. British and Irish Salmonidæ. hcd and insipid* Teign or Dart fish,but alterations as considerable in the value of the flesh of the northern whitlingand other local races of sea trout have been observed. While we find as greatvariations in our brook trout, in accordance with the character of the watcis theyinhal:)it and the amount or quality of food they are able to obtain. But, differingas these races do among themselves, whether in size, colour, or even in somestructural points, the offspring, if placed in suitable surroundings, may improve,while, on the other hand, the finest breeds will de
. British and Irish Salmonidæ. hcd and insipid* Teign or Dart fish,but alterations as considerable in the value of the flesh of the northern whitlingand other local races of sea trout have been observed. While we find as greatvariations in our brook trout, in accordance with the character of the watcis theyinhal:)it and the amount or quality of food they are able to obtain. But, differingas these races do among themselves, whether in size, colour, or even in somestructural points, the offspring, if placed in suitable surroundings, may improve,while, on the other hand, the finest breeds will deteriorate in unsuitable , however, any temporary cause, as mine-water in Devonshire rivers, {seepp. 55 ante,) have injured the local race of fish, and this cause has been removed,it perhaps becomes worthy of consideration whether it might not bo advisable toolitain the progeny of a finer lii-eed fi-om elsewhere and introduce them into thewater, instead of waiting for the improvement of the local deteriorated Fig. 40. Heail, natural sine, of female Truif,82 iuchfs long, from the Dart. the Erme, salmon are never seen above the tidal water, ami very few even there. If the abovefisli were young salmon, why should they never appear as full-grown salmon in the upper partsof tlie river ? On the Avon, on the other hand, where salmon have very much increased for thelast fifteen or twenty years, the peal and truff are much fewer in number, and the white-fish ofthe same kind as those in the Erme are now seldom seen, although the river is at all timesswarming with the samlets, which are the unmistakable salmon fry. I have not the smallestdoubt that the white-fish, peal, and truff of the river Erme are all the same fish in differentstages of growth (G. C. G., FieliU February 14th, ). Couch considered the white-fish to bethe early growth of the peal, and believed the Welsh sewin and the blue poll S. alhns to bedistinct and separate species. Old Log, Field, February
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