or COLOBARSIANS, an ancient sect in the church, making a branch of the Valentinians. St. Irenxus speaks at large of the leader of this sect, Marcus, who it seems was reputed a great magician. The Marcosians had a great number of apocryphal books which they held for canonical, and of the same authority with ours. Out of these they picked several idle fables touching the infancy of Jesus Christ, which they put off for true histories. Many of these fables are still in use and credit among the Greek monks.