In its length, then, the island extends parallel to the coast for a distance of about one thousand two hundred stadia from Cenaeum to Geraestus, but its breadth is irregular and generally only about one hundred and fifty stadia. Now Cenaeum lies opposite to Thermopylae and, to a slight extent, to the region outside Thermopylae, whereas Geraestus and Petalia lie towards Sunium. Accordingly, the island lies across the strait and opposite Attica, Boeotia, Locris,and the Malians. Because of its narrowness and of the above-mentioned length, it was named Macris1
by the ancients. It approaches closest to the mainland at Chalcis, where it juts out in a convex curve towards the region of Aulis in Boeotia and forms the Euripus. Concerning the Euripus I have already spoken rather at length,2
as also to a certain extent concerning the places which lie opposite one another across the strait, both on the mainland and on the island, on either side of the Euripus, that is, the regions both inside and outside3
the Euripus. But if anything has been left out, I shall now explain more fully. And first, let me explain that the parts between Aulis and the region of Geraestus are called the Hollows of Euboea; for the coast bends inwards, but when it approaches Chalcis it forms a convex curve again towards the mainland.