202 BRITISH FRESHWATER FISHES 



and a smaller fish of 8-J- inches, from the Cam at 

 Newport; the latter is shown on PL XXVII, 

 Fig. 2. 



These are in every way intermediate between the 

 parent forms ; the dorsal fin is rather more elevated 

 and has the free edge a little more concave than is 

 usual in the Rudd ; it is also placed farther forward 

 than in that species, but not so far forward as in the 

 Roach, its origin falling in or a little behind the 

 vertical through the tip of the pelvic axillary scale. 

 The mouth is terminal, but less oblique than in the 

 Rudd ; resemblances to the latter are shown in the 

 presence of an abdominal keel behind the pelvic fins 

 and in the pectination of the pharyngeal teeth, but 

 the number of the latter points unmistakably to the 

 Roach parentage, there being six on one side and 

 five on the other in the inner row, whilst the outer 

 row is represented by a single tooth, or in the 

 larger fish on one side by none. In both specimens 

 I count nine branched rays in the dorsal fin and 

 eleven in the anal, whilst the scales in the lateral 

 line number forty- two or forty-three. 



THE WHITE BREAM or SILVER BREAM (Blicca 

 bjoernka) has a deep and strongly compressed body, 

 with the abdomen behind the pelvic fins compressed 

 to an edge, dividing the scales of the two sides. 

 The snout is short and blunt, the mouth nearly 

 terminal, with the cleft slightly oblique. The eye 

 is rather large, its diameter never much less than 

 the length of the snout. The pharyngeal teeth are 

 in two series, five or six in the inner and two or 

 three in the outer on each side. 



The dorsal fin is rather elevated and pointed, and 



