Note 2627 — BOOK IV. AN ACCOUNT OF COUNTRIES, NATIONS, SEAS, TOWNS, HAVENS, MOUNTAINS, RIVERS, DISTANCES, AND PEOPLES WHO NOW EXIST OR FORMERLY EXISTED.
John Bostock translation
Leake thinks that Colonis and Hydreia, now called Hydra, were the same island; but Kiepert thinks it the same as the small island to the south of Spetzia.