170 BRITISH FRESHWATER FISHES 



2. Scales moderately large ; tubules of the 

 lateral line not extending to the free 

 edges of the scales. 



a. Free edge of anal fin convex ; 

 cleft of mouth nearly or 

 quite reaching to below 

 the anterior margin of 



eye 8. Chub 



/3. Free edge of anal fin concave. 

 Origin of dorsal fin above or 

 slightly behind base of 

 pelvic fins. 

 Greatest depth of the body contained 3 to 5 

 times in the length to the base of the caudal fin ; 

 dorsal fin with 7 or 8 branched rays . 9. Dace 

 Greatest depth of the body contained 2\ to 4 

 times in the length to the base of the caudal fin ; 

 dorsal fin with 9 to i i branched rays . 10. Roach 

 Origin of dorsal fin far be- 

 hind the base of the pelvic 

 fins . . . .11. Rudd 



III. Dorsal fin short or of moderate length; anal 

 fin long, with 15 to 29 branched rays; 

 abdomen behind the pelvic fins compressed 

 to a sharp edge over which the scales do 

 not pass. 

 A. Body deep. 



44 to 50 scales in the lateral line, 

 8 to I I between origin of dorsal fin 

 and lateral line ; dorsal fin usually with 

 8, anal fin with 19 to 24 branched 

 rays 12. White Bream 



