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 cambricus] and the salmon- 

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

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

 Gunther, who omits the bull-trout (S. eriox] from his list, 

 recognises two other migratory 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 incline to follow Dr. Day in considering no more 

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

 Galway sea-trout (Salmo gallwensis\ 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 Ib. 



