BAKBUS. 



2L 



equally distant from occiput and from root of caudal, border concave ; 

 last simple ray very strong, long, not serrated, f to once length of head. 

 Anal II 5, not reaching caudal. Pectoral about f length of head, not 

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



Fig. 2. 



Barbus tropidolepis. 

 Type (A. M. C). h 



peduncle 1^ to If times as long as deep. Scales longitudinally striated, 

 44-46 gi, 5 between lateral line and ventral, 16 round caudal peduncle; 

 in most specimens, scales, at least those below lateral line on caudal 

 portion of body, bearing a median swelling or obtuse keel, these keels 

 forming together very regular longitudinal lines. Olive above, silvery 

 white beneath. 



Total length 550 millim. Grows to 1 metre. 



Lake Tanganyika. 



1-3. Types. [Jsambura. Prof. J. E. S. Moore (C). 



4. Ad. Niamkolo. Dr. W. A. Cunnington (0.). 



5. Yo-. Mbete. 

 0. Yg. Uvira. 



2. BARBUS POLYLEPIS. 

 Bouleng. Proc. Zool. Soc. 1907, p. 308, fig. 



Depth of body 4-g- times in total length, length of head 3^ times. 

 Snout rounded-subacuminate, 3 times in length of head, feebly pro- 

 jecting beyond mouth ; eye i\ times in length of head, interorbital 

 width 3} times ; mouth small, inferior, its width 4 times in length of 

 head ; lips well developed, lower continuous across chin ; two barbels 



