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SINCE Dr. and Mrs. L. S. B. Leakey discovered that the Oldowan pebble tool-maker in Tanganyika was an Australopithecine (Zinjanthropus boisei)1, I have been frequently asked whether this development has any bearing on the unsolved problem of the Kanam mandible which was recovered by Dr. Leakey in 1932 from deposits in Kenya apparently at the same cultural horizon as the newly discovered Olduvai skull. The Kanam mandible was referred to Homo kanamensis sp. nov.2 and is preserved in the British Museum (Natural History).
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