TREATISE ON FLY-FISHING. 55 



Sir Wm. Jardine, in a paper on Salmonidee, has 

 described at considerable length, the variations 

 observable in the trout of some of the lakes of 

 Sutherlandshire. The fish in these lakes are 

 reddish, dark, or silvery, according to the 

 clearness of the water. 



Mr. Neil, in his tour, notices the black moss 

 trout of Loch Knitching, and Loch Katrine, is 

 said to abound also with small black trout ; an 

 effect considered to be produced in some waters 

 by receiving the drainage of boggy moors. In 

 streams that flow rapidly over gravelly or rocky 

 bottoms, the trout are remarkable for the bril- 

 liancy and beauty of their spots and colours. 

 Thus, in our immediate neighbourhood, we find 

 that the trout caught between Shaugh Bridge and 

 Plym Steps, on the river Cad, are generally very 

 dark, approaching in some instances almost to a 

 black ; whilst on the Tavy, below Denham Bridge, 

 ihey will be found of a light silvery hue ; so also 

 on the Yealm those taken below Lee Mill 



