A metrical bestiary, with interlinear variant readings and an unattributed later prose commentary.
Caption title (leaf a2 recto), from incipit, reads: De naturis animalium.
Place of publication and name of publisher from colophon (leaf c5 verso).
Date of publication from Goff; Copinger suggests a date of  and Proctor gives a range of dates from March 1489 to Sept. 1492.
Leaves printed on both sides; 20 lines of text and 44 lines of commentary per page.
Final leaf (c6) is blank; wanting in Dibner Library copy.
Spaces for initials.
Imperfect: Leaves a1 and a6 are wanting; photostatic versions from another copy have been inserted in their place.
Old ms. annotations and animal sketches in margins; some affected by cropping.
Bookseller's printed catalog description of this copy on front free endpaper.
Bookplate: Burndy Library ... gift of Bern Dibner.
Bound in modern grey paperboard; title inked on spine.