Planting of quinnat salmon and steelhead trout in Maine streams. The United States Fish Commission is making the experiment of planting large numbers of non-indigenous salmon in the Penobscot Basin and other Maine waters with a view to test whether the fishes are adapted to those streams. The species with which trials have thus far been made are the quinnat or chinook salmon (_Oncorhynchus tschawytscha_) and the steelhead trout (_Salmo gairdneri_). It is intended to plant sufficiently large numbers of yearling fish to fully test the feasibility of the project; and in the event of success two extremely valuable species will have been added to the fishery resources of the Maine streams. During the years 1896 and 1897 over 2,000,000 young quinnat salmon and steelheads were deposited by the Commission in the Penobscot River and adjacent waters, several hundred thousand of which were four to six months old. The planting of additional fry and yearlings is contemplated in order to thoroughly demonstrate whether their introduction is possible. The quinnat salmon ranges along practically the entire Pacific Coast of North America north of Mexico, entering all suitable streams. It is the most valuable member of the salmon family, and is taken in very large quantities for canning, salting, and fresh consumption. Its flesh is very rich and of a deep-red color. It is caught in the rivers with gill nets, seines, pound nets, traps, weirs, wheels, and other appliances. In Monterey Bay, California, large numbers are taken with trolling hooks baited with small fish, and, although the fish abstains from food after entering the fresh waters, it may often be lured with artificial or other baits. The chinook salmon begins to enter the California rivers in February, the Columbia in March, and the Alaskan rivers in May and June. The spawning season covers six months, extending from June to December, although the spawning period in any given basin is more limited, seldom exceeding one or two months. The highest accessible positions in the streams are sought by the spawning fish, which make rounded excavations in gravelly bottoms, in which the eggs are deposited. The vitality of the fish rapidly decreases after spawning, their bodies become mutilated and diseased, and in a short time they die.