204 
TRAVELS IN CENTRAL AFRICA. 
Lower Nile. Upper Nile. West Africa. 
Haplocliilus fasciolatus . 
o 
X 
X 
Labeo niloticus 
X 
X 
o 
Labeo eoubie .... 
X 
X 
o 
Labeo for shalii .... 
X 
X 
o 
Barbus bynni .... 
X 
X 
o 
Barbus perince .... 
X 
o 
o 
Barilms niloticus 
X 
o 
o 
Barilius tliebensis 
X 
o 
o 
Barilius bibie .... 
X 
o 
o 
Glupnafieta ..... 
X 
o 
o 
Heterotis niloticus 
X 
X 
X 
Anguilla vulgaris .... 
X 
o 
o 
Anguilla latirostris 
X 
o 
o 
Tetrodon fahaha .... 
X 
X 
X 
Bolypterus bicliir .... 
X 
X 
X 
Bolypterus senegalensis 
X 
X 
X 
Lepidosiren annectens . 
o 
X 
X 
All tlie species_, described by Eiippell^ from Lake Zana^ are 
Barbels,,* viz., 
Bari us surhis. Barliis gorguari. 
Barlus intermedins. Barbus elongatus. 
Barbus affiyds. Barbus nedgia. 
It is evident from the peculiarly simple course of the Nile and 
the absence of tributaries in its lower portion^ which would con- 
nect it with systems of other rivers^ that the Fauna of this part is 
* The fish described by Riippell as Chondrostoma demhensis cannot be admitted 
into the system ; Ruppell himself omits it in a later list. It appears to have been 
some young fish. 
