It has been stated that with the addition of pottery the Cochise Culture became the Mogollon. The idea is not new. Although the first reports on the Mogollon (Gladwin 1934, 1935. 1936; Haury 1936b) visualized them as intruders into the Southwest from an eastern source, by 194-1 tn e idea was being expressed that there was a genetic connection between the prepottery Cochise and the later Mogollon. Haury (1941: 130) suggested that pottery, house building, earth burial, agriculture, and a few minor traits added to San Pedro Stage was the beginning of the Mogollon. Sayles (Sayles and Antevs 194-1:61) suggested that the introduction of pottery terminated the last stage of Cochise. McGregor (1941:189) also proposed this sequence. The excavation of Ventana Cave led Haury (1943) to suggest that Hohokam, as well as Mogollon, had its source in Cochise. In Ventana Cave Haury (1950) detailed the transition for the Hohokam.