10 CTPEINID^. 



B. Last simple dorsal ray more or less enlarged, ossified at least in its basal 

 half, forming a more or less strong spine; anal with 6 (rarely 7) 

 branched rays. 



1. Lower jaw with rounded or blunt edge. 



5^-6- 

 Sc. 32-35 -Tpr*, 2£- 3; spine of dorsal very 



strong, at least § length of head, usually 



as long as head ; posterior barbel 1^—2 



diameters of eye in adult ; anal not reaching 



caudal 67. B. harterti, Gthr., p. 81. 



51 r 



Sc. 32-35 jT-^i, 2^—3; spine of dorsal moderately 



strong, | length of head ; posterior barbel 

 |-| diameter of eye ; anal not quite reach- 

 ing caudal 68. B. paytonii, Blgr., p. 82. 



Sc. 31-35 p, 2-2^ ; spine of dorsal very strong, 

 §-| length of head ; posterior barbel f-1 



diameter of eye ; anal reaching caudal . . 69. B. rothschildi, Gthr., p. 83. 

 53. 

 Sc. 31-33 |j, 2-2£ ; spine of dorsal strong, |-| 



length of head ; posterior barbel 1-1£ dia- 

 meters of eye ; anal reaching caudal . . .70. B. riggenbachi, Gthr., p. 84. 

 Sc. 30-33 4x153, 2^-3 ; spine of dorsal rather 

 feeble, ^-§ length of head ; posterior barbel 



f-1 diameter of eye ; anal reaching caudal. 71. B. fritsc/tii, Gthr., p. 85. 

 2. Lower jaw with sharp edge ; spine of dorsal feeble, £-f length of head ; 



posterior barbel shorter than eye. 

 gi 

 Sc. 32-35 g|, 2^-3 ; anal reaching caudal . . 72. B. waldoi, Blgr., p. 86. 



51 

 Sc. 35-36 gf, 2| ; anal not reaching caudal . . 73. B. atlanticus, Blgr., p. 87. 



C. Last simple ray of dorsal not enlarged, or segmented down to its basal 

 third ; anal with 5 branched rays. 

 1. Snout projecting more or less beyond mouth. 



a. Dorsal originating above ventral ; posterior barbel as long as eye, or 



slightly longer or shorter. 

 So. 42 =f, 4, 14; lower lip continuous across chin, 



produced into a long triangular lobe . . .74. B. gllcJiristi, Blgr., p. 88. 

 Sc. 33-36 -ipr> 2£, 14-16 ; lower lip continuous 



across chin 75. B. bowkeri, Bier., p 89. 



Sc. 34-37 -tjt- 2 , 2\, 1 6 ; lower lip not extending 



across chin ; lower jaw with a sharp edge . 76. B. aureus, Cope, p. CO. 



b. Dorsal originating in advance of ventral. 



a. Posterior barbel as long as eye or slightly longer. 

 Sc. 34-38 *£*, 21-3, 12-14 ; dorsal with 9 

 branched rays ; lower lip not extending 



