CORNUS, an ancient town of Sardinia, of Phoenician origin, on the west coast, 18m. from Tharros, and the same from Bosa. At the time of the second Punic War it is spoken of as the prin cipal city of the district, and its capture by the Romans was the last act in the suppression of the rebellion of 215 B.C. ; it had served as a place of refuge for fugitives after the defeat of the combined forces of rebels and Carthaginians. The site of the ancient acropolis, covered with debris, may still be made out. A necropolis of the Roman period and Phoenician rock-cut tombs may be seen.