from the Quanza and Bengo Rivers. 549 



II. One pair of barbels, sometimes very minute and bidden in tbe folds 

 at angle of mouth. 



A. 30—39 scales in lateral line ; last simple ray of dorsal strong and 



ossified; 9 to 11 branched rays in the dorsal. 



1. Snout much broader than long; rounded papilhe in front of 



and behind mouth. 



Sc. 35 g|, 3, 14 ; ventral below anterior rays 



of dorsal ; barbel £ diameter of eye V. varicostoma, Blgr. 



2. Snout a little broader than long ; barbel minute ; ventral 



below middle of dorsal. 



Sc. 31 J, 2\, 12; eye 4§ times in length of 



head . .. .^ V. tornieri, Stdr. 



Sc. 30-35 ^#, 3-3|, 12-14; eye not more 



than 4 times in length of head V. steindachneri, Blgr. 



3. Snout much broader than long ; barbel minute ; ventral below 



anterior soft rays of dorsal. 



Sc. 30-35 §jf,2-3, 12; eye 4 to 6 times in 



length of head V. beso, Riipp. 



Sc. 34-39 M, 3-3^, 12-14 ; eye 3 to 34. times 



in length of head V, latirostris, Blgr. 



B. More than 40 scales in lateral line. 

 'Sc. 43-46 |jEj|, 4-5, 16; dorsal with the last 



simple ray slender and flexible, followed by 



10-11 branched rays V. maroccanus, Gthr. 



Sc. 64-70 JJlJJL 9-10, 32-34 ; dorsal with 

 the last simple ray strong and ossified, 

 followed by 8-9 branched rays V. tanganicce, Blgr. 



19. Bar bus ensis, sp. n. 



Depth of body 3^ to 4^ times in total length, length of 

 head 31 to 3^ times. Snout rounded, 3 times in length of 

 head ; eye 2f to 3^ times in length of head, interorbital 

 ■width 3 to 3^ times ; mouth inferior, its width 4 times 

 in length of head ; lips moderately or rather strongly 

 developed, lower continuous across chin, where it may form 

 a rather long rounded lobe; two barbels on each side, 

 anterior about f length of eye, posterior as long as eye or 

 slightly longer. Dorsal IV 9, equally distant from centre 

 or anterior border of eye and from root of caudal, border 

 concave, last simple ray extremely strong, bony, not serrated, 

 straight, 1\ to If times length of head. Anal III 5, not 

 reaching caudal. Pectoral shorter than head, not reaching 

 ventral ; base of latter below anterior rays of dorsal. Caudal 

 peduncle twice as long as deep. Scales finely striated longi- 



