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Figure 20: Three views of part of the reconstructed vault of the cranium 

 of Olduvai hominid 13 (paratype of Homo habilis), and the artificial 

 parieto-occipital partial endocast made by R. J. Clarke. Additional, 

 articulating fragments of the calvaria are available but, because of their 

 irregularity of outline, were not employed in the exercise to estimate 

 the capacity of the calvaria. 



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