a presbyter of the Church of Rome, who flourished about 210, in the time of Zephyrinus and Callistus. Photius calls him τῶν ἔθνων ἐπίσκοπος , a designation the meaning of which is not clear. When at Rome, he held a celebrated disputation with Proclus, the head of a sect of Montanists, which he afterward reduced to writing in the form of dialogues. Eusebius quotes fragments of this work in lib. 2, cap. 25, and also in lib. 3, cap. 28, and lib. 6, cap. 20. Caius also wrote a book called The Labyrinth, and another against Artemon, unless the former be the same with the work attributed to Origen, as Cave supposes. Eusebius gives an extract from the Parvus Labirinthus against Artemon and Theodotus, lib. 5, cap. 28. Photius also attributes to this Caius a Treatise on the Universe, but both this and the "Labyrinth" are now attributed to Hippolytus. See Bunsen, Hippolytus and hs ‘ Times; also Origen' or fli polytus, in the WMeth. Quarterly Revieu', 1151, p. 646; Landon, s.v. (See HIPPOLYTUS).