1. A son of Poseidon by a daughter of Amphictyon, and accordingly a halfbrother of Triptolemus. (Paus. i. 14. § 1.) Others call him a son of Hephaestus. (Hygin. Fab. 38.) He came from Arcadia, and dwelt at Eleusis in Attica. (Plut. Thes. 11; Ov. Met. vii. 439.) He is notorious in ancient story for his cruelty towards his daughter Alope [see ALOPE] and all who refused to fight with him, but he was in the end conquered and slain by Theseus. (Paus. i. 39. § 3.)

2. Another personage of the same name is mentioned by Pausanias. (viii. 5. § 3; comp. AGAMEDES.)