(Μάρκος), a citizen of Ceryneia, in Achaia, had the chief hand in putting to death the tyrant of Bura, which thereupon immediately joined the Achaean League, then in process of formation. When the constitution of the league was altered, and a single general was appointed instead of two, Marcus was the first who was invested with that dignity, in B. C. 255. In B. C. 229 the Achacans sent ten ships to aid the Corcyraeans against the Illyrian pirates, and, in the battle which ensued, the vessel in which Marcus sailed was hoarded and sunk, and he perished with all the rest of the crew. Polybius highly commends his services to the Achaean confederacy. (Pol. 2.10, 41, 43; Clint. F. H. vol. ii. pp. 240, 241, vol. iii. p. 14.) [E. E.]