Owing to the wise forethought of our American people, a practical foundation of the system of national reservations has been instituted in our so-called national parks. Although these reservations were established to preserve to the public certain natural beauties in the way of scenery or vegetation, or to secure the regimen of streams, they will, if properly guarded against depredations, effect the end which we have in view. Owing to their large area and somewhat varied positions, these parks provide a safe refuge for a great part of the life which belongs in the Cordilleran district of the United States. If the method should be extended to the whole country, we should have the peculiar satisfaction of having been the first state to institute the system of preservation which is here suggested. To complete a system of reservations designed to perpetuate the aboriginal life of this country would require the institution of about a dozen other similar natural shelters. It would not be necessary to have these on as large a scale as that of the Yellowstone. In most cases areas of from ten to twenty thousand acres in extent would, if well guarded, suffice to give refuge to the animals and plants of the field in which it lay. The selection of these refuges would demand much consideration. In general, it may be said that they need to include at least two on the Atlantic coast, which might also be fitted for the use of marine birds as breeding places, one on the northern part of the coast of Maine, and another in southern Florida. The latter might serve as well for the protection of the turtles which resort to that shore to lay their eggs. Similar coast parks should be established on the shores of the Pacific. Yet other closed areas would be needed in the interior, the evidently desirable fields lying in the region about the headwaters of the Mississippi, in the Adirondacks, in the mountains of North Carolina, in the lower part of the Mississippi delta, in Arizona, and at least two points in Alaska; one of these should afford a place of refuge for the persecuted fur seals and another for the musk-ox.