1901.] FISHES FKOM LAKE VICTORIA. 159 



In the young the length of the head is 4 times in the length 

 from snout to vent, the diameter of the eye 8 times in the length 

 of the head and twice in the interocular width ; dorsal fin origi- 

 natiug a little nearer the vent than the head ; pectoral tin 2| length 

 of head, ventral fin 1§ ; vent dextral ; about 65 scales in a longi- 

 tudinal series to above vent and 40 round middle of body ; no 

 traces of external gills. 



2. MORMTRUS KANNUilE Forsk. 



3. Labeo victorianus, sp. n. 



Body compressed, its depth equal to length of head and con- 

 tained 4^ to 4-| times in total length. Head 1^ as long as broad ; 

 snout rounded, strongly projecting beyond the mouth, with small 

 horny warts ; eye perfectly lateral, in the middle or a little anterior 

 to the middle of the head, its diameter 6 to 6^ times in length of 

 head, 3 to 3i times in width of interorbital region, which is slightly 

 convex ; width of mouth, with lips, not much more than half greatest 

 width of head, 2i to 2| times in length of head ; rostral flap and 

 anterior border of lip not denticulated ; posterior border of lip very 

 indistinctly denticulated ; inner surface of lip with numerous 

 transverse plicae, formed of closely-set obtuse papillae ; a minute 

 barbel, hidden in the folds at the side of the mouth. Dorsal III 

 9-10, with notched upper border ; the longest ray equals the 

 length of head ; fin equally distant from the end of the snout and 

 the root of the caudal. Anal II 5 ; longest ray about | length of 

 head. Pectoral sub falciform, as long as head, not reaching base of 

 ventral. Ventral not reaching vent, its first ray falling under the 

 seventh (fourth branched) ray of the dorsal. Caudal deeply 

 forked, with pointed lobes. Caudal peduncle about li as long as 



deep. Scales 38-39 — ^ ; 4 or 5 series of scales between the 



15-80 



lateral line and the root of the ventral. Olive above, whitish 

 beneath ; fins greyish. 



Total length 285 millim. 



Three specimens. 



L. victorianus stands nearest to L. for si alii, from which the more 

 perfectly lateral eyes and the smaller mouth easily distinguish it. 



4. DiSCOGXATIIl'S .TOILXSTONI, sp. 11. 



Depth of body equal to length of head, 5 times in total length. 

 Head moderately depressed, with nearly flat interorhital region; 

 eye supero-hiteral, in the second half of the head, its diameter 4.\ 

 times in length of head, twice in interorbital width ; two very 

 short barbels on each side; width of mouth -.',- length of head; 

 upper lip moderately developed, lower large, Bemicircular ; do 

 denticulate fringe to the lips. Dorsal II 7, equally distant from 

 the nostrils and from the root of the caudal; firsl branched ray 

 Longest, § length of head. Anal II '>-. firsl branched ray Longest, 

 | length of head. Pectoral | length of head, widely separated 



