The first specimens of the mountain goat to be described, came from the Cascade Mountains on the Columbia River in Oregon and of course now stand as the type of _Oreamnos montanus_, having been first described by Rafinesque in 1817. This subspecies is intermediate in size between the eastern form of American goat, _O. m. missoulæ_, and the large Canadian _O. m. columbianus_, and, is characterized by a short but broad skull. The true _Oreamnos montanus_ extends from about the Canadian boundary, south through Washington into Oregon. In the '70's a considerable number were found on Mt. Ranier in Washington, and they still occur on Mt. Baker to the northward. It is absent, however, from the Olympic Mountains, from Vancouver Island and from the southern Cascades in Oregon. Nothing is known of the northern limits of this subspecies, but it probably does not extend very far into British Columbia, merging at that point into _O. m. columbianus_. The most southerly Oregon records that the writer has been able to obtain is Mt. Jefferson in that State, latitude 44° 40' north, in approximately the same latitude as the Sawtooth Mountains in Idaho. Probably the only place where the goat exists to-day in the State of Oregon is the mountains in Wallowa County, in the extreme northeast corner of the State, and the animals from that locality are probably to be referred to as _O. m. missoulæ_. They have long since vanished from Mt. Hood and from the other peaks in the western part of the State, where they once abounded. In the State of Washington they exist in reduced numbers from the Canadian boundary as far south as Mt. Adams, although at the latter point they are possibly now extinct. Throughout the State the frequency of names, such as "goat rocks," "goat paths," "goat buttes" and "goat creeks," testify to their early abundance, and they were formerly shot from the decks of steamers on Lake Chelan by hunters who took a wanton delight in seeing the wounded animals fall down the precipitous banks. In the Mt. Rainier Forest Reserve they are found in small numbers. In the isolated volcanic peaks along the coast the goat is too easily reached to be allowed to survive, and it is probable that before many years the interesting animal will be entirely exterminated in the United States except in the main Rockies. The Alaskan form, at the extreme western limit of the genus, in the neighborhood of the Mt. St. Elias Alps and the Copper River, was described by Dr. D. G. Elliot, in 1900, as a second and valid species, under the name of _Oreamnos kennedyi_. It is strongly characterized by the lyrate shape of the horns and certain anatomical features.