On Two neio African Barbels. 369 



XLV. — Descriptions of Two new African Barbels. 

 By G. A. BOULENGER, F.R.S. 



(Published by peruiissiou of the Trustees of the British Museum.) 



Barb us somereni. 



Depth of body 3f times in total leng-tli, length of head 

 A\ times. Snout rounded, 3 times in leiigtii of head ; eye 

 5 times in length of head, inteiorbital widtli 2f times; 

 mouth subinferior, its width 2f times in length of liead ; 

 lips moderately developed, lower continuous across the chin ; 

 two barbels on each side, anterior X^^ posterior 1^ diameters 

 of eye. Dorsal III 10, equally distant from occiput and 

 from root of caudal, border straight ; last simple ray strong, 

 bony, not serrated, shorter than head. Anal III 5, not 

 reaching caudal. Pectoral | length of head, not reaching 

 ventral ; latter below anterior rays of dorsal. Caudal 

 peduncle If times as long as deep. Scales longitudinally 



striated, 33^, 3 between lateral line and ventral, 12 round 

 '62' . . . 



caudal peduncle. Brownish above, whitish beneath (has 

 been in formaline). 



Total length 205 mm. 



A single specimen, now in the British Museum, was ob- 

 tained by Dr. van Someren in the Sebvve River, a snow-water 

 stream on Mount Ruwenzori, in Uganda, at an altitude of 

 6000 feet. 



Tiie higher number of scales and the shorter spine of the 

 dorsal fin well distinguish tliis new species from B. Jiindii, 

 Blgr., one of the few Barbels with as many as 10 branched 

 rays in the dorsal tin. 



Barbus ahoinensis. 



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

 3^ to 3^ times. Snout rounded, as long as eye, whicii is 

 3^ to 3| times in length of head ; interorbital width 2f to 

 3 times in length of head ; mouth subinferior, small ; lips 

 moderate ; two barbels on each side, anterior a little shorter 

 than eye, posterior as long as or a little longer than eye. 

 Dorsal 111 8, equally distant from centre or posterior border 

 of eye and trom caudal, border slightly concave ; last simple 

 ray not enlarged, not serrated, a little shorter than head. 

 Anal III 5, not reaching caudal. Pectoral | length of head, 

 not reaching ventral ; base of latter below anterior rays of 

 dorsal. Caudal peduncle l^ times as long as deep. Scales 



