484: ZOOLOaiCAL EESULTS OF THE EUWENZOEI EXPEDITION. 



Ridgway) ; colour of rump not darker, but, on the contrary, passing gradually into the 

 paler tone of the hips and hind legs. Under surface from chin to anus, and inner 

 sides of limbs to wrists and ankles, clear creamy white, very sharply defined from 

 the darker colour, not only on the limbs, as in C. camphelli and others, but also along 

 the flanks, where the white rises nearly halfway up the lateral aspect of the animal. 

 Ears with short yellowish tufts rising from their inner surfaces. Outer sides of fore 

 limbs deep black from elbows. Hind limbs grizzled yellowish-olive, lighter than the 

 back, down to and including the ankles ; the metatarsals and toes black. Tail indis- 

 tinctly blackish above at the base, then dull greyish white for two-thirds of its length, 

 darkening again to black on its terminal third. 



Dimensions of the type (measured in the flesh) : — 



Head and body 501 mm. ; tail 850 ; hind foot 155 ; ear 40. 



Skull : greatest length 105 mm. ; basal length 75 ; breadth of brain-case 55 ; length 

 of upper cheek-tooth series 23. 



Hab. Between Mawambi and Avakubi, E. Congo Forest ; alt. 3000 ft. 



Type. A.(\\x\imdle. B.M. no. 7.1.2.1. Original number 184. Collected 23rd October, 

 1906, by Mr. E. E. Dent. 



This handsome Monkey is most nearly allied to the W. African C. campbelU, but 

 diflFers by its grizzled olive-yellowish instead of black hind limbs, the absence of black 

 on its posterior back, its more or less greyish-white tail, and by the high and sharply 

 defined line separating the colours of the flanks and belly. 



Cercopithecus denti is one of the most striking discoveries made by the members of 

 the Expedition. A figure of it has already been published. 



[This was the only example seen of this beautiful Monkey. The white belly rendered 

 it almost invisible from below. — E. B. W.] 



5. Cercopithecus leucamptx carrutheesi Pocock. 



2 . 225. Mubuku Valley, E. Ruwenzori. 10,000 ft. 



6. Cercopithecus leucamptx stuhlmanni Matsch. 



6 . 176. ? . 177. Mpanga Forest, Fort Portal. 



[These Monkeys were numerous on Ruwenzori up to 9500 ft., also in the Congo 

 and Mpanga Forests. They were most numerous on Ruwenzori, just where the forest 

 and bamboo zones intermingle, at 8500 ft., for, like the Chimpanzees, they frequent 

 the bamboo zone in search of the young shoots on which they feed. While thus 

 occupied they are occasionally surprised and killed by leopards, and probably on this 

 account they are most frequently seen where the bamboo and forest are mixed, where 

 they have a safe retreat. — R. B. W.] 



