544 Mr. G. A. Boulenger on Fishes 



silvery beneath, with a more or less distinct dark lateral band 

 extending on the caudal fin, and a vertical dark bar above 

 pectoral ; fins greyish, tinged with vermilion. 



Numerous specimens, 38 to 60 mm. long, from the Bengo 

 River at Cabiri and from Lake Kilunda. 



Native name : Kamakanja. 



Most nearly related to P. hilgendorfi, Blgr. ; distinguished 

 by a shorter body, the shape of the anal fin in the males, 

 more numerous gill-rakers, and fewer scales in the lateral 

 line (31-33 instead of 35-36). 



11. Petersius ubalo, sp. n. 



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

 head 3f to 4 times. Head as long as deep, with slightly 

 concave upper profile ; lower jaw not projecting beyond 

 upper; snout much shorter than eye, which is 1\ to 2§ times 

 in length of head and equals interorbital width ; maxillary 

 extending to below anterior border of eye ; outer prsern axillary 

 teeth 4, alternating with those of the inner row, 8 in number ; 

 8 teeth in lower jaw. Gill-rakers rather long, 16-18 on 

 lower part of anterior arch. Dorsal II 8, originating above 

 base of ventral, longest ray as long as head. Anal III 18-20. 

 Pectoral as long as or a little shorter than head, not reaching 

 ventral. Caudal forked. Caudal peduncle as long as deep. 

 Scales 30-31 ^^r, 2 between lateral line and ventral. 

 Yellowish green above, silvery beneath; fins whitish; a 

 more or less distinct dark lateral band, terminating in 

 a rhomboidal black blotch on caudal peduncle and median 

 rays of caudal fin. 



Numerous specimens, 30 to 45 mm. long, from Lakes 

 Ru mango and Kilunda. 



Native name : Ubalo. 



Closely allied to the preceding species; distinguished by a 

 more elongate body, longer gill-rakers, fewer branched rays 

 in the anal fin (18-20 instead of 20-23), and especially by 

 the more normal shape of the dorsal and anal fins. 



Cyprinida?. 



12. Labeo rocadasi, sp. n. 



Body moderately compressed, its depth equal to or a 

 little less than length of head, 4 to 4| times in total length. 

 Head ]| to If times as long as broad; snout rounded or 



