Papers originally presented at A.N.U. Seminars, October - December 1968; includes; 1) Sea level changes and land links - J.N. Jennings, 2) Evidence for late Quaternary climates - R.W. Galloway, 3) Vegetation, soils and climate in late Quaternary southeastern Australia - A.B. Costin, 4) River systems and climatic changes in southeastern Australia - Simon Pels, 5) Pleistocene salinities and climatic change; evidence from lakes and lunettes in southeastern Australia - J.M. Bowler, 6) The Australian arid zone as a prehistoric environment - J.A. Mabbutt, 7) Man, fauna and climate in Aboriginal Australia - J.H. Calaby, 8) Cave sediments as palaeoenvironmental indicators, and the sedimentary sequence in Koonalda Cave - R. Frank, 9) The archaeology of Koonalda Cave - R.V.S. Wright, 10) Coastal Aborigines of southeastern Australia - R.J. Lampert, 11) Prehistory in the Cape York Peninsula - R.V.S. Wright, 12) Man and environment in northwest Arnhem Land - Carmel White, 13) Prehistoric research in Timor - I.C. Glover, 14) New Guinea and Australian prehistory - J.P. White, 15) Australian Aboriginal food plants; some ecological and culture-historical implications - J. Golson, 16) Open sites and the ethnographic approach to the archaeology of hunter-gatherers, 17) Habitat and economy; a historical perspective - R. Lawrence, 18) Arid region Aborigines; the Pintubi - J.P.M. Long, 19) The demography of hunters and farmers in Tasmania - R. Jones, 20) Changes in the Aboriginal population of Victoria, 1863-1966 - Diane E. Barwick, 21) The racial affinities and origins of the Australian Aborigines - A.G. Thorne, 22) Genetic evidence and its implications for Aboriginal prehistory - R.L. Kirk, 23) Linguistic evidence and Aboriginal origins - D.T. Tryon, 24) Art and Aboriginal prehistory - R. Edwards, 25) Aboriginal social evolution; a retrospective view - D.J. Mulvaney.