162 MIOCENE OE THE YICTOBIA NYAXZA, ETC. [June 1914,. 



EXPLANATION OF PLATES XX-XXVI. 

 Plate XX. 



Upper end of gully at Nira, looking north-east by east, showing the 

 Upper Series. (See p. 130.) 



Plate XXI. 



Kachuku, upper end of gully, looking north-eastwards, showing part of the 

 Upper and the Middle Series ; the basaltic peak of Nundowat is seen 

 in the distance. (See p. 131.) 



Plate XXII. 



Fig. 1. Gully of West Kachuku, looking north-north-westwards, showing the 

 ledge of calcareous conglomerate (Bed 30) ; the basaltic hill of Nira 

 is seen in the distance. (See p. 133.) 

 2. Lower part of Kachuku Gully, looking north-eastwards, showing the 

 Upper Gravel Zone of Bed 31, containing Dinotherium, Anthraco- 

 theres, giant tortoise, etc. ; the basaltic peak of Nundowat is seen 

 in the distance. (See p. 133.) 



Plate XXIII. 



Fig. 1. Gorge of the Kuja, looking east-north-eastwards, showing the exit of 

 the river from the Vinyo Escarpment. (See p. 149.) 

 2. Edge of the Manga Escarpment (quartzite), with the dolerite-sill at its 

 base forming the fertile district of Kitutu. (See p. 151.) 



Plate XXIV. 

 Crater-lake of Simbi, looking south-eastwards. (See p. 156.) 



Plate XXV. 



Geological map of the district between the Victoria Nyanza and the Kisii 

 Highlands, on the scale of 4^ miles to the inch, or 1 : 285,120. 



Plate XXVI. 



Fig. 1. Geological map of the neighbourhood of Karungu, showing the outcrop 

 of the Miocene deposits at Nira, Kachuku, and Kikongo, on the 

 scale of 2 miles to the inch, or 1 : 126,720. 



2. Plan of the outcrop of the Miocene deposits at Nira, on the scale of 



75 yards to the inch, or 1 : 2700. 



3. Plan of the outcrop of the Miocene deposits at Kachuku, on the scale 



of 75 yards to the inch, or 1 : 2700. 



