130 



THE TANGANYIKA PROBLEM. 



The fauna of the Albert Edward Nyanza is practically- 

 identical with that of the Albert Nyanza, the following 

 types having been obtained : — 



ALBERT EDWARD NYANZA. 



FISHES. 



SlLURID^E. 



4. Clarias lazeras. 



5. ,, moorii Blgr. 



ClCHLID/E. 



6. Tilapia nilotica Blgr. 



MOLLUSCA. 



[ 7. Melania tuberculata Mull. 



8. Unio stuhlmanni Marts 



9. ,, ngesianus Marts. 



10. Corbicula radiata Phil. 



11. Sphcerium species undetermined. 



LeI'IDOSIRENID/£. 



1. Protopterus aethiopicus Heac. 



CVI'RINIlt.'E. 



2. Barbus fergussonii Blgr. 



3. ,, edwardianus Blgr. 



1. Planorbis sudanicus Marts. 



2. Ampullaria erythrostoma Rv. 



3. Vivipara unicolor Ol. 



4. Cleopatra pirothi Jick. 



5. ,, exarata Marts. 



6. Bithynia alberti E. Sm. 



Passing to the east, we encounter the Victoria Nyanza, 

 the largest of all the African fresh-waters. This great lake 

 is swarming with living things, but the fauna, in a specific 

 sense, is by no means very profuse. When the genera of 

 which it is composed are considered, the fauna of this lake 

 is very comparable to that of Nyassa, and up to the present 

 is known to consist of the following types : — 



ClCHLID/K. 



Paratilapia longirostris Hilg. 

 ,, cavifrons Hilg. 



,, retrodens Hilg. 



,, serranus Blgr. 



Tilapia nilotica Cuv. 



,, nuchisquamulata Hilg. 

 ,, sauvagii Pfeff. 

 ,, obliquidens Hilg. 



Mastacembelid.*:. 

 Mastaceinbelus, sp. 



VICTORIA NYANZA. 

 FISHES. 



SlLURID.'E. 



10. Clarias Layera C. & V. 



11. Synodontis afrofischeri Hilg. 



Cyprinid^:. 



12. Labeo forskalii Rlipp. 



13. Labeo rueppellii Pfeff. 



,, victorianus Blgr. 



14. Barbus pagenstecheri Fisch. 



15. „ trimaciilatus Ptrs. 



16. Discogiiathus johnstoni Blgr. 



