In order to study the exegetical catenae, collections of excerpts from the biblical commentaries of the Church Fathers, compiled between the 6th century A. D. and the end of the Byzantine period, it is very useful to compare them with the scholia on the classical Greek texts. Through a comparative analysis of the exegetical material which can be found in the manuscripts about the prologue to the book of Jeremiah, on one hand, and about the prologue to the Iliad, on the other hand, we can study the characteristics of these two literary forms on concrete data. We can therefore observe that they have scholarship features in common (links between text and commentaries, interest in textual variants and in parallel quotations), but that they do ...