First, some wisdom from old:

[…] non operatur plenitudo ergo legis est dileccio magi opere precium […]

This poignant lesson was left in the margin of manuscript BnF lat. 2316 for future generations to ponder over.

Finding codicological notes on the internet when you find out that you need to know more about a particular manuscript but are hundreds of kilometers removed from it, can be a very joyous occasion. At least, that is my experience. In that spirit, I put some of my findings online on Paris, BnF lat. 2316, one of the three extant manuscript witnesses to the Collectio 400 capitulorum. 

The ninth-century part of the manuscript (it is bound with a 25 twelfth-century folia) contains a fragment of the canon law collection known as the Dionysiana (fols. 26-84), the aforementioned Collectio 400 capitulorum (fols. 84-120), a fragment of the Breviarium apostolorum (fols. 120-1), some chapters of the Council of Aix-la-Chapelle of 801 (fols. 121-2), and an incomplete copy of Theodulf of Orléans’ first capitulary ad presbyteros parochiae suae of 797 (fols. 122-133).

It is now, in its entirety, available on Gallica, but (again) useful as online digitised manuscripts are, this does not allow for the following codicological observation.