abbild. t. 7. f. «). 



Rhinoceros bicornis (adult), Cuvier, Oss. Foss. ii. t. 4. f. 5 (skull 

 copied from Camper). 



Rhinoceros , Sparrman, Voy. ii. t. 3. 



R. camperi, Schinz, Syn. Mamm. ii. 335 ; Monogr. t. I. 



Black Rhinoceros, Baker, Albert Nyanza, ii. 275; Nile Tributaries, 

 fig. at p. 365 (head and horns^. 



Hab. South Africa (Dr. A. Smith's type i.i B. M.). 



