THE SALMON FAMILY. 411 



some time between the end of October and January, in 

 consequence of which want of uniformity local boards, 

 vested with the necessary f)Owers, exercise considerable 



ingenuity in modifying the fence-months to suit the re- 

 quirements of each river, with more or less success. 



The following varieties probably connect >S'. salar and 

 S. fario : — 



^Gillaroo of many Irish loughs and the Shannon, recog- 

 nised by the muscular thickness of the stomach. 



\S. argenteus. — One of the rarest sea-trouts of our coast, 

 having an extra ray in the dorsal and ventral fins. 



^S. nigripinnis. — A small lake-trout, found in parts of 

 Wales and Ireland (Lough Melvin). 

 , t/S'. gallivensis. — A Gal way sea-trout. 



^ Lochlevai Trout. — Occurring in several Scottish lochs, 

 also in Windermere and other English lakes. 



\Orhiey Trout, of which there are two races, 



\Grey Trout. — A migratory species of the Forth, Trent, 

 and Ouse. 



Great Lake -Trout of Derwentwater and some other 

 British and Irish lakes. 



The Sea-Trout is found in various 23arts of the coast, 



mostly perhaps in the north. It grows to a length of 3 



feet, and bears a stronsj resemblance to the 

 t Sea-Trout. ' s- ^ • , , p , 



salmon, save tor the occasional absence of the 



X-spots. In habits it is also similar, only it feeds more 



