170 



A NATURALIST IN MID-AFRICA. 



destroyed by the water of the Nyanza. After 

 leaving Katwe the white tuff rock ceases at 

 the Nyamgassa river. At the other side of the 

 Kaihura straits, I think probably all the lakes 

 mentioned by Captain Lugard are of the same 

 formation ; and I saw myself similar whitish turf 

 rock as far south as Yisegwe's village along the 

 Albert Edward shore. 



The Karimi hill, which looks exactly like a 

 volcano, is towards the end of the ridge that 



mil Mil!/', I,/ 



Fig. 2G6. — Section of Figure 26a. 



stretches from this place to the shore of the 

 Albert Edward Nyanza, and separates the low 

 flat valley of the Semliki from the similar flat 

 plain which extends towards the Salt lake as far 

 as the Nyamgassa river. 



It is now possible to give a clear account of how 

 Kuwenzori may have come into existence. We 

 may suppose the site to have been once a part of 

 the original Victoria region plateau. Thus it con- 

 sisted of underlying gneissose rocks, covered by 



