4. Of MAGNESIA, was the author of a work entitled , and of a second on the lives of philosophers (περὶ βίων φιλοσόφων), of both of which Diogenes Laertius appears to have made great use. (2.82, 6.12, 13, 20, 36, 87, 91, 99, 103, 7.48, 162, 166, 179, 181, 9.61, 65, 10.12.)