a son of Magnes, was king of the island of Seriphos. He received with great kindness Danae and her son Perseus, who had been exposed on the sea by Acrisius. He took great care of the education of Perseus; but becoming enamoured of Danae, he removed her from his kingdom, apprehensive of his resentment. He afterwards paid his addresses to Danae; and being rejected, he prepared to offer her violence. Danae fled to the altar of Minerva for protection; and Dictys, the brother of Polydectes, who had himself saved her from the sea-waters, opposed her ravisher, and armed himself in her defence. At this critical moment Perseus arrived; and with Medusa's head he turned into stones Polydectes, with the associates of his guilt. The crown of Seriphos was given to Dictys, who had shown himself so active in the cause of innocence.