]0S INTRODUCTION. 



The second class, to which we now proceed, 

 namely, those fish which live partly in fresh water 

 and partly in salt, is still more important, and in- 

 volves the interesting inquiry, how far those natu- 

 rally migratory fish may be made to abandon their 

 habits, and, without detriment, become the denizens 

 of fresh water alone. As to the Basse, Lahrax 

 lupiu^ which belongs to this category, the experi- 

 ment is said to have been completely successful : in 

 Mr. Yarrell's words, " They have been retained with 

 success in Mr. Arnold's fresh-water lake in Guern- 

 sey, and Dr. MCulloch has vouched for the supe- 

 liority of flavour obtained by the change," (i. 9). — 

 "We shall farther illustrate the question by a refer- 

 ence to the family of the Salmonidae, and shall 

 make a few remarks upon the Sea- trout, Salmon, 

 and Smelt, three species held in the highest estima- 

 tion. 



With respect to the Sea or Salmon-trout, also the 

 Whitling, the White-trout of Ireland, the Phinock 

 of the North of Scotland, Sal/no truttay second in 

 value only to the true Salmon, Dr. M'Culloch 

 stated, nearly twenty years ago, that it was then a 

 permanent resident in a fresh-water lake in the 

 island of Lismore, and without the power of leav- 

 ing it, and reaching the sea. There it has been 

 known for a long course of years, perfectly recon- 

 ciled to its prison, and propagating without any 

 apparent difficulty It will not be superfluous to 

 corroborate this important fact by a second distinct 

 example, which we take from the interesting pages 



