146 SALMONIDES. 



them of all sizes, in April, in the market, at Lay- 

 bach, from six inches, to two feet long ; but they 

 are much larger, and reach thirty or forty 

 pounds. 



" It is the opinion of some naturalists, that it is 

 only afresh water fish, yet this I doubt, because 

 it is never found beyond certain falls — as in the 

 Traun, the Drave and the Save ; and there can be 

 no doubt it comes into these rivers from the Dan- 

 ube ; and probably, in its largest state, is a fish of 

 the Black Sea. 



"Yet, it can winter in fresh water, and does not 

 seem, like the salmon, obliged to haunt the sea, 

 but falls back into the warmer waters of the great 

 rivers, from which it migrates in spring, to seek a 

 cooler temperature and to breed. The fishermen 

 at Gratz, say they spawn in the Mur, between 

 March and May. In those I have caught at Lay- 

 bach, which, however, were small ones, the ova 

 were not sufficiently developed to admit of their 

 spawning in spring.'' 



We think there cannot remain a shadow of 

 doubt, after comparing these notes, with the great 

 trout of the cold ponds in Maine and New Hamp- 

 shire, as well as with the degenerated representa- 

 tive of the family in the rivers and ponds of Mas- 

 sachusetts, that they approximate the true hucho 

 of the Danube. It is very certain, too, that by be- 



