176 



CTPEINIDiE. 



developed ; two barbels on each side, posterior the longer, £ diameter 

 of eye. Dorsal III 8, equally distant from eye and from caudal, border 

 feebly concave ; last simple ray not enlarged, not serrated, a little longer 

 than head. Anal III 5, not reaching eaudal. Pectoral f length of 

 head, nearly reaching ventral ; base of latter below anterior rays of 

 dorsal. Caudal peduncle 1^ times as long as deep. Scales radiately 

 striated, those of the lateral line series much deeper than the others, 

 22-23 p, 2 between lateral line and ventral, 8 round caudal peduncle. 

 Pale brown above, white beneath, the scales edged with crimson. 



Total length 40 millim. 



Upper Congo. — Types in Congo Museum, Tervueren. 



1. One of the types. Coquilhatville. M. P. Delbez (0.). 



173. BARBUS ASPER, sp. n. 



Depth of body 3§ to 4| times in total length, length of head 4 times. 



Snout rounded, 3 to 3| times in length of head ; eye 4 to 4^ times in 



length of head, interorbital width 3 times; mouth inferior; lips 



moderate ; a single barbel on each side, as long as or slightly longer 



Pig. 154. 



Bat-bus asper, 

 Male, type. 



than eye ; upper surface of head of breeding male with spine-like 

 tubercles, those on snout very large. Dorsal III 7, equally distant from 

 occiput and from caudal, border straight ; last simple ray not enlarged, 

 not serrated, § to f length of head. Anal III 5, not reaching caudal. 

 Pectoral a little shorter than head, nearly reaching ventral in males, not 

 in females ; base of ventral below anterior rays of dorsal. Caudal 

 peduncle If to If times as long as deep. Scales radiately striated, 

 37-42 &cgj> 5-6 between lateral line and ventral, 18-20 round caudal 



