An ear of fossil maize (Zea antiqua) compared with existing South American types. Nos. 1, 2 and 3, different aspects of the fossil ear; No. 4, a Bolivian variety from high altitudes; Nos. 5 and 6, a Peruvian popcorn from Ollantaytambo; Nos. 7 and 9, Copacabana variety from near Lake Titicaca; No. 8, a Peruvian variety called Granada.