FISHES. 123 



177. Carassius vulgaris Nilss. Crucian Carp. 



This species and its variety, C. gibelio BL, or Prussian 

 Carp, have been introduced into numerous ponds. 



178. Carassius auratus (Z.). Gold Carp. 

 Introduced into ponds and reservoirs. 



179. Barbus vulgaris Flem. Barbel. 



Freshwater resident, locally distributed in the rivers of the 

 central plain, except the Derwent and the polluted waters 

 of the Aire, Calder, Dearne, and Don. 



180. Gobio fluviatilis Flem. Gudgeon. 



Freshwater resident, common and generally distributed in 

 rivers and ponds. 



Sub-fam. LEUCISCINA. 



i8r. Leuciscus rutilus (Z.). Roach. 



Freshwater resident, abundant and generally distributed, 

 except in the North-western Fell district and the polluted 

 rivers, from which it is absent. Has been introduced into 

 canals, reservoirs, and ponds. 



182. Leuciscus cephalus (Z.). Chub. 



Freshwater resident, abundant and generally distributed. 

 Absent from the rivers of the north-west, and from the 

 polluted portions of those of the manufacturing districts. 



183. Leuciscus vulgaris Flem. Dace. 



Freshwater resident, generally distributed and common, being 

 absent only from polluted rivers and hill-streams. 



184. Leuciscus erythrophthalmus (Z.). Rudd. 



Freshwater resident, abundant in Holderness, where it occurs 

 in ponds. Reported as in Lake Semerwater, and ponds 

 in other parts of the county, and also in the Codbeck. A 

 few have been caught in the Ouse at York. 



