Callo

(Καλλώ), an orphan who lived at Epidaurus about thirty years after the death of Alexander the Great, and was commonly considered to be a girl. She accordingly married, and lived with her husband for two years. After that time, she was taken seriously ill, and had to undergo an operation, the effect of which was that she became a man. She is one of the beings commonly called androgyne, and her case as described by Diodorus (xxxii. Ecl. i. p. 522) must be of interest to medical men. [L.S]