372 Annals of the South African Museum. 



D. Last simple raj' of dorsal not enlarged, or but feebly enlarged, not serrated. 



1. Two barbels on each side. 



(a) Lateral line complete. 

 * Ventral originating wholly or partly in advance of dorsal. 



Sc. 32-34 ^^, 3-4, 12-14; dorsal with 7 

 branched rays, border straight ; ventral 

 wholly or partly anterior ; pectoral not 

 reaching ventral 44. 13. r<i///m/fi<s, Cast. 



54 

 Sc. 32-33 , 4-4 ; dorsal with 7 branched 



rays, border convex ; ventral originating 

 a little in advance of dorsal ; pectoral 

 reaching ventral 45. P>. motebeiiifiit, Stdr. 



** Ventral originating below anterior rays of dorsal. 

 Sc. 33-38 5^5, 4, 12; dorsal with 7 branched 



65 



rays ; pectoral not reaching ventral . . . . 46. B. burcJidU, A. Smith. 



Sc. 31-33 ^ 3, 12; dorsal with 7 branched 

 05 



rays ; pectoral nearly reaching ventral . . 47. B. burgi, Blgr. 



Sc. 31-35 3^, l-2$, 12; dorsal with 7 

 branched rays ; posterior barbel 1 to 1$ 

 diameter of eye 48. B. uuriici/i, Giinth. 



Sc. 30 |f , 2$, 12 ; dorsal with 8 branched rays, 

 border feebly concave ; caudal peduncle If 

 as long as deep 49. B. linmnutculatiut, Blgr. 



Sc. 29 jj, 2, 12 ; dorsal with 8 branched rays, 

 border straight ; caudal peduncle twice as 

 long as deep ; anal with only 2 spines . . 50. B. viviparus, M. Web. 



Sc. 27-30 ^f, 2-2$, 12 ; dorsal with 8 branched 

 4 4 " 



rays ; posterior barbel as long as or a little 



longer than eye 51. B. iinitaniatits, Giinth. 



Sc. 26-27 ||, 2; dorsal with 8 branched rays; 

 pectoral reaching ventral ; posterior barbel 

 a little shorter than eye 52. B. radiatus, Peters. 



*** Base of ventral wholly below dorsal. 



Sc. 35 ||, 3i, 14; dorsal with 3 branched 

 rays ; ventral below anterior half of 

 dorsal; upper lip with a median lobe .. 53. B. ltiliiulis, n. sp. 



Sc. 33-36 f|, 3-3*, 14-16; dorsal with 8 



Oo 



branched rays ; base of ventral behind 



anterior rays of dorsal 54. B. wai-rurus, n. sp. 



