[Footnote 2: Bernays has pointed out (in his valuable treatise, Die Dialoge des Aristoteles, p. 133) that the first in order, nineteen in number, among the titles enumerated by Diogenes, designate Dialogues. The longest of them, those which included more than one book or section, are enumerated first of all. Some of the dialogues appear to have coincided, either in title or in subject, with some of the Platonic:--[Greek: Peri\ Dikaiosu/nês], in four books (comparable with Plato's Republic); [Greek: Politikou=], in two books; [Greek: Sophistê\s, Mene/xenos, Sumpo/sion], each in one book; all similar in title to works of Plato; perhaps also another, [Greek: Peri\ r(êtorikê=s ê)\ Gru/llos], the analogue of Plato's Gorgias.] [Footnote 3: Diog. La. v. 27. [Greek: gi/gnontai ai( pa=sai muria/des sti/chôn te/ttares kai\ tettara/konta pro\s toi=s pentakischili/ois kai\ diakosi/ois e(bdomê/konta. Kai\ tosau=ta me\n au)tô=| pepragma/teutai bi/blia.]] [Footnote 4: Diog. La. v. 34. Heitz (Die Verlorenen Schriften des Aristoteles, p. 17) notices, as a fact invalidating the trustworthiness of the catalogue given by Diogenes, that Diogenes, in other places, alludes to Aristotelian compositions which are not mentioned in his own catalogue. For example, though Diogenes, in the catalogue, allows only five books to the Ethica, yet he himself alludes (v. 21) to the seventh book of the Ethica. But this example can hardly be relied upon, because [Greek: e)n tô=| e(bdo/mô| tô=n ê)thikô=n] is only a conjecture of H. Stephens or Ménage. The only case which Heitz really finds to sustain his remark, is the passage of the Prooemium (i. 8), where Diogenes cites Aristotle [Greek: e)n tô=| Magikô=|], that work not being named in his catalogue. But there is another case (not noticed by Heitz) which appears to me still stronger. Diogenes cites at length the Hymn or Pæan composed by Aristotle in honour of Hermeias. Now there is no general head of his catalogue under which this hymn could fall. Here Anonymus (to be presently mentioned) has a superiority over Diogenes; for he introduces, towards the close of his catalogue, one general head--[Greek: e)gkô/mia ê)\ u(/mnous], which is not to be found in Diogenes.]