18/3.] SIR V. BROOKE ON THE GENUS GAZELLA. 541 



1850. Gazella rufifrons, Gray, Knowsley Menagerie. 



1853. G. kevel!a,Temm. Esq. Zool. p. 193. 



1855. G. Icevipes, Wagn. Saugeth. p. 404 (part.). 



1858. G. corinna, Loche, Cat. Mamm. de l'Alg. p. 14 ? 



1863. A. Icevipes, Heugl. Ant. u. Buff. p. 6. 



Central facial streak uniform sandy yellow ; light facial streak 

 indefinite ; dark facial hardly distinguishable from the colour of the 

 cheeks, which are sandy yellow ; dark lateral band distinctly marked, 

 brown ; light lateral band plainly shown between the dark streak 

 and the yellowish fawn-colour of the back and haunches ; pygal 

 band indistinct. No knee-brushes. Height a little over two feet. 



Hab. Senegal. 



4. Gazella l^vipes. 



1846. A. Icevipes, Sund. Pec. p. 266. 

 1855. G. Icevipes, Wagn. Saugeth. p. 404 (part.). 

 1863. A. Icevipes, Heugl. Ant. und Buff. p. 6. 

 1869. , Heugl. tteis. Weiss. Nil, p. 31 5. 



Central facial band rufous, an indefinite nose-spot sometimes 

 present ; light facial streak fairly distinct, encircling the eye ; dark 

 facial streak scarcely distinguishable against the fawn-colour of the 

 cheeks ; dark lateral band very strongly marked, almost black ; 

 light lateral band very indistinct ; back and flanks of a deep foxy 

 rufous ; pygal band almost or entirely obsolete. Knee-brushes 

 sometimes absent and sometimes well developed. Tail long, black. 

 Horns short, compressed, strongly annulated, with the points turned 

 suddenly and pointing towards each other, and occasionally even 

 backwards and downwards. Ears rather short. Size considerably 

 larger than Gazella dorcas. 



Teeth. First molar in the lower jaw sometimes, but not invari- 

 ably, showing a supplementary column. 



The horns of the female in typical specimens nearly straight, an- 

 nulated, and slightly bent forwards from about half their length. 



Hab. Senaar {Sund.) ; Bogos country. 



As may be seen from the above descriptions, the points of differ- 

 ence between the Gazella rufifrons of Gray and the Gazella Icevipes 

 of Sundevall are of the most trivial and insignificant nature. I 

 have, however, considering the widely separated localities from which 

 the type specimens of the two descriptions were obtained, thought it 

 better for the present to leave the two names separate in this list. 

 The Gazella Icevipes appears to be the larger and more brightly 

 coloured animal of the two. In some specimens I have found the 

 knee-brushes wanting, as described by Professor Sundevall. This, 

 however, is by no means an invariable character. In a large series 

 of the skins of this Gazelle lately received by Mr. Gerrard from 

 the Bogos country, and which I had the pleasure of examining with 

 him, I found the knee-brushes invariably present, but varying very 

 greatly in length and colour. In all these skins, as also in a living 

 specimen entirely devoid of knee-brushes, which I saw in the Zoolo- 



