6. The Magnus who lived after Themison, about the same time as Archigenes, or a littie earlier, and who belonged to the medical sect of the Pneumatici (Galen, De Differ. Puls. 3.2, vol. viii. p. 646), was also probably a different person from any of the preceding, and lived in the latter half of the second century after Christ. He wrote a work, Περὶ τῶν Ἐφευρημένων μετὰ τοὺς Θεμίσωνος Χρόνους, De Inventis post Themisonis Tempora, consisting of at least three books (Gal. ibid. p. 641), from which several passages are quoted by Galen relating to the pulse (ibid. pp. 640, 641,756). On this subject Magnus differed in several points from Archigenes, by whom some of his opinions were controverted. (Gal. De Caus. Puls. 1.4, vol. ix. pp. 8,18, 21, Id. De Differ. Puls. vol. viii. pp. 638, 640, &c.)