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 Propontis851 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 Cyziceni852 is situated, with the other islands around it.