SALMO HUCHO. 233 



tions, by the predatory habits of his ances- 

 tors. 



HAL. How far the principle of change 

 of character and transmission of such cha- 

 racter to the offspring will apply, I shall 

 not attempt to determine, and whether all 

 the varieties of the salmo with teeth in their 

 mouth may not have been produced from 

 one original; yet this fish is now as distinct 

 from the trout as the char or the umbla; 

 and in Europe, it exists only below great 

 falls in rivers connected with the Danube, 

 and is never found in rivers of the same dis- 

 tricts connected with the Rhine, Elbe, or 

 which empty themselves into the Mediterra- 

 nean; though trout are common in all these 

 streams, and salmon and sea trout in those 

 connected with the ocean. According to 

 the descriptions of Pallas, it occurs in the 

 rivers of Siberia, and probably exists in those 

 that run into the Caspian; and it is remark- 

 able, that it is not found where the eel is 

 usual at least this applies to all the tribu- 

 tary streams of the Danube, and, it is said, 



