HYBRID BREAM 



207 



In form this fish resembles a rather deep Roach, 

 the greatest depth of the body measuring one-third 

 to two-fifths of the length to the base of the caudal 

 fin. The snout is blunt and the mouth is nearly 

 terminal, with horizontal or slightly oblique cleft and 

 with the lower jaw a little shorter than the upper. 

 The dorsal fin is situated above the interspace 

 between the pelvic and anal fins, and the anal is 

 rather elongate, with fifteen to nineteen branched 

 rays. The abdominal keel between the pelvic and 

 anal fins is sometimes weak and covered with 

 angularly bent scales, sometimes sharper, with a 

 naked line separating the scales of the two sides. 

 The scales number forty-seven to fifty-two in the 

 lateral line, nine to eleven in a transverse series from 

 the origin of the dorsal fin to the lateral line, five or 

 six between the lateral line and the base of the 

 pelvic fin. 



The numerical characters of the parent species 

 and of the hybrid may be tabulated as follows : — 



The hybrid between the White Bream and the 

 Roach is known from Holland, Belgium, and 

 Germany, but not from England. One from 



