The geologic history of Arizona can be found in the record of its rocks, the five periods of geologic time, the Younger Precambrian, the Older Precambrian, the Paleozoic, the Mesozoic and the Cenozoic tell the story of Arizona's past. Part of the story they relate is the ancient lifeforms of the state. Long before man discovered the New World for the first time life was abundant, there were ground sloths, camels, bison and when an ancient sea ruled part of the state there were mollusks, jellyfish and other forms of marine life. This bibliography is meant to be used as a guide to some of the literature on the ancient life of Arizona. It is not a comprehensive listing, but it is the most complete bibliography on this topic to date and as such will be useful to both students of geology and geologists. (46 pages)