A STUDY ON TROUT AND YOUNG SALMON. 



dish authors have disposed, we have not been able to find more 

 than about ^/2 dozen specimens of young salmon, above the 

 emigration stage. Most of them belong even to the lowest of 

 the sizes desireable, and they are all taken from a watercourse 

 inhabited by the Vener-Salmon. Direct examination has 

 shown them to possess the peculiarities ot this form. In the 

 works of all the swedish authors we have further not been able 

 to find one single drawing of one single young salmon of the 

 missing sizes not beeing taken from the obove mentioned water- 

 complex or expressly stated to be „Vener or Vetter-Salmon". 

 In my oppinion we are therefor justified in drawing the con- 

 clusion, that the descriptions of swedish authors of youg 

 salmon between the emigration and the grilse stage are founded 

 on the relict or landlocked form of middle Sweden and 

 consequently are of no value for the distinction of oceanic 

 salmon. 



Even supposing that some authors like f. ex. Nilsson or 

 Jardine have had a real young salmon of the abovementined 

 sizes for examination, a possibility wich I will not deny, the 

 walue of such a single and imperfect diagnosis must obviously 

 disappear when, during the preparation of later descriptions, it 

 is confused with descriptions of a material possessing quite 

 other characters. 



My working hypothesis has thus proved to be correct. 



Salmon between the emigration stage and the grisle stage 

 are not properly described and consequently must be considered 

 as unknown. 



At this juncture I must allow myself the pleasure of ex- 

 pressing my acnowledgement of the works of msrs. Smitt and 

 Widegren, wich undoubtedly are executed with great care and 

 conscientiousness and in a manner, wich even now, after the 

 lapse of more than 30 years, enables present investigation 

 largely to control their results by examination of the original 

 specimens. The excellent manner in wich they have effected 



