The Freshwater Fishes of South Africa. 371 



B. Last simple ray of dorsal more or less enlarged, bony at least in the basal 

 third and serrated behind; two barbels on each side. 



() Base of ventral fin entirely in advance of dorsal. 



Sc. 42-43 -, 4-5, 20 ; dorsal with 8 branched rays ; 



mouth terminal 32. /,'. m-rrn. Peters. 



Sc. 33-36 |^, 3-4, 16-18: dorsal witli 7 branched 



rays (rarely 8) 33. />'. i><ilii<liiiiix, Peters. 



5A 

 Sc. 33 3, 14 ; dorsal with 7 branched rays . . 34. /.'. l>r<i<>/,-iii<ii, n. sp. 



Sc. 29-30 'j^, 2.J, Hi; dorsal with 8 branched rays . . 35. /.'. luiiiiiltniii, n. sp. 



(l>) Base of ventral entirely or partly below dorsal. 

 * Anal iritli 5 linnirlied rai/x. 



Sc. 35-37 , 3, 14 ; dorsal with 7 branched rays ; first 



ray of ventral slightly in advance of dorsal . . 36. 7.'. liiiifiii-intiln, Blgr. 



Sc. 30-33 , 2J-3, 14 ; dorsal with 8 branched 



rays ; ventral below or partly in advance of 

 anterior rays of dorsal ; mouth terminal ; caudal 

 peduncle If to twice as long as deep ...... 37. l'>. nipn.r, Stdr. 



Sc. 29-33 5 % 2i-3, 12-14 ; dorsal with 8 branched 



Of 



rays ; ventral below anterior rays of dorsal 



mouth sub-inferior ; caudal peduncle 1 to If 



times as long as deep ............ 38. B. argenteus, Ganth. 



Sc. 26 -|, 2, 12 ; dorsal with 7 branched rays; base 

 of ventral almost entirely in advance of dorsal ; 

 pectoral reaching or scarcely reaching caudal ; 

 caudal peduncle twice as long as deep ...... 39. B. ker*tcnii. Peters. 



Sc. 24-26 JT, 2J, 12 ; dorsal with 7 branched rays ; 



^5 



base of ventral partly in advance of dorsal ; 

 pectoral not reaching caudal ; caudal peduncle 

 1 to If as long as deep ............ 40. //. i-iittfnin, Blgr. 



* A/nil iritli (') Jiriniflicfl 

 Sc. 39-40 5 ^-*, 4, 10 ; dorsal with 8 branched ra 



"5 



base of ventral below middle of dorsal ...... 41. />'. capenxis, A. Smith. 



C. Last simple ray of dorsal enlarged, bony, more or less distinctly serrated 

 behind ; a single barbel on each side. 



Sc. 33-36 f|^t, 3-4, 14 ; dorsal with 7 branched rays, 



3 2~"2 



spine feebly serrated in its upper part only. . . . 42. /,'. trevelyani, Giinth- 



5^ 

 Sc. 31 -*, 2|, l(j ; dorsal with 8 branched rays, its 



spine strongly serrated in its upper half . . . . 4o. /.'. .V/T///II, n. sp. 



