THE SALMON-TROUT 257 



glimmering, solitary landscape and the cool breath of the 

 stream — all these enhance the excitement of catching lovely 

 fish, which to angle for in broad day, under existing conditions 

 of weather and water, would be a pastime only for lunatics. 



In additon to the sewin {Salmo camhricus) and the salmon- 

 trout (6". trutta), which I have ventured to regard respectively 

 as southern and northern variants of the same species. Dr. 

 Giinther, who omits the bull-trout (^S*. eriox) from his list, 

 recognises two other migratorv species in British waters — 

 namely, the grey trout {Salmo brachypoma)^ which he describes 

 as frequenting the Forth, the Tweed, and the Ouse, but 

 which I inchne to follow Dr. Day in considering no more 

 than an adolescent or grilse form of Salmo trutta ; and the 

 Galway sea-trout {Salmo gallivensis)^ which is neither more 

 nor less, I believe, than a river trout {Salmo fario) with saline 

 propensities, causing it to seek food in the estuaries, without 

 going out to sea like the regular sea-trout. I am not 

 acquainted with the so-called Galway sea-trout, but am very 

 familiar with what I take to be a similar fish in Scottish 

 streams. This is obviously the common brook-trout, which, 

 descending below tide-mark, often when its native burn has 

 no estuary, but brawls over shingle and sand into the sea, 

 acquires a silvery jacket, but retains some of the spots of the 

 inland race. In large estuaries these river-trout attain a very 

 great size. One was taken in the Tay on June 25th, 1902, 

 weighing 17 lb. 



17 



