128 THE TANGANYIKA PROBLEM. 



LAKE MWERO. 

 FISHES. 



7. Chrysichthys sharpii Blgr. 



8. Auchenoglanis biscutatus Geoffr. 



9. Synodontis zambesensis Ptrs. 

 10. Synodontis ornatipinnis Blgr. 



Cichlid/e. 



Mormyrid^. 



1. Gnathonemus stanleyanus Blgr. 



2. Mormyrus longirostris Peters. 



Characinid.<e. 



3. Hydrocyon lineatus Blkr. 



4. Alestes macrophthalmus Gthr. „ p ara tilapia macrocephala Blgr. 



5. Alestes lemairii Blgr. I2 p arat ilapia mocruensis Blgr. 



Silurid/e. 13. Tilapia natalensis M. Web. 



6. Schilbe mystus L. (?) 14. Tilapia polyacanthus Blgr. 



In the above list the genera and species printed in italic are endemic to Lake Mwero. 



It is curious to note, moreover, that the Viviparas of Mwero 

 are not absolutely unlike the Neothauma of Lake Tanganyika. 



In continuing a general consideration of the faunas in the 

 remaining great African lakes it will be convenient to pass 

 now far to the north, omitting for the present Tanganyika 

 altogether, and to consider the remarkable fresh water 

 which is constituted by Lake Kivu. Kivu lies, as I have 

 shown elsewhere, in part of the continuation of the same 

 depression which contains Tanganyika, about ioo miles to 

 the south of it. But beyond the fact that the outflow of 

 Kivu finds its way into Tanganyika, the lakes appear to 

 have no connection one with another, and their faunas are 

 entirely distinct. The surface of Lake Kivu is 4,800 and 

 odd feet above the level of the sea, and its water, as I 

 have explained in Chapter V., contains a certain percentage 

 of magnesium carbonate in place of the more usual 

 modicum of sodium chloride which lake waters usually 

 possess. From its great height the climate of Kivu is 

 distinctly cool, and the fauna is poor in the extreme. 

 We obtained the following fishes : — 



KIVU. 



1. Tilapia nilotica L. 1757. 



2. Tilapia burtoni Gth. 1893. 



3. Paratilapia vitata Blgr. 1901. 



4. Paratilapia bloyeti Sauv. 1883. 



5. Barbus altianalis Blgr. 1901. 



