1. The celebrated Cyclops in the island of Thrinacia, was a son of Poseidon, and the nymph Thoosa. For an account of him see the article CYCLOPES.
2. A son of Elatus or Poseidon and Hippea, was one of the Lapithae at Larissa in Thessaly. He was married to Laonome, a sister of Heracles, with whom he was connected by friendship. He was also one of the Argonauts, but being left behind by them in Mysia, he founded Cios, and fell against the Chalybes. (Hom. Il. i. 264; Schol. ad Apollon. Rkod. i. 40, 1241, iv. 1470; Val. Flacc. i. 457; Apllod. i. 9. §§ 16, 19.)