HIPPOCRENE (Gr. ii'irov ,cprivrl ), "the fountain of the horse," the spring on Mt. Helicon, in Boeotia, which like the other spring there, Aganippe, was sacred to the Muses and Apollo, and hence taken as the source of poetic inspiration. The spring, sur rounded by an ancient wall, is now known as Kryopegadi or the cold spring. According to the legend, it was produced by the stamping of the hoof of Bellerophon's horse Pegasus. The same story accounts for the Hippocrene in Troezen and the spring Peirene at Corinth.