344 DOMESTICATED TROUT. 



and the different kinds of whitefish. Single specimens 

 sent from different localities — and the more such are 

 sent the better — will settle the question of the distribu- 

 tion of each species ; but you see that it will never do to 

 attempt identifying the species from specimens gathered 

 at random in different localities ; that study must be made 

 from specimens collected in the same region, indepen- 

 dently of the study of the distribution of species. And 

 now that you know my plans, I leave the matter in your 

 hands. 



Very truly yours, 



L. AGASSIZ. 

 Livingston Stone, Esq. 



