g cipmxim:. 



Sc. 30-41 fi~i, 2|-3 ; posterior barbel at least 

 as long as eye ; width of mouth 2.1 -15 times 



in length of head 45. B. eurystomus, Keilh., p. 64. 



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

 rays. 

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



head, 3i-3f times in total length . . . • 46. B. zuah-us, Blgr., p. 64. 



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

 length of head. 

 Sc. 31-36 4-Ffj, 2^-3 ; posterior barbel 1^-lf 

 diameters of eye ; dorsal with 8-9 branched 

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



Sc. 28 if, 2£ ; posterior barbel twice as long as 



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

 Sc. 29 'gf, 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£ times in length of head ; dorsal with 

 8-9 branched rays. 

 Sc. 30-33 % 2-2 .V ; posterior barbel 1£-1§ dia " 



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



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



9-10 branched rays. 

 51 

 Sc. 33-34 g|, 2 J -3 ; posterior barbel not longer 



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



length of head ; spine of dorsal | to once 



length of bead 51. B. j>lagiostomus, Blgr., p. 68. 



5- 



Sc. 30 gf , 2i ; posterior barbel a little longer 



than eye ; width of mouth 2n- times in length 



of head ; spine of dorsal £ length of head . 52. B. Ungeri, Pellegr., p. 69. 

 Sc. 28-30 |f, 2-lH ; posterior barbel 1J-1J- 



diameter.-j of eye ; width of mouth 3^-4 



times in length of head ; spine of dorsal 



§-§ length of head 53. B. bottegi, Blgr., p. 70. 



Sc. 25-30 |f, 2 ; posterior barbel not longer 



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



length of head ; spine of dorsal as long as 



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



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



branched rays. [p. 72. 



Sc. 28-29 5!, 2 ; posterior barbel as long as eye. 55. B. pagenstecheri, J. Gr. Fisch. 



