198 MIOCENE OF THE VICTORIA NXABTZA, ETC. [June 1914, 



Cleopatra exaeata (E. von Martens). (See p. 193.) 



Fig. 8. Front view of well-preserved testaceous specimen. 



9. Magnified view of the same, showing the early ornamentation of 

 the spire. Kachuku (Bed 19). 



Cleopatra bulimoides (Olivier). (See p. 192.) 



Fig. 10. Front view of specimen. 



11. Magnified view of the same, showing spiral sculpture on the nuclear 

 whorls. Nira (Bed 32). 



Achatina sp. indet. (See p. 194.) 



Fig. 12. Summit-fragment of individual with remains of sculpture striations. 

 Kachuku (Bed 24). 



Burtoa cf. nilotica (Pfeiffer). (See p. 195.) 



Fig. 13. View of a well-preserved summit showing a smooth and obtuse 

 apex, the later whorls being ornamented with oblique costulations. 

 Kachuku (Bed 21). 



Tropidophora. ntasana (E. A. Smith). (See p. 194.) 



Fig. 14. Front view of specimen, showing the rounded aperture and charac- 

 teristic sculpture of the species. Kikongo (Bed 8). 



Cerasttjs cf. M03LLENDORFFI Kobelt. (See p. 196.) 



Fig. 15. Front view of example showing aperture, etc. 



16. Magnification of sculpture, obscurely preserved in the same specimen. 

 Kachuku (Bed 31). 



Limicolaria sp. indet. (See p. 196.) 



Fig. 17. Front view of a fragmentary specimen showing the excavated colu- 

 mella. Kachuku (Bed 31). 



DlSCITSSIOX. 



Dr. A. Smith Woodward remarked on the interest of the 

 Author's demonstration of the great antiquity of the Victoria 

 Nyanza. The persistence of the species of non-marine mollusca 

 since Lower Miocene times was especially noteworthy,, even if their 

 distribution had slightly changed. 



The President (Dr. A. Stbahax) observed some reluctance on 

 the part of the Fellows to discuss a region which so few had been 

 able to visit, but he had been much impressed by the thoroughness 

 of the work carried out by the Author in various branches of 

 geology, and by the completeness with which he had illustrated the 

 ground by photographs taken under circumstances of exceptional 

 difficulty. 



The Author hoped that his work on the eastern coast of the 

 Victoria Nyanza might result in a search being instituted for 

 similar Miocene deposits at the mouths of the other large rivers 

 entering the lake ; and he expressed his thanks to the President 

 and to Dr. A. S. Woodward for their remarks, as also to the Fellows 

 of the Society for their kind reception of his paper. 



