153 — 



The Lake Leopold II région. 



This district mav probablv comprise the whole Congo basin 

 included vvithin the big curvature cf the mightv Congo river and 

 with Kasai river as its southern boundarv-line. As its fauna, at least 

 as far as the monkevs are concerned, hitherto chieflv is known 

 from the most western parts. I hâve preferred to cail it as above, 

 especially because the fauna tovvards Aruwimi might be somewhat 

 différent. This zoogeographical district is rich in monkevs and 

 appears in this respect to come next to the great aquatorial forest. 

 It has also species and subspecies of monkevs which correspond to 

 those of the last mentioned district. The red Colobus Lovizettii 

 substitutes C. EUioti, and the black, short-maned C. palliatiis 

 Weynsi plays the same parts as C. palliatiis inawnmhicus in the 

 great forest. It is however uncertain whether anj Guereza has 

 crossed the Congo river. The tufted Cercocebus aterriiiiiis replaces 

 C. alhigena ituricus. Cercopithecus elegans is in Aruwimi the 

 substitute of C. Dcnti on the other sida of the river. The fine 

 C. ]Vo/fi of the same group appears to be found through the whole 

 région. Of the Cercopithecus leucampyx group also a local form, 

 C. l. Maesi can be discerned hère. Of the nose-spotted Monkevs 

 Cercopithecus ascanius kassaicus appears to be the for this district 

 typical form, but C. ascaniiis ascauiiLs has also been collected at 

 some places, as it seems, at least chiefly in the western parts. 

 Finally the widely distributed C. Brazzœ is at home in this district 

 as well. 



The Kwango région. 



With this name may be designed the country to the south of 

 Kasai river. The beautiful Cercopithecus pyrogaster has been found 

 there and also C. ascanius ascanius and C . Brazzœ. Otherwise 

 this country is not much known as yet with regard to its fauna. 



