52 DOBULE. 



of its food and breeding. He says that it frequents tlie clearer 

 waters of the lakes and streams of that river, where there is 

 a bottom of stones or gravel; and it feeds on worms and 

 vegetables. The roe is of a greenish tinge, and is shed copiously 

 in April and May. The flesh is white, soft, and full of the 

 small bones common to this class of fishes. 



The Dobule is sti'ictly a fish of the north of Europe; and 

 Nilsson says it is in Sweden confined to the streams and lakes 

 in the middle and north of the province of Wermerland; and 

 that it should travel to Britain is not the least remarkable portion 

 of its history. 



Mr. Yarrell himself took this example while engaged on the 

 Thames in fishing for Whitebait with a net; and as it is not 

 unlikely it may occur again, perhaps with some difference of 

 appearance as regards age and growth, to enable observers to 

 be certain of the species, we give descriptions as they are con- 

 tained in the works of the writers we have mentioned; as also 

 that of Mr. Yarrell in the fourteenth volume of the Linnean 

 Transactions, to which are added some notes obtained from 

 examination of what we have believed to be sjjecimens of the 

 same procured from the continent; but the latter are produced 

 with the expression of some doubt. It is proper to add that 

 the reviewer of Mr. Yarrell's work, in the first volume of the 

 "Magazine of Zoology and Botany," on the authority of Dr. 

 Parnell, informs us that this fish has also been caught in the 

 Cumberland rivers; but no further particulars are given. 



Nilsson describes this fish as measuring seven or eight inches, 

 which answers to the length of the figure given by Ekstrom. 

 The form lengthened, the height and length of the head one 

 fifth of that of the body to the middle of the tail fin; the 

 outline little arched, and not much compressed at the side. 

 Nose prominent and blunt; mouth small. Lateral line a little 

 bent, with about fifty mucous spores. Number of scales across 

 the middle of the body twelve; the lateral line on the eighth 

 scale. Anal fin with eleven rays, of which eight are branched. 

 The colour brown above, silvery on the sides, white below. 

 Dorsal fin the colour of the back; lower fins white, with a 

 tinge of red, and sometimes all red. 



The description of Dr. Rcisinger is, that it measures eleven 

 or twelve inches, with a weight from one to two pounds; the 



