23. To the north of the eastern Gulf of the Pontus, is the Lake Mæotis, whose perimeter is 9000 stadia or rather more. It communicates with the Euxine by means of the Cimmerian Bosphorus,[850] and the Euxine with the Propontis[851] by the Thracian Bosphorus, for such is the name given to the Strait of Byzantium, which is four stadia in breadth. The length of the Propontis from the Troad to Byzantium is stated to be 1500 stadia. Its breadth is about the same. It is in this sea that the Island of the Cyziceni[852] is situated, with the other islands around it. 24. Such and so great is the extent of the Ægæan Sea towards the north.[853] Again, starting from Rhodes, the [Mediterranean] forms the seas of Egypt, Pamphylia, and Issus, extending in an easterly direction from Cilicia to Issus, a distance of 5000 stadia, along the coasts of Lycia, Pamphylia, and the whole of Cilicia. From thence Syria, Phœnicia, and Egypt surround the sea to the south and west as far as Alexandria. The Island of Cyprus is situated in the Gulfs of Issus and Pamphylia, close to the Sea of Egypt. The passage between Rhodes and Alexandria from north [to south] is about 4000 stadia;[854] sailing round the coasts it is double this distance. Eratosthenes informs us that, although the above is the distance according to some mariners, others avow distinctly that it amounts to 5000 stadia; while he himself, from observations of the shadows indicated by the gnomon, calculates it at 3750. That part of the Mediterranean Sea which washes the coasts of Cilicia and Pamphylia together with the right side of the Euxine, the Propontis, and the sea-coast beyond this as far as Pamphylia, form a kind of extensive Chersonesus, the isthmus of which is also large, and reaches from the sea near Tarsus[855] to the city of Amisus,[856] and thence to the Themiscyran[857] plain of the Amazons. In fact the whole region within this line as far as Caria and Ionia, and the nations dwelling on this side the Halys,[858] is entirely surrounded by the Ægæan and the aforementioned parts of the Mediterranean and Euxine Seas.[859] This is what we call Asia properly,[860] although the whole continent bears the same name.