OCELLUS LUCANUS, a Pythagorean philosopher, born in Lucania in Italy, as his name implies, and supposed to have flourished during the fifth century B.C. He is said to have been a contemporary as well as a disciple of Pythagoras. The only definite information we possess respecting Ocellus—and even that is not of the most authentic character—is to be found in two letters cited by Diogenes Laertius (lib. viii., c. 80, 81), in which Archytas sends Plato a reading of four works of the Lucanian philosopher. Plato, in acknowledging the receipt of the precious MSS., expresses his admiration of their contents. These books contained treatises on Law, on Kingly Rule, on Piety, and on the Nature of the Universe. Of these writings, the only one which has come down to us is the last, entitled Περὶ τῶν τοῦ παντός φύσιος; written originally in Doric Greek; but the authorship of it is by no means clear. The best editions are those of Rudolphi, Leipzig, 1801; and of Mullach, Berlin, 1846. The Marquis D'Argens published an 8vo edition at Berlin, 1762, with a French translation and a commentary. There is a good edition by Batteux, 3 vols. 12mo, Paris, 1768; and an English version of Ocellus was published in 8vo, 1831, by Thos. Taylor.