194 THE ROYAL SOCIETY OF CANADA 



much short, 5-4 inches, the fourth year of the 5-year class 4-0, of the 

 4-year class 1-8, the fifth year of the 5-year class 1-3. 



Here again, there is the anomaly of the second year at sea exceed- 

 ing the first year, similar to that found in the sockeye of the 1-year 

 stream type in Rivers inlet, but there it is even more remarkable. 

 Although 6-4 inches is given as the first year's growth, it is really 

 the length of a year from the time the yolk was absorbed, or shortly 

 after, at which time the fry would be nearly IJ^ inches long, hence, 

 the actual growth during the year would be only about 5 inches, 

 while in the second year, it is 8-3 inches, about 60 per cent higher. 

 This second year growth corresponds very well with the first year 

 growth at sea of the 1-year stream type. Whether the same influence 

 is at work here as in the case of the Rivers inlet fish or what it is in 

 either case, it is impossible to say at present. 



After the second year the growth is not quite so rapid as in the 

 case of the 1-year stream type of the same age, and in consequence 

 the 4 and 5-year fish are not much greater in length than those of the 

 same age of the 1-year stream type. It is little advantage to the fish 

 apparantly to migrate to the salt water as fry. In this respect it is 

 very different to the spring salmon, where the sea type salmon are 

 almost a year ahead of the 1-year stream type, throughout. 



COHO 



All the 1916 coho examined, with exception of a small number of 

 males in their second year, which were taken from a trap belonging 

 to the Fisheries Department, in the Salmon river, near Harmsworth, 

 on November 10, were obtained at the Nanaimo cannery from July 7 

 to October 6. They were caught at various places in the strait of 

 Georgia between Comox to the northwest and Cowichan gap (Porlier 

 pass) to the southeast, and a few were brought over from the Fraser 

 river. They were therefore suitable for comparison with those exa- 

 mined from the previous year. 2,000 in all were examined, and all 

 of them, with the exception of 28, were in their third year. These 

 28 were 2-year-old ;males, largely made up of the lot from the Salmon 

 river above referred to. Scarcely any 2-year fish came into the can- 

 nery. When the fish were caught with nets, the mesh suitable for the 

 3-year fish would let the 2-year fish pass through, but as many of the 

 fish were caught with handlines, one should suppose that they would 

 be as liable to be caught as the larger fish if there were many of them 

 in the same area. They were said to be plentiful in the Fraser river 

 at times, but there the nets are used exclusively. The Salmon river 

 trap was so built across the river that all fish passing up had to pass 



