or Alaskia, a long narrow peninsula on the north-west coast of North America, forming apparently a continental continuation of the chain of the Aleutian islands. It consists mostly of a ridge of steep rocky mountains, which in some parts attain a great elevation. At its eastern extremity, N. Lat. 60°, there is an active volcano 14,000 feet in height, and at the western extremity there are several cones of great elevation, which have been seen burning, and are covered for two thirds of their upper portions with perpetual snow. At the same extremity, the island of Unimak, separated only by a narrow strait, has enormous volcanoes, one of them named Chichaldinsk, rising in a regular cone to the height of 8083 feet.