Hermes and his caduceus or serpent-staff, were among alchemy's principal symbols. Like Hermes, Iris carries a caduceus or winged staff. She carries a caduceus or winged staff. The astronomical symbol for Mercury is a stylized version of Hermes' caduceus. Sometimes she holds a caduceus, a symbol of Pax (Roman goddess of Peace). Hermanubis depicted with a human body and a jackal head, holding the caduceus. Her primary attributes are the caduceus and cornucopia. On Hermes' caduceus, the snakes were not merely duplicated for symmetry, they were paired opposites. Special objects include the President's staff of office, the caduceus and the silver-gilt College mace. He carried a staff wrapped with two snakes, known as the caduceus. He is often depicted holding the caduceus in his left hand. A passage in Virgil's "Aeneid" describes him clearing the skies with his caduceus. CADUCEUS and MYCIN were medical diagnosis systems. Smith copies himself onto Bane (Ian Bliss), a crew member of the Zion hovercraft "Caduceus". The ship has the features of a Caduceus representing trade and economy.