370 SILTJEIDjE. 



branched rays, prolonged into a long filament, the second soft ray being more than 

 twice as long as the head. Adipose dorsal fin twice and a half to three times as long 

 as deep, narrowly separated from the rayed dorsal. Anal fin pointed, with 12 rays, 

 8 of which are branched. Pectoral spine a little longer than the head, moderately 

 serrated on the outer edge, with 15 or 16 very strong serrse on the inner side, not 

 reaching the ventral fin. Latter pointed, reaching the origin of the anal fin. Caudal 

 fin deeply forked, upper lobe much produced. Caudal peduncle a little deeper 

 than long. 



Dark grey-brown (olive in life, according to Mr. Loat's coloured sketch), with a few 

 round blackish spots on the head, back, and adipose fin ; fins grey or olive, with 

 numerous small round black spots; fringe of maxillary barbels black; iris pale 

 reddish brown. 



Total length 195 millimetres. 



Measurements (in millimetres). 



1. 2. 



Total length (without caudal) 170 147 



Greatest depth 57 48 



Length of head 50 39 



Width of head 42 35 



Length of snout 20 15 



Diameter of eye 12 11 



Interorbital width 21 17 



Width of mouth 14 11 



Maxillary barbel 74 62 



Outer mandibular barbel 35 32 



Inner mandibular barbel 20 16 



Length of dorsal spine 59 52 



Basal length of dorsal fin 39 35 



„ „ adipose fin 49 41 



Greatest depth of adipose fin . . 17 16 



Length of pectoral spine 53 46 



This very remarkable species was described from a single specimen (no. 2 of table 

 of measurements) first labelled as from the mouth of Lake No, but which came 

 from further down the White Nile, It was taken with hook and line by Mr. Loat's 

 companion, Mr. G. D. Gunn, at Goz abu Gumah, on January 7th, 1901. A second 

 somewhat larger specimen was taken at the same place by Mr. Loat, on May 2nd 

 of the same year. 



