THE DOBULE ROACH. 63 



exceeding a pound and a half, which is about the maximum 

 weight specified by Swedish naturalists. 



THE DOBULE ROACH. 



Cyprinus Dobula, "Linn, and Retzius, Fauna Suecica," 1761 and 1800. 



" Bloc h," part i, pi. 5. 



Nilss. Prod," p. 26. 



Leuciscus ... " Kroyer," vol. in. p. 463. 



Swedish naturalists of the present day, it should be 

 remarked, would seem to negative the existence of the 

 C. Dobula in Scandinavia as a distinct species. Ekstrom 

 considers it identical with the Chub (C. Cephalus, Linn.), 

 with which it must be admitted its characteristics in the 

 main agree ; and Nilsson, when speaking of it in his " Pro- 

 dromus," designates it the Dick-kopp, signifying thick-head, 

 the name by which the chub is known near Gothenburg. 

 Kroyer also doubts its existence as a separate species in the 

 peninsula. 



The fin-ray formula exhibits the distinctions observed 

 between the Dobule Roach and the Chub : 



D. P. V. A. 



Dobula ... 10 16 10 11 ; scales on the lateral line 45. 

 English chub . 9 15 8 9 ; scales, &c. } 45. 



