the recently discovered Philosophoumena of Hippolytus; and the further addition of thirty- two fragments of a Syriac version of the Greek text of Irenæus, culled from the Nitrian col- lection of Syriac mss. in the British Museum. These fragments are of considerable interest, and in some instances rectify the readings of the barbarous Latin version, where, without such aid, it would have been unintelligible. The edition of Harvey will be found constantly referred to in the notes appended to our translation. 840 Introductory Note to Irenæus Against Heresies