332 SILUEID^E. 



hand of teeth six or seven times as long as broad, shorter than and as broad as or a 

 little narrower than the vomerine band. Nasal barbel one-seventh (adult) to 

 one-third the length of the head; maxillary barbel once and one-fourth (adult) 

 to twice and one-third the length of the head, extending barely to the end of the 

 pectoral fin in the adult, to the end of the ventral fin in the young ; outer mandibular 

 barbels once and a half to once and five-sixths the length of the inner and one-half 

 to nearly once the length of the head. Gill-rakers rather long, widely set, 10 or 11 

 on lower part of anterior arch. Dorsal fin with I 9 rays, the last in advance of the 

 vertical of the inner ray of the ventral fin ; spine smooth, less than half the length 

 of the head ; longest soft ray one-half to three-fourths the length of the head. 

 Adipose dorsal fin four to five and a half times as long as deep, once and a half to 

 once and two-thirds as long as the rayed dorsal ; the space between the two dorsal fins 

 one-half to two-thirds the length of the first. Anal fin with 12 or 13 rays, 8 or 9 of 

 which are branched. Pectoral fin one-half to three-fifths the length of the head, its spine 

 moderately strong, not serrated in the adult. Ventral fin equally distant from the eye 

 and the root of the caudal fin, or a little nearer the latter. Caudal fin deeply forked, 

 the upper lobe produced into a long filament. Caudal peduncle not or but little 

 longer than deep. 



Blackish brown or dark steel-blue above, whitish or brassy yellow beneath ; fins grey 

 to blackish ; iris dark, with a vivid yellow ring. 



Total length of largest specimen 490 millimetres. 



Seven specimens were obtained by Mr. E. Degen in Lake Victoria, at Entebbe, 

 Sept. 9th to Oct. 10th, 1905. Native name Semutundu. 



This species stands very near the preceding, from which it is distinguished by the 

 shorter barbels and the smaller adipose dorsal fin. 



