. The brain in hominid evolution. Human evolution; Brain; Fossil hominids. = = 364 Figure 17: The biparietal partial endocast of Olduvai hominid 7 (type specimen of Homo habilis), with outside values for the range of esti- mates of the total capacity. The figure of per cent is based on Australopithecus boisei; that of per cent is based on the Taung endocast of Australopithecus africanus. Percentages for the Trinil and Choukoutien II specimens lay between these 2 values. The central value for Olduvai hominid 7 is 657 and the estimate fo
. The brain in hominid evolution. Human evolution; Brain; Fossil hominids. = = 364 Figure 17: The biparietal partial endocast of Olduvai hominid 7 (type specimen of Homo habilis), with outside values for the range of esti- mates of the total capacity. The figure of per cent is based on Australopithecus boisei; that of per cent is based on the Taung endocast of Australopithecus africanus. Percentages for the Trinil and Choukoutien II specimens lay between these 2 values. The central value for Olduvai hominid 7 is 657 and the estimate for the "adult value" 684 struction yielded 5 values ranging from 362 to 364 , with a mean of ; the endocast based on the second reconstruction yielded 5 values ranging from 362 to 365 , with a mean of The validity of the method was demonstrated entirely independently by Dr. R. L. Holloway, working in the Anthropology Department of Colum- bia University, New York City. His work answered the criticism (voiced, for example, by Pilbeam and Simons 1965 *) that any variation in the angle between the 2 parietals would seriously affect the volume of the space enclosed beneath them. His experiments led him to state: It is immediately apparent that variations in the articulation angle along the suture do not radically reduce volume estimates. In varying the articulation angle, the decrease essentially affects but one dimension, that is, the lateral breadth. At * For example: "The slightest mis-setting of the two at the midline, for instance if flared too much laterally, would markedly increase the brain volume estimate for this individual" (Pilbeam and Simons 1965, p. 250). 65 K. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Tobias, Phillip V. New York : Columbia Uni
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Keywords: ., boo, bookcentury1900, booksubjectbrain, booksubjecthumanevolution
