Xenocrates, of Chalcedon (396-314), a pupil of Plato, president of the Academy, industrious and severe, I, 109. Xenophon, soldier, historian, disciple of Socrates, II, 87; the story of Hercules's choice, I, 118. Xerxes, king of Persia (485-465), son of Darius, invaded Greece (480), came to grief at Salamis and Plataea, III, 48. Youth, duties peculiar to, I, 123; II, 52; time for choosing profession, I, 117. Zeno, of Cytium (fourth century), pupil of Crates the Cynic and founder of the Stoic school (_see_ Stoics), III, 35. LETCHWORTH: AT THE ARDEN PRESS. CORRECTIONS: page original text correction 190 sn Fab. inc. Valhen^2, 402 Fab. inc. Vahlen^2, 402 230 fn _Ma co_ MSS. _Marco_ MSS. 344 set etiam adiuvat iniuriam? sed etiam adiuvat iniuriam? 413 treacherous and crue, I, 38. treacherous and cruel, I, 38. 421 friend o Quintus Metellus, friend of Quintus Metellus, 422 father of Phaethon, III, 94. father of Phaëthon, III, 94.