THE SALMON FAMILY. 337 



40 feet, according to the nature of the basin : a much 

 greater or much less depth is useless. This is a rather 

 important point, as thereupon it depends whether your bait 

 is ever seen by the fish you wish to catch *. 



The annexed figure represents a small example of this 

 species taken from one of the Irish loughs, in which the 

 spots will be observed to be more numerous than in the 

 adult fish. 



YOUNG OF GREAT LAKE TROUT. 



The Great Lake Trout is almost wholly confined to 

 lochs and deep extensive tracts of water, where it reigns in 

 solitary grandeur, seldom venturing far up or down the 

 streams, and never descending to the sea. It spawns in 

 September. 



Principal Characteristics of the Great Lake Trout. Length of head 

 compared to total length of head, body, and tail-fin about as 1 to 4 ; 

 depth of body less than length of head. (See also p. 314-15 for com- 

 parison with the Common and Lochleven Trout.) Teeth large, strong, 

 and numerous, arranged in six rows above and four below two of the 



* The food of the Lake Trout consists of small fish. These are not 

 to be found in any great depths of water, but on the contrary on the 

 sloping shores of the lake, up which, therefore, the Trout comes in 

 search of them, stopping short of the shallows. 



Q 



