DEUCALION, in Greek legend, son of Prometheus, king of Phthia in Thessaly, husband of Pyrrha, and father of Hellen, the mythical ancestor of the Hellenic race. When Zeus had resolved to destroy all mankind by a flood, Deucalion constructed a boat in which he landed on Mount Parnassus with his wife. Having offered sacrifice and enquired how to renew the human race, they were ordered to cast behind them the "bones of the great mother," that is, the stones from the hill-side. Those thrown by Deucalion became men, those thrown by Pyrrha, women.