Chemmis was described by Pomponius Mela as a floating island in Egypt. This island had sacred groves and a temple of Apollo, and it floated wherever the wind blew it. No further information is given.
Plutarch, telling of the story of the Egyptian gods Isis and Osiris, tells that Isis loosened the island of Chemmis from its foundation and set it afloat to protect her son Horus from her enemy Seth. This island moved around, and was sometimes on the Nile and sometimes on the sea.
Herodotus tells: "The next greatest marvel was the island called Chemmis. This island lies in the middle of a broad and deep lake close by the temple, and the natives declare that it floats. For my own part I did not see it float, or even move; and I wondered greatly, when they told me concerning it, whether there be really such a thing as a floating island. It has a grand temple of Apollo built upon it, in which are three distinct altars. Palm trees grow on it in great abundance, and many other trees, some of which bear fruit, while others are barren. The Egyptians tell the following story in connection with this island, to explain the way in which it first came to float:- "In former times, when the isle was still fixed and motionless, Latona, one of the eight gods of the first order, who dwelt in the city of Buto, where now she has her oracle, received Apollo as a sacred charge from Isis, and saved him by hiding him in what is now called the floating island. Typhon meanwhile was searching everywhere in hopes of finding the child of Osiris. The island, therefore, in consequence of this event, was first made to float. Such at least is the account which the Egyptians give."
One may also find information regarding the god Melqart and the floating island of Chemmis here: http://books.google.com/books?id=e6I...sult#PPA114,M1