SALMON TRIBE. 



5 QI 



the rivers in autumn to spawn. Jardine writes that " in approaching the entrance 



of rivers, or in seeking out, as it were, some one they preferred, shoals of this fish 



may be seen coasting the bays and headlands, leaping and sporting in great 



numbers, from 1 to 3 or 4 lbs. in weight ; and in some of the smaller bays the 



shoals can be traced several times circling it, and apparently feeding." On the 



other hand, the Continental May-trout spends the colder months in the deepest 



waters of the mountain-lakes, only coming to the surface in May. During the 



summer these trout may be seen swimming round the shoals of small fishes on 



which they prey until they get them well together, when the}^ make a sudden rush 



among them. 



Much the same difference of opinion as obtains with regard 

 Charr 



to the number of species of trout exists in the case of charr, 



riKAYi.iN'r. and CHARR (} t nat. size). 



Dr. Giinther recognising five British lacustrine species, which he regards as distinct 

 from 8. umbla of the Swiss lakes: while Day includes the whole of these under 

 the latter, which is also taken to embrace the ssebling (S. salvelinus) of the 

 mountain-lakes of Bavaria and Austria, as well as the migratory northern charr 

 (S. alpinus), ranging from Lapland and Scandinavia to Iceland and the northern 

 parts of Scotland. All charr differ from salmon and trout in having the teeth at 

 all ages confined to the head of the vomer, instead of being distributed over its 

 whole length; and all the forms mentioned above, which have a very uniform 



