126 FISHES. 
August, or September are wet, the Salmon commence 
running from the sea—if otherwise, their ascent is delayed 
until the autumn rains set in. 
The eggs are usually deposited in November and 
December, and take from ninety to one hundred and 
thirty days to hatch, but this is greatly dependent on 
the temperature of the water and other conditions. It 
was formerly a prevalent belief that the fry, or ‘parr’ as 
they are termed, migrated during the first year, a theory 
not now entertained. The young fish, hatched say in 
March, remain in the river until April or May of the year 
following, that is for thirteen or fifteen months after leaving 
the ova. They have by that time assumed the migratory 
dress, thus becoming ‘smolts,’ and are carried down to 
the sea with the first floods of May. Mr. Phillips con- 
siders that the weight of evidence favours the opinion that 
smolts do not return the same year in which they enter the 
sea, but that they remain there about fifteen months, and 
ascend the river as ‘grilse’ along with the Salmon about 
the month of August in the second season. 
For much interesting information on Yorkshire Salmon 
we are indebted to Mr. John H. Phillips, Secretary to the 
Yorkshire Salmon Fishery Board, to Mr. Samuel Wilkin- 
son, Secretary to the Esk Salmon Fishery Board, and to 
Mr. H. T. Gardiner, of Goole. 
199. Salmo trutta lem. Salmon-Trout. Sea-Trout. 
Freshwater resident, periodically descending to the sea, 
present in all the rivers frequented by S. Salar, especially 
in those flowing into the North Sea, and is particularly 
abundant in the Esk and Tees, where it is known both as 
‘salmon-trout’ and ‘bull-trout.” Very abundant along the 
coast, and was taken in numbers in the stake nets which 
formerly existed in Bridlington Bay. The dates for this 
species are substantially the same as those for the Salmon, 
the spawning season (as given for the Esk) being in 
November and December, the kelts descending during the 
months of March, April, and May, and re-ascending in 
June, the smolts descending in April and May. 
The ‘Bull-Trout’—thoroughly and generally believed 
in as a distinct species in Yorkshire—is very abundant in 
the Esk and the Tees. Dr. Giinther, however, states that 
all specimens of the so-called ‘ Bull-Trout’ that he has 
examined have been referable to .S. ¢vu¢ta (Salmon-trout), 
