8 CYTBINIum. 



Se. 30-41 g-tgl) 2i-3 ; posterior barbel at least 

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

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



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



rays. 



5- 



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



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



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

 length of head. 

 Sc. 31-36 yf-ki, 24-3 ; posterior barbel l|-lf 

 diameters of eye ; dorsal with 8-9 branched 

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



5- 



Sc. 28 jf, 2i ; posterior barbel twice as long as 



eye ; dorsal with 10 branched rays . . . 48. B. mathoice, Blgr., p. 66. 



Se. 29 e§, 2i ; posterior barbel 3- diameter of 



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



/3. Lower jaw with angular edge. t 



i Interorbital width 3j-3^ times in length of head ; dorsal with 



8-9 branched rays. 



Sc. 30-33 % 2-2^ ; posterior barbel lj-lf 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. 

 51 

 Sc. 33-34 p, 2^-3 ; posterior barbel not longer 



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

 length of head ; spine of dorsal f to once 

 length of head 51. B. plagiostomus, Blgr., p. 68. 



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



than eye ; width of mouth 2| times in length 



of head ; spine of dorsal \ length of head . 52. B. bing'eri, Pellegr., p. 69. 

 Sc. 28-30 jf, 2-21 ; posterior barbel l'-lj 



diameters of eye ; width of mouth 3i-4 



times in length of head ; spine of dorsal 



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



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

 than eye ; width of mouth 3A-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. 



4 1 

 Sc. 28-29 jv, 2 ; posterior barbel as long as eye . 55. B. pagensteclien, J. (r. Fiscn. 



