The marine Permian faunas of the world are subdivided into eight stages and nineteen substages, the Asselian Stage, with the Surenan, Uskalikian, and Kurmaian Substages; the Sakmarian Stage, with the Tastubian, Sterlitamakian, and Aktastinian Substages; the Baigeildzinian Stage, with the Sarginian and Krasnoufimian Substages; the Kungurian Stage, with the Filippovian and Irenian Substages, the latter including the Nevolin, Elkin, and Ufimian horizons; the Kazanian Stage with the Kalinovian and Sosnovian Substages; the Punjabian Stage with the Kalabaghian and Chhidruan Substages; the Djulfian Stage with the Urushtenian and Baisalian Substages, and the Dorashamian Stage with the Vedian and Ogbinan Substages and perhaps Griesbachian Substage or modification thereof. This offers the most extensive and refined scheme of correlation available for the Permian System, in which brachiopod correlations agree well with those proposed for the less abundant Permian ammonoids, and palaeotropical Fusulinacea. Each stage is discussed In terms of its type region and fauna based chiefly on Soviet or Pakistan outcrops, and then traced over the world in various palaeogeographic settings. The base of the Permian Period as understood in some regions possibly overlaps with Late Carboniferous, and the top of the marine Permian probably needs to be elevated to incorporate part or all of the Griesbachian 'Stage', generally classed as basal Triassic. Such questions should be resolved by international discussion.