ACASTUS, son of Pelias, but the friend of Jason ; he took part in the Calydonian boar-hunt and the Argonautia expedition. After his father's death he instituted splendid funeral games in his honour. His wife Astydameia (called Hippolyte in Horace, Odes iii. 7, 17) fell in love with Peleus (q.v.), who had taken refuge at Iolcus, and accused him falsely to her husband (cf. BELLEROPHON, HIPPOLYTUS). Acastus thereupon left Peleus asleep on Mount Pelion, having first hidden his famous sword. On awaking, Peleus was attacked by the Centaurs, but saved by Cheiron. Having recovered his sword he returned to Iolcus and slew Acastus and Astydameia.