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reaches in the west to the Congo river, but where the Monkeys 

 are concerned, this big river appears to be a definite boundary line. 

 The sonthern limit is not qiiite sharp, as certain représentatives 

 of the fauna of the big lorest also extend into other zoogeogra- 

 phical nnits. 



The big forest is, of course, rich in monkevs. We find there the 

 extremelv variable red Colobus Ellioti, a Guereza : Colobus occiden- 

 talis, and the short-nianed, black Colobus palliatus niawambicus. 

 Of Guenons with nasal spots at least two kinds inhabit the great 

 forest, viz. Cercopïthecus Schmidti enkainer and C. ascatiius cir- 

 rliorhiuus. It is possible that the former at least chiefly belongs 

 to the eastern and the latter to the western parts. The widelv 

 distributed /eucampyx - gvoup is represented in the big forest by 

 C. l. Carruthersi. Another monkev which also belongs to this 

 région is Cercocebus albigeiia itiiiicus. In addition to this lives in 

 the œquatorial forest a member of the Cercocebus agilis group : 

 C. fumosiis, and at the sonthern end of the forest perhaps another 

 race. The small Miopithecus talapoiii Pilettei bas not yet been 

 found in the a^quatorial forest proper, but only on Ruwenzori, 

 which, however, may be regarded as its eastern corner stone. The 

 rare Cercopithecus L'hoesti is in its typical form as vet only found 

 in this district, but its race (or aberration) C. L'h. Thoniasi bas 

 also been discovered in the Kivu région, and the pretty C. Denti 

 as well in the big forest as on the western shore of Tanganvika, 

 thus very far south. 



Il mav finallv be mentioned that the dark Baboon which inhabits 

 the forest possiblv is subspecifically distinct from Papio tessellatus 

 and to be termed P. silvestris. 



The Kivu région. 



The surroundings of Lake Kivu are little known. Typical for 

 the same appears to be the beautiful Cercopithecus Kandti, and a 

 spécimen of C. L/ioesti TJiomasi is reported to bave similar origin. 

 It appears also probable that this district is inhabited bv a separate 

 race of Colobus palliatus viz. Adolfi-friderici Matschie and in 

 the open countrv lives Papio tessellatus. 



