a disciple of Socrates, who, after the death of that philosopher, retired to Megara, where he founded a school of philosophy. We know very little of his principles except in so far as they stand related to the sceptical school of a later period. His followers were generally distinguished by their dialectic subtlety; and as a consequent of this they Eudemos found themselves speedily reduced to universal doubt. The philosophy of Euclid was expounded in six dialogues, which are now lost.