Note 51 — Chapter VI · PLATONIC CANON, AS RECOGNISED BY THRASYLLUS.

Diogenes (ix. 49) uses the same phrase in regard to the spurious works ascribed to Demokritus, τὰ δ’ ὁμολογουμένως ἐστὶν ἀλλότρια. And I believe that he means the same thing by it: that the works alluded to were not recognised in the Alexandrine library as belonging to Demokritus, and were accordingly excluded from the tetralogies (of Demokritus) prepared by Thrasyllus.