10 CYPEINID^. 



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. 

 Sc. 32-35 -^, 2^-3 ; spine of dorsal very 



strong, at least | length of head, usually 

 as long as head ; posterior barbal 1^2 

 diameters of eye in adult ; anal not reaching 



caudal 67. i?. harlerti, Gthr., p. 8L 



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

 strong, § length of head ; posterior barbel 

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

 ing caudal 16^. B. paytonii, Blgr , p. 82. 



5- 

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



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



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



Sc. 31-33 % 2-2i ; spine of dorsal strong, §-| 

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

 meters of eye ; anal reaching caudal . , . 70. B. riggenhacli'i., Gthr., p. 84. 



5^-6- 

 Sc. 30-33 41151, 2^-3 ; spine of dorsal rather 



feeble, ^-§ length of head ; posterior barbel 



|— 1 diameter of eye ; anal reaching caudal . 71. B. fritschii, Gthr., p. 85. 



2. Lower jaw with sharp edge ; spine of dorsal feeble, ^| length of head ; 



posterior barbel shorter than eye. 

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



Sc. 35-36 ^, 21 ; anal not reaching caudal . . 73. B. atlantiais, 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. 

 Sc. 42 ^i, 4, 14; lower lip continuous across chin, 



produced into a long triangular lobe . . .74. B. (/'ilchri.sti, Blgr., p. 88. 

 Sc. 33-36 -^r% 2|, 14-16 ; lower lip continuous 



across chin 75. B. howkeri, Blgr., p. 89. 



Sc. 34-37 ^^^, 2^, 16 ; lower lip not extending 



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



b. Dorsal orioinatincr in advance of ventral. 



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

 Sc. 34-38 %^^ 2^-3, 12-14; dorsal wirli D 

 branched rays ; lower lip not extending 



