262 A NATURALIST IN MID-AFRICA. 



character, again appears, and rising to a height of 

 from 8,000 to 10,000 feet is continued to the ex- 

 treme south of Tanganyika. After the interrup- 

 tion of Lake Nyassa, the same central ridge of 

 high land is continued by the Livingstone moun- 

 tains, and does not finally end till the isolated 

 summit of Mlanje. 



Few seem to realise that there is this extra- 

 ordinary Central Ridge which is almost everywhere 

 from 8,000 to 10,000 feet high, and which may be 

 said to be about a thousand miles in length. 



Urundi consists of the eastern slopes of this 

 range, which are enclosed by the Ru-Vuvu and 

 Akenjaru branches of the Kagera. 



Ruanda, or more properly Kishakka, occupies 

 the left bank of Akenjaru, and so far as I have 

 been able to discover, Uhha occupies the right 

 bank of the Ru-Vuvu. 



From this main Kiriba there are two minor 

 transverse ridges. One of these is that already 

 noticed as dividing the Akenjaru from a swamp- 

 river which occurs in Visanganwi's country ; 

 Bugufu is situated on a part of it. 



The other separates Visanganwi's and other 

 branches of the Ru-Vuvu from an important 

 stream, Nyankulu. This minor ridge is the one 

 on which Mwesi's capital is situated, and is called 

 " Misossi ya Mwesi." The actual site of his 

 town is apparently on the southern side of a bold 

 conspicuous hill, which is about 15 to 20 miles (at 

 a guess) from the main Kiriba chain. 



