These πρ€ξεις are mentioned also in chap. 25, below, where they are classed among the νόθοι, implying that they had been originally accepted as canonical, but were not at the time Eusebius wrote widely accepted as such. This implies that they were not, like the works which he mentions later in the chapter, of an heretical character. They were already known to Origen, who (De Prin. I. 2, 3) refers to them in such a way as to show that they were in good repute in the Catholic Church. They are to be distinguished from the Gnostic περίοδοι or πρ€ξεις Παύλου, which from the end of the fourth century formed a part of the Manichean canon of the New Testament, and of which some fragments are still extant under various forms. The failure to keep these Catholic and heretical Acta Pauli always distinct has caused considerable confusion. Both of these Acts, the Catholic and the heretical, formed, according to Lipsius (Apokr. Apostelgeschichten, II. 1, p. 305 sq.) one of the sources of the Catholic Acts of Peter and Paul, which in their extant form belong to the fifth century. For a discussion of these Catholic Acts of Paul referred to by Eusebius, see Lipsius, ibid., p. 70 sq.