74 THE LIFE OF THE SALMON 
migration, and without any doubt the same habit 
subsists throughout the life of the salmon. When, 
however, we reach the stage in advance of that 
just presented, it becomes impossible without the 
assistance of scale examination in each case to 
identify with certainty the particular class of fish 
marked. The weights of the summer fish last re- 
ferred to are from 19 to 25 lb., but the weights of 
the large Tay spring fish are, we have already seen, 
very similar. Therefore the arbitrary selection of 
kelts is almost certain to include both classes of fish. 
To carry out the same system of selection is, more- 
’ over, to deal with really heavy fish, which, as every 
one who has long looked forward to the landing of 
a thirty-pounder knows, are not to be met with 
every day. Fish much heavier than 30 lb. are of 
course taken from time to time, but we are approach- 
ing the normal limits of the salmon’s growth in 
Scotland or Ireland, and heavy kelts which are 
marked do not for the most part reappear. I can, 
however, instance two Tay fish and one Deveron 
fish which take us beyond 30 lb. The Tay fish 
show the long period in the sea, and the Deveron 
fish shows the short period, so that we may fairly 
assume that the twofold habit obtains till a late 
period in the salmon’s life. The records are :— 
14 Ib. ie , - T: 
s161{ 36 Kelt Fem. Jan. 17, 1902 ‘ay 
33 ,, 43” Clean Fem. July 27,1903 Tay 
F a Ib. 36)” Kelt Fem. Feb. 11,1904 Tay 
16 Bisa, 43” = Clean.“ Fem. July 17,1905 Tay 
19 lb. 38” Kelt Fem. Mar. 4, 1902 Deveron 
654i { 4 414” Unspawned Fem. Oct. 22, 1902 Deveron 
