The Basilidians or Basilideans were founded by Basilides of Alexandria in the second century. Basilides claimed to have been taught his doctrines by Glaucus, a disciple of St. Peter, but could also have been a pupil of Menander. Basilidianism survived until the end of the 4thcentury as Epiphanius knew of Basilidians living in the Nile Delta. It was, however, almost exclusively limited to Egypt, though according to Sulpicius Severus it seems to have found an entrance into Spain through a certain Mark from Memphis. St. Jerome states that the Priscillianists were infected with it.