CAYUVAVAN, a linguistic stock of South American Indians comprising but a single tribe. The validity of this stock is doubt ful. The Cayuvavas formerly lived in northern Bolivia on and west of the Mamore river for some 6om. above its confluence with the Guapore. The surviving remnants are now mainly settled at the mission of Exaltation de Santa Cruz. The Indians of this group were sedentary agriculturists, and known as the best canoe men of the region. They appear to have retained little of their old culture and, like many of the tribes of this area, are very little known.
See A. D'Orbigny, L'Homme Americain (Paris, 1839).