460 TUBE-BLADDERED GROUP. 



series of pharyngeal teeth. This fish has a somewhat wider distribution than the 

 last, extending southwards into Italy and eastwards into Asia ; it is uniformly 

 coloured, with greyish margins to the scales. To the same group of the genus 

 belongs the dace (L. vulgaris), with the same distribution as the roach, to which it 

 presents a considerable external resemblance, although smaller and longer in form ; 



GROUP OF WHITE-FISH. 



Ide, Rudd, Roach, and Chub (£ nat size). 



its sides being silvery, but the fins not tinged with red. Roach and dace are 

 commonly found in company, and have identical habits. The fish shown in the 

 upper figure of our illustration is confined to the central and northern countries of 

 the Continent, where ib is known as the ide (L. idus), and is a uniformly-coloured 

 species nearly allied to the last. It is of special interest on account of a golden- 

 coloured domesticated variety bred in Germany, and known as the orfe. Another 



