\ MMKTIK.S <>F COI.oI'K. I I .') 



of the head and <;ill-ct>vt'rs, the form of the fms and tlic niuidxM' 

 of the tin-rays, thinjrs not cxaniin(Ml l)y the supcrticial ol)scrv('r, 

 tlicy wonhl pass for different fisli. These three varieties arc 

 known as the Triiitf de Grerf, Triiite dfs Jialtures, and Truite 

 (In iMi'fif : or, Trout of tlie nuuhly hottom, Trout of the roeky 

 shores, and Trout of tlic open waters ; the tir>t hciui: a dull 

 niu<l-coIour('d tisji, the scroud bright niid liiindsonuly mottled, 

 and the last hluish and silvery, and reseiul)liuLr niore a elean-iuu 

 Salmon than a Lake Trout. 



This is so faiily a ease in point, that I cannot resist qnotinfj 

 it here, as it is pcrfeetly evident that there is no real distinction 

 whatever; and if this be so of one variety or species, there is no 

 reason for douhtinj; that like causes will produce like eflfcets, in 

 the conjrcnerous species. A^rain, it is not only possible, but in 

 the hifi^hest deforce probable, that the difl'erent cheniical std)- 

 stances which are held in solution by the waters of various 

 streams and lakes may not be without their iidlucnce on the 

 the colouring of their inhabitants. I think 1 have myself 

 observed, both on this continent and in llnrope, that the 'front 

 in streams flowin;_' froui lime-stone formations are more lus- 

 trous, and more strongly spotted than those of duller an<l less 

 lively waters. 



That the fish of streams ruslnng rapidly over pebl)ly beds 

 arc suiK'rior in all respects, Ixith of appearance and quality, to 

 those of ponds or semi-stagnant brooks, is confessedly noto- 

 rious ; but this may ari.Hc not so much from any particular 

 com|>oncnts of the wnters them.Hclves, as from the fact that 

 rapidlv moving an<l falling water is more highly aerated, the 

 atnuxsphcre lieing more freely intermingled with it, and there- 



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