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indeed, probable, that more than one species 

 of river trout may exist in this country ; but 

 when we consider geologically the various 

 strata traversed by rivers in their course, the 

 effect these variations of. soil must produce 

 upon the water, and the influence which the 

 constant operation of the water is likely to 

 produce upon the fish that inhabit it when 

 we reflect also on the great variety and quality 

 of the food afforded by different rivers, depend- 

 ing also on soil and situation and the addi- 

 tional effect which these combined causes, in 

 their various degrees, are likely to produce 

 we shall not be much surprised at the varia- 

 tions, both in size and colour, which are found 

 to occur. That two trout of very different 

 appearance and quality should be found within 

 a limited locality in the same lake or river, is 

 not so easily explained; and close examination 

 of the various parts which afford the most per- 

 manent characters should be resorted to, with 

 a view to determine whether the subject ought 

 to be considered only as a variety, or entitled 



former of which ranks highest in estimation ; but the more 

 generally received and most probable opinion is, that this 

 difference arises from the quality of the food, or from the 

 water which they inhabit being impregnated with some 

 substance capable of producing this effect. Certain it is, 

 that their haunts, voracity, and modes of feeding, are 

 every where alike." Bainbridge. 



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