2. A son of Poseidon and Astypalaea, was king of Cos, and was killed by Heracles who on his return from Troy landed in Cos, and being taken for a pirate, was attacked by its inhabitants. (Apollod. 2.7. §§ 1, 8. ) According to another tradition Heracles attacked the island of Cos, in order to obtain possession of Chalciope, the daughter of Eurypylus, whom he loved. (Schol. ad Pind. Nem. 4.40; comp. Hom. Il. 2.676, 14.250 &c., 15.25.)