Cypj'inidae 



29 



and Siberia ; in England it is common in the eastern counties, 

 but is local elsewhere ; it is absent from Scotland, but is abundant 

 in Ireland. It is especially a fish of lakes, ponds and slow-running 



Fig. 21.— Rudd. 



rivers. A length of 18 inches and a weight of 3| lbs. may be 

 reached. A Eudd of about 2| lbs. is exhibited ; it is from Norfolk, 

 and was presented by J. G. Buxton, Esq. 



48. Hybrid Roach and Rudd, Rutilus riitilus x Scardinius 

 erythrophthahmis. — This hybrid is probably not uncommon in 

 most localities inhabited by the parent species, but may generally 

 be mistaken for one or the other of them. It is in every way 

 intermediate between the parents, and this may particularly be 

 noted in regard to the position, size and form of the dorsal fin. 

 The very fine specimen shown, weighing 3 lbs., was taken from 

 a pond near Doncaster in August, 1915, by the donor, W. E. 

 Park, Esq. 



49. Silver Bream or White Bream, Blicca bjoerkna. — 

 This species has a deep, strongly compressed body, a long anal 

 fin, of 2 or 3 simple and 19 to 24 branched rays, and rather 

 large scales, there being 8 to 11 in a transverse series from dorsal 

 fin to lateral line ; the coloration is silvery white, with greyish 

 fins. The Silver Bream ranges throughout Eiu-ope north of the 

 Pyrenees and the Alps into Western Siberia. In this country it 

 is found in east coast streams from Yorkshire to Suffolk, occurring 

 only in slow-running rivers or in lakes. It attains a length of 

 about 12 inches and a weight of 1\ lbs. The example shown is 

 from the Cam. 



