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 sail to Constantinople from the Mediterranean. It was anciently the Propontis.