of fy* ;@almrm. 



GUNTHEK demonstrates not only how 

 fishes can gradually accommodate them- 

 selves to either salt or fresh water, but 

 that there are some species which seem quite in- 

 different to a rapid change from one to the other. 

 Individuals of the same species may be found at 

 some distance out at sea, while others live in rivers 

 beyond the influence of the tide, or even in inland 

 fresh waters that are practically land-locked. This 

 postulate covers the case of the fresh-water variety 

 of Atlantic salmon known as solar, var. sebago, 

 which, in all respects save the habit of anadromy, it 

 so nearly resembles. The analogy becomes es- 

 pecially noticeable when the fact is substantiated 

 that the sea salmon subsist largely on caplin and the 



