CLASS PISCES. 417 



flanks sown with little spots of a crescent-shape on a 

 silvery ground. Its flesh is yellow : a considerable 

 quantity of it is imported among us in summer. 



Salmo hucho, L., Bloch 100, and better, Meidinger 

 45, which becomes almost as large as the salmon, 

 differs little from the preceding in its spots, but has the 

 muzzle more pointed, and the teeth much stronger. 



As for the other river trouts, they are to be found 

 in all limpid waters, especially in mountain streams. 

 They differ much in size and colour, and several 

 naturalists have thought that they could distinguish 

 certain species among them, while others maintain 

 that they are simple varieties, the result of age, 

 nutriment, and particularly of the character of the 

 waters in which they sojourn. But I find that this 

 supposition has been carried beyond the bounds of 

 probability. 



Salmo Lemanus, Cuv. (great trout of the Lake of 

 Geneva), which is also found in some neighbouring 

 lakes, with the head and back sown with some small 

 round and blackish spots, on a whitish ground. Its 

 flesh is very white. There are some of forty and 

 fifty pounds weight. 



Salmo triitta, L., Bl. 21, (salmon-trout), is marked 

 with ocellated spots, or in the form of an X, and the 

 upper ones are sometimes surrounded with a closer 

 circle ; there are many of these spots on the opercula 

 and the adipose dorsal ; the flesh is reddish. The 

 streams of clear waters, which disembogue imme- 

 diately into the sea, are the waters in which the best 



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