（*)/Akrwn), an eminent physician of Agrigentum, the son of Xenon. His exact date is not known; but, as he is mentioned as being contemporary with Empedocles, who died about the beginning of the Peloponnesian war, he must have lived in the fifth century before Christ. From Sicily he went to Athens, and there opened a philosophical school (e)sofi/steuen).
It is said that he was in that city during the great plague (B. C. 430), and that large fires for the purpose of purifying the air were kindled in the streets by his direction, which proved of great service to several of the sick. (Plut. De Is. et Osir. 80 ; Oribas. Synops. 6.24, p. 97; Aetius, tetrab. ii. serm. 1.94, p. 223; Paul Aegin. 2.35, p. 406.)
It should however be borne in mind that there is no mention of this in Thucydides (2.49, &c.), and, if it is true that Empedocles or Simonides (who died B. C. 467) wrote the epitaph on Acron, it may be doubted whether he was in Athens at the time of the plague. Upon his return to
（*Knh=mos), the Spartan high admiral (naua/rxos) in the second year of the Peloponnesian war, B. C. 430, made a descent upon Zacynthus with 1000 Lacedaemonian hoplites; but, after ravaging the island, was obliged to retire without reducing it to submission. Cnemus was continued in his office of admiral next year, though the regular term, at least a few years subsequently, was only one year.
In the second year of his command (B. C. 429), he was sent with 1000 hoplites again to co-operate with the Ambracians, who wished to subdue Acarnania and to revolt from Athens.
He put himself at the head of the Ambracians and their barbarian allies, invaded Acarnania, and penetrated to Stratus, the chief town of the country.
But here his barbarian allies were defeated by the Ambracians, and he was obliged to abandon the expedition altogether. Meantime the Peloponnesian fleet, which was intended to co-operate with the land forces, had been defeated by Phormio with a far smaller number of shi