138 SALMONlDyE. 



silvery appearance, with a prevalence of bluish grey hue, and a 

 silvery belly, precisely in accordance with a description given 

 to me by Professor Agassiz, of the Truite du Large, for in this 

 condition I have never myself seen the fish. 



In the drawings by Cabot, from which the wood-cuts to this 

 paper are taken, and the correctness of which I had an oppor- 

 tunity of verifying, by personal inspection, during a recent 

 visit to the upper lakes, the Truite des Battures (large plate) 

 is of a dark bluish green on the back, fading into a greenish 

 brown about the lateral line, thence into a greenish yellow on 

 the sides, and into bluish silver on the belly, the whole largely 

 marked with distinct irregularly-shaped spots, light green 

 on the dark back, yellowish on the brown green of the sides, 

 and silver on the bluish belly, becoming larger as they descend 

 from the back, and at last melting into the brightness of the 

 abdomen. The dorsal and caudal fins of the same colour as the 

 back, with irregular yellowish green spots, the latter faintly 

 margined with dull red; the pectorals bluish grey, margined 

 with the same colour, and the ventrals and anals broadly mar- 

 gined with dusky vermilion. The third variety, the Truite de 

 Greve, is generally of a muddy greenish brown, darker and 

 greener on the back, browner on the sides, and yellowish grey 

 on the belly. The spots in this variety are much smaller than 

 in that last described, and far less definite both in shape and 

 colour, so that the fish might be said to be mottled or clouded, 

 rather than spotted. The fins are all of the same dull, dingy, 

 olivaceous colour, similarly clouded, with the faintest possible 

 indication of a ruddy margin on the pectorals, ventrals, and 

 anals, but no tinge of that colour on the caudal fin. Both 



