GENERAL DESCRIPTION. 137 



this same fisli^ two water-colour sketches^ by Mr. Cabot, of 

 Boston, and one, a coloured lithograph, in Dr. Richardson's 

 "Fauna Boreali-Americana ;" and these three, I am certain 

 would be pronounced by nine persons out often, not accustomed 

 to observe structural differences, three different fish. Indeed, 

 I am informed by Professor Agassiz, that, by the French residents 

 on Lakes Huron and Superior, they are actually believed to be 

 three distinct fish, and are known by three different names, from 

 the localities in which they are found, viz. : — Trout of the rocky 

 shallows [Truite des Battures), Trout of the muddy shoals 

 {Truite de Greve), and Trout of the deep open waters [Truite 

 du Large). The first of these fish is represented in the 

 large plate, and the second in the cut, the third is thus 

 described in Dr. Richardson^s work named above : — " The 

 head, back and sides, have a dark greenish grey colour, 

 which, when examined closely, is resolved into small roundish 

 yellowish grey spots, on a bluish grey ground, which covers less 

 space than the spots ; the latter are most evident on the sides, 

 each of them including three or four scales. The uncovered 

 portion of each scale is roundish, and its convex centre, having 

 a greyish hue and silvery lustre, is surrounded by a dark border 

 of minute spots, which are deficient or less numerous on the 

 yellowish grey spots, and also on the bluish white belly. The 

 dorsal and caudal fins have the greenish grey tint of the back, 

 and the ventrals and anals are muddy orange ; this colour also 

 partially tinging the pectorals. The irides are bright honey 

 yellow with blue clouds." 



I will merely add to this, that in the coloured lithograph, 

 which is beautifully executed, the fish has a bright, clean, 



