Scholia (singular scholium or scholion, from Greek "comment", "interpretation") are grammatical, critical, or explanatory comments, either original or extracted from pre-existing commentaries, which are inserted on the margin of the manuscript of an ancient author, as glosses. One who writes scholia is a scholiast.

Scholia Graeca in Homeri Iliadem
Scholia Graeca in Homeri Iliadem (Scholia vetera)
Scholia Graeca in Homeri Iliadem (scholia vetera)
Newton: The Classical Scholia
The Influential Fictions In The Scholia To Pindar's Pythian 8
Literary Criticism in the Exegetical Scholia to the Iliad: A Sketch
Newton's scholia from David Gregory's estate on the propositions IV through IX book III of his Principia
Praefatio : Scholia Graeca in Aeschylum quae exstant omnia, Pars II/Fasc 2I, Scholia in septem adversus Thebas continens
The Logos Endiathetos and the Logos Prophorikos in Allegorical Interpretation: Philo and the D-Scholia to the Iliad
Ancient Greek Scholarship: A Guide to Finding, Reading, and Understanding Scholia, Commentaries, Lexica, and Grammatical Treatises...