the name of four islands of Asia, in the sea of the same name. The largest is about 30 miles in circumference; and the soil of them all produces corn, wine, and fruits. The sea of Marmora is a large gulph, which communicates both with the Archipelago and the Black Sea by that of Constantinople, being 120 miles in length and 50 in breadth; and all ships must pass through it that fail to Constantinople from the Mediterranean. It was anciently the Propontis.