12 CYPKINID^. 



2. Lower jaw projecting beyond .snout. 

 Sc. 32-35 z^..2i, 12 90. B. progeny,, B\av., p. 102. 



II. .Exposed surface of scales with radiating canals (see fig. 1, p. 2, B, ('), which, 

 as a rule, are very numerous in the species with small scales, and less 

 numerous, or even restricted to a few, in those with large scales * ; dorsal 

 fin with 6 to 8 (rarely 9) branched ravs, anal with 5, rarely 6 f- 



A. Last simple dorsal ray enlarged, bony, forming a strong spine which is 



not serrated behind ; two barbels on each side. 



1. Depth of body 3-4 times in total length ; snout not longer than eye. 



Sc. 30-35 (rarely 36) ^, 3-4 ; dorsal with 8 



(very rarely 7) branched rays, its spine not [p. 103. 



longer than head 91. B. trimaculatns, Peters, 



Sc. 36-39 ^t^, 4 ; dorsal with 8 branched rays, 



its spine not longer than head 92. B. nummifer, BIgr., p. 105. 



Sc. 36-37 |f , 3^4 ; dorsal with 7 branched rays, 



its spine a little longer than head . . . . 93. ^. jaekson'ii, Gthr. p. 106. 



2. Depth of body 4| times in total length ; snout a little longer than eye. 

 Sc. 37 3, 3^ 9i. B.pappenheimi,B\gr.,p.l07. 



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



third, and serrated behind t ; two barbels on each side. 

 1. 40-51 scales in lateral line, 7^-10| between origin of dorsal and lateral 

 line. 

 a. Base of ventral entirely below dorsal. 



Sc. 48-51 |t^!, 51-7, 20-22 ; last simple ray 

 of dorsal very strong, strongly serrated, 

 serrated part ^| length of head ; inter- 

 orbital width 2|-3 times in length of head . 95. B. hiscannsis, Blgr., p. 108. 



Sc. 40-47 mi, 4-5, 18-20 ; last simple ray 

 of dorsal very strong, strongly serrated, 

 serrated part |-| length of head ; inter- 

 orbital width 2§-3 times in length of head . 9C). B. callensis, C. & V., p. 109. 



Sc. 40-45 ^1^, 4-5, 18-20 ; last simple ray of 

 dorsal moderately strong, more or less 

 f^trongly serrated, serrated part |-^ length 



of head; interorbital width 2^-3 times in [p. HO. 



length of head 91. B. setiviinensh, C. & V., 



* In the former (B. 1 of this synopsis), as in B. fiuvialUis, tlie vertebroR mimber 40 to 

 49 (22-28 + 17-21) ; in the latter they number only 33 to 38 (17-21-1-13-18). 

 t In B. capensis, p. 14. 

 t Except iu aberrant specimens of B. holotivnin, p. 10. 



