4 CYPKINTDJE. 



el 



Sc 33-36 ciJjm , 4 ; posterior barbel If to 2 

 diameters of eye ; intei-orbital width 3 to ol 

 times in length o£ head ; lower lip not form- 

 ing a median lobe 6. B. rueppelU, Blgr., p. 25. 



<y. 27-39 scales in lateral line, 2^-3^ between lateral line and ventral §, 



12-14 round caudal peduncle ||. 



* Interorbital width 2A to 3 times in length of head If. 



f Depth of body much greater than length of head, 2-| to 3i times 



in total length ; posterior barbel usually longer than eye. 

 51 71 

 Sc. 31-39 Ji_J , 3-4; dorsal with 9 (rarely 8 



or 10) branched rays, its spine usually as 



long as head or longer ; posterior barbel 



1 to 1-| diameters of eye 1 . B. bynni, Forsk., p. 26. 



Sc. 32-34 5 -^, 2\ ; dorsal with 9 branched 



ravs, its spine longer than head ; posterior 



barbel a little longer than eye 8. B. ruepolii, Vincig., p. 23. 



Sc. 30-35 ^||, 21 ; dorsal with 9 branched 



rays, its spine shorter than head ; posterior 



barbel 1 (young) to 2 diameters of eye, 



much longer than anterior 9. B. erlangeri, Blgr., p. 29. 



Sc. 30 ri, 3 ; dorsal with 8 branched rays, its 



spine as long as head ; posterior barbel 1| 



diameters of eye, scarcely longer than an- 

 terior 10. B. kassamensis, Blgr., p. 30. 



Sc. 29-33 *y^, 2i-3; dorsal with 9 (rarely 8) 



branched rays, its spine shorter than head 



in adult : posterior barbel 1|— 2 diameters 



of eye, as long as or a little longer than 



anterior 11. B. duchesnii, Blgr., p. 31. 



si 



Sc. 27-28 rf, 2g ; dorsal with 8 branched rays, 



its spine longer than head in adult . . . 12. B. oecidentalis, Blgr., p. 32. 



tf Depth of body equal to or a little greater than length of head, 

 3 to 4-J times in total length ; posterior barbel not longer than 

 eye ; spine of dorsal shorter than head. 

 Sc. .",2-36 j|, 3-3i ; dorsal with 8 (rarely 9) 

 branched rays ; snout projecting consider- 

 ably beyond mouth 13. B. lobogenys, Blgr., p. 33. 



§ Exceptionally 4 in B. bj/nni, 2 in B. radcliffii, 



|| Exceptionally 16 in B. bynni. 



c Exceptionally 3.| times in B. margaritae. 



