bishop of SAMOSATA, about 430 A. D., took part in the Nestorian controversy against Cyril, patriarch of Alexandria, in answer to whose anathemas he wrote two books, of the first of which a large part is quoted by Cyril, in his and of the second some fragments are contained in the of Anastasius Sinaita. Though prevented by illness from being present at the council of Ephesus (A. D. 431), he joined Theodoret in his opposition to the agreement between Cyril and John, and, like Theodoret, he changed his course through fear, but at a much earlier period. About 436 he yielded to the persuasions of John, and joined in the condemnation of Nestorius. Eight letters by him are extant in Latin in the " Epistolae Ephesinae" of Lupus.