BANAS or BUNAS, the name of three rivers of India: (I) a river of Rajputana, which rises in the Aravalli range in Udaipur, drains the Udaipur val ley, and after a course of 3oom. flows into the Chambal; (2) a river of the Shahabad district of Bengal, which forms the drainage channel between the Arrah canal and the Sone canals system, and finally falls into the Gangi nadi; (3) a river of Chota Nagpur in Bengal, which rises in the state of Chang Bhakar and falls into the Sone near Rampur.