Kelsie Rodenbiker has a helpful article clarifying some issues about the odd canon list in Codex Claromontanus (the so-called Catalogus Claromontanus). The pre-pub was uploaded back in March and is available here but it looks like the JSNT version isn’t out yet.
For context, here is the NT list of books with stichometry (copied from here).
Evangelia .IIII. | Four Gospels: | ||
Mattheum ver. | ĪĪDC | Matthew | 2600 |
Iohannes ver. | ĪĪ | John | 2000 |
Marcus ver. | ĪDC | Mark | 1600 |
Lucam ver. | ĪĪDCCCC | Luke | 2900 |
Epistulas Pauli | Epistles of Paul: | ||
ad Romanos ver. | ĪXL | To Romans | 1040 |
ad Chorintios .I. ver. | ĪLX | To Corinthians 1 | 1060 |
ad Chorintios .II. ver. | LXX | To Corinthians 2 | 70 |
ad Galatas ver. | CCCL | To Galatians | 350 |
ad Efesios ver. | CCCLXV | To Ephesians | 365 |
ad Timotheum .I. ver. | CCVIII | To Timothy 1 | 209 |
ad Timotheum .II. ver. | CCLXXXVIIII | To Timothy 2 | 289 |
ad Titum ver. | CXL | To Titus | 140 |
ad Colosenses ver. | CCLI | To Colossians | 251 |
ad Filimonem ver. | L | To Philemon | 50 |
—ad Petrum prima | CC | —To Peter 1 | 200 |
ad Petrum .II. ver. | CXL | To Peter 2 | 140 |
Jacobi ver. | CCXX | Of James | 220 |
Pr. Iohanni Epist. | CCXX | Of John | 220 |
Iohanni Epistula .II. | XX | Of John 2 | 20 |
Iohanni Epistula .III. | XX | Of John 3 | 20 |
Iudae Epistula ver. | LX | Of Jude | 60 |
—Barnabae Epist. ver. | DCCCL | —Of Barnabas | 850 |
Iohannis Revelatio | ĪCC | Revelation of John | 1200 |
Actus Apostolorum | ĪĪDC | Acts of the Apostles | 2600 |
—Pastoris versi | ĪĪĪĪ | —Shepherd | 4000 |
—Actus Pauli ver. | ĪĪĪDLX | —Acts of Paul | 3560 |
—Revelatio Petri | CCLXX | —Revelation of Peter | 270 |
And here are images from the BnF.
She clarifies a few things that seem to have been missed or forgotten thanks, in part, to Tischendorf’s original transcription. In particular, she argues that (1) the lines (obeli?) before the four NT books (there is also one before Judith too that is often missed) are probably later than the original hand; (2) the line before 1 Peter is not a paragraphos (contra Metzger) but marks the odd title to 1 Peter which she (rightly in my view) accounts for as a scribe’s mistake due to the repetition of ad in the Pauline letters just before; (3) following Metzger, the omission of Philippians, 1–2 Thessalonians, and Hebrews is best explained by homoioteleuton from Ephesians (εφεσιους) to Hebrews (εβραιους) if the list was originally in Greek.
From this she concludes that we shouldn’t see the original list as equivalent to our current NT. Instead, it’s a witness to “the continuing elasticity of the New Testament canon” in the 6th century. Of course, we don’t know how much later the lines (obeli?) are from the original scribe and the fact that the NT list doesn’t match the very books in Claromontanus raises questions for me about the purpose (and weight) of the list in its current form.
In any case, Rodenbiker’s main contribution is to remind us of the line at Judith, to argue that the lines are later, and to offer a better explanation for the line at 1 Peter. On all three points, I think she’s right.
Update: Meade reminds me that he covered some of this ground in his Myths and Mistakes chapter.