This mountain lies above both seas, both the Pontic and the Caspian, and forms a wall across the isthmus that separates the two seas. It marks the boundary, on the south, of Albania and Iberia, and, on the north, of the plains of the Sarmatae. It is well wooded with all kinds of timber, and especially the kind suitable for shipbuilding. According to Eratosthenes, the Caucasus is called "Caspius" by the natives, the name being derived perhaps from the "Caspii." Branches of it project towards the south; and these not only comprise the middle of Albania but also join the mountains of Armenia and the Moschian Mountains, as they are called, and also the Scydises and the Paryadres Mountains. All these are parts of the Taurus, which forms the southern side of Armenia,parts broken off, as it were, from that mountain on the north and projecting as far as the Caucasus and that part of the coast of the Euxine which stretches from Colchis to Themiscyra.