292 CHAEACINID^, 



eye 3-| (young) to 6 times in length of head ; a narrow adipose lid in 

 front of and behind eye ; interorbital width 2^ to 2 J times in length of 

 head. Gill-rakers short, fine, closely set, about 50 on lower part of 

 anterior arch. Dorsal 17-20 (3-5 unbranched), originating behind 

 vertical of base of ventral and nearer caudal than end of snout ; anterior 

 branched rays more or less produced, often longer than head. Adipose 

 fin moderately large, its base ^ to -| its distance from dorsal. Anal 

 25-31 (3-4 unbranched); anterior rays forming a produced, pointed 

 lobe, measuring ^ to | length of head. Pectoral | to f length of 

 head, reaching, or nearly reaching, ventral. Caudal deeply forked, with 



Fig. 223. 





ig;^^ 



Citharinus citharus. 

 Lower Nile (F. N.). 



pointed lobes. Caudal peduncle as long as deep or slightly deeper than 

 long. Scales 77-90 ^^, 17-21 between lateral line and root of ventral. 

 Silvery, the back greenish or purplish grey ; pectoral white, other fins 

 grey, usually with some bright red on the ventral, the anal, and the lower 

 lobe of the caudal ; adipose fin sometimes edged with black ; young often 

 with dark longitudinal lines running between the series of scales 



Total length 480 millim. 



Lower Nile to Blue Nile and White Nile, Chad Basin, Senegal, 

 Gambia, N'ger. — Type in Paris Museum. 



