8 CYPEINID^. 



Sc. 30-41 =?-77i, 2i-3 ; posterior barbel at- least 

 as long as eye ; width of mouth 2^-3 times 



in length of head 45. B. eio'vstomiis, Keilh., p. 64. 



tt Posterior barbel twice as long as eye ; dorsal with 10 branched 

 rays. 

 Sc. 33 Jl, 3 ; depth of body equal to length of 



head, 3i-3| times in total length . . . . 4f». 5. zuaicus, Bigr., p. 64. 



** Depth of body 2§-3 times in total length, much greater than 

 length of head. 

 Sc. 31-36 4^3, 2i-3 ; posterior barbel l^-lf 

 diameters of eye ; dorsal with 8-9 branched 

 rays 47. B. surkis, Riipp., p. 65. 



5- 

 Sc. 28 71, 2j ; posterior barbel twice as long as 



eye ; dorsal with 10 branched rays . . . 48. B. mathoice, Blgr., p. &&. 

 Sc. 29 A, 2^ ; posterior barbel f diameter of 



eye ; dorsal with 9 branched rays . . .49. B. meneliki, Pellegr., p. 67. 

 /3. Lower jaw with angular edge. 



* Interorbital width 3^-3^ tin)es in length of head ; dorsal with 

 8-9 branched rays. 

 Sc. 30-33 % 2-2 1 ; posterior barbel li-1? dia- 



'*2 



meters of eye 50. B. macmillani, Blgr., p. 67. 



** Interorbital width 2|-3 times in length of head ; dorsal with 

 9-10 branched rays. 

 Sc. 33-34 ?f, 2.\-3 ; posterior barbel not longer 

 than eye ; width of mouth 2^-3 times in 

 length of head ; spine of dorsal | to once 

 length of head 51. B. pJagiostomus, Blgr., ^. 68. 



Sc. 30 rf, 2^ ; posterior barbel a little longer 



02 



than eye ; width of mouth 2| times in length 



of head ; spine of dorsal ^ length of head . 52. B. hingeri, Pellegr., p. 69. 

 Sc. 28-30 3, 2-21 ; posterior barbel 1^-1 ^ 



*2 



diameters of eye ; width of mouth 3^-4 

 times in length of head ; spine of dorsal 

 |-| length of head 53. i?. bottegi, Blgr., p. 70. 



Sc. 25-30 ll, 2 ; posterior barbtd not longer 

 than eye ; width of mouth 3|-4 times in 

 length of head ; spine of dorsal as long as 



head 54. B. perplexicans, Blgr., p. 71. 



***■ Interorbital width 3 times in length of head ; dorsal with 8 



branched rays. [p- 72. 



Sc. 28-29 T^, 2 ; posterior barbel as long as eye . 55. B. pagenstecheri, J. G. Fisch. 



