Marcosians or Colobarsians
Marcosians Or Colobarsians an ancient sect in the Church, making a branch of the Valentinians. Irenaeus 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 as canonical, and of the same authority with ours. Out of these they picked several idle fables touching the infancy of Jesus Christ, which they circulated as authentic histories. Many of these fables are still in use and credit among the Greek monks. SEE VALENTINIANS.