408 



Annals of the South African Museum. 



terminal ; lips moderate. Two barbels on each side, anterior -J- to f, 

 diameter of eye, posterior about as long as eye. 



Dorsal iii 7 ; equally distant from eye and from root of caudal, 

 border nearly straight ; last simple ray strong, bony, serrated, f to ; 

 length of head. Anal iii 5 ; not reaching caudal. Pectoral f to f 

 length of head, reaching or scarcely reaching to ventral ; first ray 

 of latter slightly in advance of dorsal. Caudal peduncle 2 to 2i times 



as long as deep. Scales radiately striated, 35-37 ^|, 3 between lateral 

 line and ventral, 14 round caudal peduncle. 



PIG. 65. Barbits lonflicaitda. 



Colour (of preserved specimens), pale brown, a little darker above 

 than beneath. In the living state they were markedly paler in 

 colour than specimens of B. anoplus found in the stream outside this 

 same cave. 



Six specimens, ranging from 33-43 mm. in length, from a cave 

 at Wonderfontein, Transvaal. 



It is also reported from the Lower Zambezi and Athi Eiver System, 

 East Africa. 



I 



37. BAKBUS RAPAX, Stdr. 



(Silver-fish.) 



Steind., Sitzb. Ak. Wien, ciii., i., 1894, p. 451, pi. iv., fig. 2 ; 

 Bouleng., Proc. Zool. Soc., 1907, p. 307, and Cat. Fresh. 

 Fish. Afr., ii., p. 119, fig. 95 (1911). 



Depth of body 3| to 4 times in total length excluding caudal, 

 length of head 3^ to 3^ times. Snout rather pointed, 3^ to 3f 

 times in length of head, eye 4 T 3 n to 6| times, interorbital width 3f 

 to 4J times ; top of head depressed ; mouth terminal, its width 

 2*- to 4 times in length of head ; chin projecting (specially notable 

 in large specimens) ; lips moderate, interrupted on chin. Two 



