Chapter VII. 



present marshy levels are the result. Lake Biijuku is a 

 survival of one of these ancient basins. 



In the Mobuku and Bujuku Valleys towards 10,000 feet 

 the damp and mild climate specially favours the development of 



SEXECIO AND LOBELIA STUHLMAX.NL 



lycopodium, mosses, and lichens which clothe the sides and 

 bottoms of the valleys, and cover the trunks of the living 

 trees or of those that have flillen from old age. At this 

 height the valleys are clad with a dense forest of heaths and 



228 



