BAHBUS. 



77 



chin ; two barbels on each side, subequal, as long as eye. Dorsal III 8, 

 equally distant from eye and from root of caudal, border rather convex ; 

 last simple ray feebly enlarged, ossified, smooth, ^ length of head. 

 Anal III 5, not reaching caudal. Pectoral a little shorter than head, 

 not reaching ventral ; base of latter below middle of dorsal. Caudal 

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



Fiff. 54. 



Barhus plaliirliinus. 

 Type (Tr. Z. S. 1901). 



40 



•'2 "^ 



5i 



, 3^ between lateral line and ventral, 16 round caudal peduncle. 



Olive-brown above, golden yellow beneath. 



Total length 390 millim. 



Lake Tanganyika. 

 1. Type. Usainbma. 



Prof. J. E. 8. Moore (0.). 



G2. BARBUS NYASS^. 

 Keilliack, Sitzb. Ges. naturf. Fr. Berl. 1908, p. 165. 



Depth of body ?>\ to 4 times in total length, length of head 43- times. 

 Snout pointed, prominent, 2| times in length of head ; eye 4 times in 

 length of head, interorbital width 2J times ; mouth inferior, transverse, 

 its width 2f times in length of head ; lower jaw with a sharp edge ; 

 lips feebly developed, lower restricted to the sides ; two barbels on each 

 side, posterior a little longer than anterior and not quite \ diameter of 

 eye. Dorsal IV 9, border concave ; last simple ray strong, bony, not 

 serrated, nearly as long as head. Anal 111 5, not quite reaching caudal. 

 Pectoral | length of head. Ventral below middle of dorsal. Caudal 



6- 



peduncle If times as long as deep. Scales 36-40 g?, 4 between lateral 

 line and ventral. 



Total length 118 millim. 



I^ake Nyassa. — Type in Berlin Museum. 



