from the Quanza and Bengo Rivers. 545 



obtusely pointed, strongly projecting, more or less swollen, 

 often with a more or less distinct curved transverse groove 

 above, its length ^ or a little more than ^ length of head (a 

 little less in the young) ; eye small, supero-lateral, 4 (young) 

 to 6 times in length of head ; interorbital width ? to ^ length 

 of head ; width of mouth ^, or a little less than i, length of 

 head ; lips strongly developed, upper straight-edged, lower 

 more or less expanded and bordered in front by a fringe of 

 papillae, the posterior border more or less distinctly festooned ; 

 inner surface of lips with small papillae forming numerous 

 transverse plicae ; rostral flap large, completely detached at 

 the sides, the edge more or less distinctly festooned or den- 

 ticulate ; a small barbel, concealed under folds of mouth ; 

 more or less developed horny tubercles (or their scars) on the 

 snout. Dorsal III 10 (rarely 9 or 11), equally distant from 

 end of snout or nostrils and from caudal, upper edge con- 

 cave, last simple ray and first branched ray longest, as long- 

 as head or a little longer. Anal III 5, not reaching root of 

 caudal. Pectoral as long as or a little longer than head, 

 not reaching ventral ; latter inserted below middle of dorsal. 

 Caudal deeply emarginate. Caudal peduncle If to 2 times 

 as long as deep. Scales 39-42 ^nf, 4-5 between lateral line 

 and ventral, 16 round caudal peduncle. Dark olive above, 

 whitish beneath ; fins greyish or bright red ; young with a 

 dark spot on each scale and a black blotch on caudal 

 peduncle. 



Numerous specimens, 40 to 250 mm. long, from the 

 Quanza and Lucalla Rivers. 



Closely allied to L.forskalii, Riipp. ; distinguished chiefly 

 by the longer caudal peduncle. 



13. Labeo ansorgii, Blgr. 



Originally described from a single young specimen from 

 Mossamedes, this species is represented in the present 

 collection by numerous specimens, 50 to 190 mm. in length, 

 from the Quanza and Bengo Rivers and Lake Kilunda. 



Except for the presence of an anterior small and often 

 quite rudimentary barbel, this species agrees closely with 

 L.forskalii. 



14. Varicorhinus ensifer, sp. n. 



Depth of body 3i to 4 times in total length, length of head 

 4^ to 5^ times. Snout rounded, a little broader than long, 

 as long as or a little longer than eye, Avhich is about 3 times 



