DISCOGNATHUS. 847 



peduncle. Upper parts and fins blackish olive ; lips, gular and pectoral 

 regions yellowish white, belly brown ; two round deep black spots on 

 the dorsal fin, in the middle of its base. 



Total length 110 millini. 



Lake Victoria and Nairobi River, Kilimandjaro. 



1. Type. Lake Victoria. Mr. W. G. Doggett (C.) ; 



Sir H. H. Johnston (P.). 



2. Ad. Nairobi R., Kilimandjaro, 6500 ft. A. B. Percival, Esq. (C). 



3. DISCOGNATHUS VINCIGUERR^. 



Bouleng. Proc. Zool. Soc. 1901, ii. p. IGO, and Fish. Nile, p. 185, pi. xxxi. fig. 4 

 (1907). 



Body feebly compressed, its depth 4^ to 5| times in total length. 

 Head moderately depressed, once and J as long as broad, \ total length ; 

 snout rounded, interorbital region nearly flat, its width not quite half 

 length of head ; eye lateral, but better visible from above than from 

 below, in middle of head, 3J times in length of head and once and f in 

 interorbital width ; width of mouth about ^ length of head ; upper 

 lip well developed, bordered by papillae forming a fringe ; lower lip 

 embracing a mental disk, which is about as long as broad ; two barbels 

 on each side, measuring f diameter of eye. Dorsal III 7, equally 

 distant from centre or posterior border of eye and from caudal ; first 



Fig. 261. 



Discognathus vinciguerrce. 

 Type (F. N.). 



branched ray longest, as long as head. Anal II o. Pectoral nearly as 

 long as head, widely separated from ventral, which is situated below 

 posterior half of dorsal. Caudal deeply emarginate. Caudal peduncle 

 as long as deep. Scales 35-38 gf, 3-3^ between lateral line and root of 

 ventral, 16 round caudal peduncle. Yellowish, the scales on the back 

 and sides finely speckled with brown, especially towards the border ; 

 a dark brown rhomboidal spot or vertical bar on the caudal peduncle 



