The commentary, by lemmas, does not include text of the Institutiones.
Leaf 357b, at end of text: Eruditissimos Angeli Aretini ... in Institutiones Justinianeas co[m]me[n]tarios ex vetustioribus duobus exe[m]plaribus omnibus collatis, interiectisq[ue] rerum summis representauit Pardulphus Prateius.
On leaf 98a, "Substitutionum arbor" (full-page woodcut). The chapter or chapters that follow, on substitutions, are in some editions identified as the Tractatus substitutionum by Antonius Caius; they statedly date from 1541 (l. 98b, par. "Nouo ordine")
Device on t.p.: lion rampant in an oval shield surrounded by an ornamental frame with the figure of sword-wielding Justice at top.
Colophon: Lugduni, Excudebat Blasius Guido.
Signatures: a-z⁶ A-Z⁶ Aa-Nn⁶ Oo⁴ (Oo4 blank); ²A-B⁶ ²C⁸ (²C8 blank). Two-column layout.
Includes index.