Thank you gentlemen.
I was of another opinion that proved to be false. I am indebted.
The document of the Carthagenian Canon (Canonum Ecclesiæ Africanæ) specifically states that the accepted canonized books were quia a patribus ista accepimus in ecclesia legenda”, namely those "traditionally read in African churches." The Cabon represents those books read traditionally in African churches, not the universal (catholic) Church.
This document is unfortunately also showing signs of latter-day changes. First, it post facto attributes the Book of Hebrews to St. Paul because the sentence reads "thirteen Epistles of the Apostle Paul, one epistle of the same to the Hebrews," instead (as would be expected) "fourteen Epistles of Apostles Paul." The word "same" was an afterthought.
The document also says "Let this be made known also to our brother and fellow-priest Boniface, or to other bishops of those parts, for the purpose of confirming that Canon."
Pope Boniface succeeded Pope Siricius (the first Roman Bishop to use the title "pope") in 418 AD, so this indicates that the document is probably altered after that year.
Also note the way the Council addresses the Pope: "our fellow priest" (consacerdoti nostro), and not "His Holiness."