List of maps and text-figures page ............................. vi
List of plates ................................................ vii
Introductory Note .............................................. ix
Foreword by Professor G. Gaylord Simpson ....................... xi
Introduction ................................................. xiii
I The general geological evidence ............................ 1
II Review of earlier reports on the fauna ..................... 7
III Mammalian fauna: other than Bovidae ....................... 12
IV Mammalian fauna: Bovidae .................................. 37
V Non-mammalian fauna ....................................... 70
VI Review of the faunal evidence ............................. 73
VII The problems of the climatic sequence ..................... 79
VIII Dating by the potassium-argon technique ................... 86
IX Note on fossil human discoveries and cultural evidence .... 92
Appendix 1 Preliminary notes on the stratigraphy of Beds
I-IV, Olduvai Gorge, Tanganyika, by Dr Richard L. Hay ..... 94
Appendix 2 Descriptive list of the named localities in
Olduvai Gorge, by M.D. Leakey ............................ 101
References .................................................... 108
Index ......................................................... 115
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