BAKBUS. 



05 



of head, interorbital width 3^ times; mouth inferior, its width 4^ times 

 in length of head; lips moderately developed, lower interrupted on the 

 chin; two barbels on each side, equal in length, twice diameter of eye. 

 Dorsal IV 10, equally distant from occiput and from root of caudal ; 

 last simple ray very strong, bony, straight, f length of head. Anal III 5, 

 not reaching caudal. Pectoral a little shorter than head, not reaching 

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



ft 1 - 



nearly twice as long as deep. Scales longitudinally striated, 33 ^, 

 3 between lateral line and ventral, 12 round caudal peduncle. Dark 

 olive above, silvery white beneath. 



Total length 190 millim. 



Lake Zwai, Southern Ethiopia. 



1. Type. L. Zwai. Mr. P. 0. Zaphiro (C.) ; 



W. N. .McMillan, Esq. (P.). 



47. BAIIBUS SURKIS. 

 Riipp. Mus. Senckenb. ii. p. 5, pi. i. fig. 1 (1837); Boulang. Ann. & Mag. N. H. 

 (7) x. 1902, p. 424, and Fish. Nile, p. 226, pi. xlii. (1007). 



Depth of body 2§ to 3 times in total length, length of head of to 



Fig. 44. 



Barb as surkis. 

 Lake Tsana. i. 



41 times. Snout broad, rounded, 3| to 3± times in length of head ; eye 

 4i to 6 times in length of head, interorbital width 2£ to 3 times ; mouth 

 subinferior, its width 4 to 4£ times in length of head; lips moderately 

 developed, lower broadly interrupted on chin ; two barbels on each side, 

 anterior 1\ to H diameters of eye, posterior 1J to If. Dorsal IV 8-9, 

 equally distant from occiput and from caudal, border concave; last 



VOL. II. 



