Itelaiionsllip o/Gazella Isabella to Gazella doicas. 291 



llab. N. Nigeria. Type from Ibi. 



Type. All. S skin and skull. B.M. no. 7. 7. 5. 234. 

 Collected and presented by G. B. Gosling. 



Cervi'capra hohor ugandce, subsp. n. 



Size rather smaller than the above, with a shorter skull 

 and shorter horns. Body-colour grizzled, as in C. hohor 

 wardi. 



Colour of hair as in C. hohor loardi, only richer and darker, 

 more brown, and less fulvous. 



Dimensions of skull : — Greatest length 234 mm. ; occiput 

 to nasnls 124 ; nasals 88 ; orbit to gnathion 128 ; pre- 

 maxillaries 64 ; supraorbital width 108; mean widtii between 

 orbits 71 ; vertical diaineter of orbits 38 ; vertical lieight 

 from alveolar edge of first molar to top of orbits 75; zygo- 

 matic width 98; length on palatal suture 128; length o£ 

 upper dental series 56 ; central molar 13 X 12. 



Horns short and stout, without a pronounced hook forward 

 at ends. 



Hoh. Ankole, S.W. Uganda. 



Type. Old ^ skin and skull. B.M. no. 5. 4. 3. 34. Pre- 

 sented by Col. Delmd-RadclifFe. 



XXX. — On the Itelatlonship of Gazella Isabella to Gazella 

 dorcas, vith a Description of a new Species and Suhspecies, 

 By Gilbert Blaine. 



Since Gray first described Gazella isahella in 1846, a 

 difficulty has always existed in distinguishing it from 

 Gazella dorcas, and no satisfactory description has hitherto 

 been formulated to show how the two species differ, or by 

 what geographical limits they are separated from one another. 

 The ty|)e of Isabella is said to have come from Abyssinia. 

 It is an immature male, and consists of a skin and a skull 

 which is very imperfect, and Gray's description* of it is 

 short and rather vague. He subsequently refers to Isabella 

 as being found both in Egypt and in Kordofan. There are 

 in the B.M. collection four other specimens of gazelles from 

 Abyssinia, two males and two females, with which Gray's type 

 agrees fairly well. They are all adult, and so have longer 

 horns, the tips of which are hooked inwards nearly at a right 



» Gray, Ann. & Mag. Nat. Hist. (1) xviii. pp. 214, 231 (1846). 



20* 



