Occurs as a surname of several gods. 1. Of Zeus, who is described by it as the god who descends in thunder and lightning. Under this name he had an altar at Olympia. (Paus. v. 14. § 8; Lycophr. 1370.) Places which had been struck by lightning, i. e. on which Zeus Cataebates had descended, were sacred to him. (Poliux, ix. 41; Suid. and Hesych. s. v.) 2. Of Acheron, being the first river to which the shades descended in the lower world. 3. Of Apollo, who was invoked by this name to grant a happy return home (katabasis) to those who were travelling abroad. (Eurip. Bacch. 1358; Schol. ad Eurip. Phoen. 1416.) 4. Of Hermes, who conducted the shades into Hades. (Schol. ad Aristoph. Pac. 649.)