Salmonidz 315 
tances as those traversed by the quinnat and the blue-back. 
Its kelts, therefore, for the most part survive the act of spawn- 
ing. Dr. Day thinks that they feed upon the young salmon in the 
rivers, and that, therefore, the destruction of the kelts might 
increase the supply of salmon. 
As a food-fish the Atlantic salmon is very similar to the 
quinnat salmon, neither better nor worse, so far as I can see, 
when equally fresh. In both the flesh is rich and finely flavored ; 
but the appetite of man becomes cloyed with salmon-flesh sooner 
than with that of whitefish, smelt, or charr. In size the Atlan- 
tic salmon does not fall far short of the quinnat. The average 
weight of the adult is probably less than fifteen pounds. The 
largest one of which I find a record was taken on the coast of 
Ireland in 1881, and weighed 84? pounds. 
The salmon is found in Europe between the latitude of 45° 
and 75°. In the United States it is now rarely seen south of 
Cape Cod, although formerly the Hudson and numerous other 
rivers were salmon-streams. Overfishing, obstructions in the 
rivers, and pollution of the water by manufactories and by 
city sewage are agencies against which the salmon cannot cope. 
Seven species of salmon (as distinguished from trout) are 
recognized by Dr. Gunther in Europe, and three in America. 
The landlocked forms, abundant in Norway, Sweden, and 
Maine, which cannot, or at least do not, descend to the sea, are 
regarded by him as distinct species. ‘‘The question,’’ observes 
Dr Gunther, “whether any of the migratory species can be 
retained by artificial means in fresh water, and finally accom- 
modate themselves to a permanent sojourn therein, must be 
negatived for the present.’’ On this point I think that the 
balance of evidence leads to a different conclusion. These 
fresh-water forms (Sebago and Ouananiche) are actually salmon 
which have become landlocked. I have compared numerous 
specimens of the common landlocked salmon (Salmo salar 
sebago) of the lakes of Maine and New Brunswick with land- 
locked salmon (Salmo salar hardinz) from the lakes of Sweden, 
and with numerous migratory salmon, both from America and 
Europe. I see no reason for regarding them as specifically 
distinct. The differences are very trivial in kind, and not 
greater than would be expected on the hypothesis of recent 
