In Greek mythology, Crius (Greek: Κριως, Krios, "ram" or "ruler"), also known as Megamedes (Greek: Μεγαμηδες, "great lord"), was one of the Titans who rebelled against the Olympians. He is considered to have presided over constellations.
When planning to overthrow his father, Cronus persuaded Crius, Hyperion, Iapetus, and Coeus to help him with this feat. Cronus had his four brothers grab their father from the four pillars of the world and hold onto him so Cronus could castrate him. In this myth, Crius represented the south pillar.