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tinguislied from one another by any scientific process at 

 present known ; or 2n(l. — Salmon trout dL'tainud lumaturally 

 in fresh water have spawned, and [produced a true sahnon ; 

 or 3rd. — We have accidentally, without our own knowledge, 

 detained true salmon in fresh water, which, contrary to all 

 former experience, have thriven and bred. Of these conclu- 

 sions, the first seems the best, as it is borne out by the fur- 

 ther progress of the experiment. One of the eleven parent 

 fish was lately accidentally killed, and has been preserved. It 

 is most certainly a salmon trout, and a beautiful specimen, 

 exhibiting none of the deformity which is always apparent 

 in these specimens of true salmon (S. Salar), which have 

 been detained from sea for more than four years. A large 

 number of the brethren of the parr, described by Dr. Giinther, 

 assumed the smolt dress in October last, and exhibited the 

 usual restlessness, travelling round the pond seeking an 

 outlet to get to sea, and one which jumped out and died 

 on the bank is now before you. As time passed on these 

 smolts did not (as true salmon smolts invariably do) revert 

 to the parr markings, but grew apace, and assumed all the 

 appearance and markings of the parent fish so completely 

 as to leave not a shadow of doubt as to their species. Two 

 beautiful samples are now on the table. Surely proof could not 

 be stronger that the salmon trout can be detained in 

 fresh water and reared in myriads with certainty. The 

 parent fish, the smolt, and one of the young ones which has 

 passed the smolt stage, will be sent to the Zoological Society 

 by next mail, and will form one of the most interesting and 

 practically useful exhibitions of pisciculture that the world has 

 ever seen. 



