232 
TEAVELS IN CENTEAL AFEICA. 
single specimens^ like that described by Ruppell, may be carried 
down towards the mouth of the river. 
Auchenaspis. 
Body scaleless. Adipose fin rather long; dorsal shorty with a 
pungent spine and with seven rays ; anal short. Snout produced^ 
pointed^ with narrow mouth ; barbels six. The teeth of each jaw 
form a pair of small elliptic patches^ which are longer than broad ; 
palate edentulous. Nostrils distant from each other; eyes of mode- 
rate size. Gill membrane scarcely notched at the throat. Ventral 
with six raySj situated far behind the pectorals. 
Auchenaspis hiscutatus^ Geofir. {Karafchi.) 
D. 1/7. A. 11—12. P. 1/9. 
Head coarsely granulated above ; occipital process very broad^, 
with the lateral margins convex^ joining the very large saddle- 
shaped dorsal plate. Snout produced_, pointed^ with broad lips 
and with a narrow mouth. Barbels cylindrical, shorter than the 
head, the outer ones of the mandible being shorter than those of 
the maxillaries. Dorsal and pectoral spines strong, nearly equal in 
length, rather more than half as long as the head. The length of 
the adipose fin is two-sevenths or one-fourth of the total (without 
