51 



DOBULE. 



"^ 



Gresling, of the Germans, which Artedi supposes to be the 



same with the Gudgeon. 



G^-tslagine, Willoughby; p. 263, pi. Q. 1. 



Cyprinus Dohula and G. Grislagine, Linn.^us. 



Bloch; pi. 5. 

 Bolide Boach, Yarrell; Br. Fishes, vol. i, p. 397. 



Leuciscus Dohula, Ctjviek.. 



Cyprinus Dohula, Jenyns; Manual, p. 409. 



The Dobule is so rare with us as to have been taken only 

 once in Britain. We must, therefore, seek for its history, so 

 far as it is known, from the continent of Europe; from whence 

 it is fortunate that we are able to communicate some information 

 not generally known among ourselves, but by which we may 

 disentangle the confusion respecting it which has hitherto prevailed 

 among naturalists. Artedi was the first to confound together 

 two supposed species, which, according to the evidence of later 

 authorities, are distinguished only by difference of age, or that 

 small variation which is marked by a slight change in the 

 number of rays in the fins; and in this he is followed by his 

 friend Linnaeus; who makes it the distinction between the 

 Cijprinus Dohula and C. Grislagine, that the former is marked 

 by ten of these rays in the dorsal and anal, while there are 

 eleven in the C. Grislagine ; although in the latter also Artedi 

 assigns to the dorsal ten only. 



We owe the correction of this mistake in the first place to 

 Nilsson; who informs us that the example described by Mr. 

 Yarrell under the name of Dobule Roach, and which is the 

 Cyprinus Dohula of Bloch, was the early stage of the Cyprinus 

 Grislagine of Linnaeus; and this is also confirmed by Dr. 

 Reisinger, in his Ichthyology of Hungary, who finds it in the 

 Danube; and from him we copy the particulars which he gives 



