12 CTPEINIDiE. 



2. Lower jaw projecting beyond snout. 

 Sc. 32-35 jUi. 21, 12 90. B. progemjs, Blgr., p. 102. 



II. Exposed surface o£ scales with radiating canals (see fig. 1, p. 2, B, C), 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 rays, anal with 5, rarely 6 t- 



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. 



5— fi- . * 



Sc. 30-35 (rarely 30) -^HS 3—4 ; dorsal with 8 



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



longer than head 91. B. trimaculatus, Peters, 



5— -6— 

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



its spine not longer than head 02. B. nummifer, Blgr., p. 105. 



6- 

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



its spine a little longer than head .... 93. B. jacisonii, Gthr., p. 106. 



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

 Sc. 37 gf, 3| 94. B.pappenheunl, Blgr., p. 107. 



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 origiu of dorsal and lateral 

 line. 

 a. Base of ventral entirely below dorsal. 



Si_1 OA 



Sc. 48-51 ft=g, 5|-7, 20-22 ; last simple ray 

 of dorsal very strong, strongly serrated, 

 serrated part |~§- length of head ; inter- 

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



Sc. 40-47 |f|j, 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 . 96. B. callensis, C. & V., p. 109. 



Sc. 40-45 5H| 4-5, 18-20 ; last simple ray of 

 dorsal moderately strong, more or less 

 strongly serrated, serrated part \—\ length 



of bead ; interorbital width 2^-3 times in [p. 110. 



length of head 97. B. setivimensis, C. & V., 



* In the former (B. 1 of this synopsis), as in B.fluviatilis, the vertebras number 40 to 

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

 f In B. capensis, p. 14. 

 % Except in aberrant specimens of B. holotcenia, p. 16. 



