Lectionary 331 (Gregory-Aland), designated by siglum ℓ 331 (in the Gregory-Aland numbering)[1] is a Greek manuscript of the New Testament, on parchment.
The original codex contained lessons from the Gospel of John (Evangelistarium), with lacunae[2] on 118 parchment leaves.
[3][4] It was written by a monk named Cosmas for one Basilius.
[2] Currently the codex is housed at the British Library (Add MS 28818) in London.
[3][4] The fragment is not cited in critical editions of the Greek New Testament (UBS4,[6] NA28[7]).