Thus the evidence given by those five new thigh bones of the morphological and functional distinctness of Pithecanthropus erectus furnishes proof, at the same time, of its close affinity with the gibbon group of anthropoid apes.

Thus the evidence given by those five new thigh bones of the morphological and functional distinctness of Pithecanthropus erectus furnishes proof, at the same time, of its close affinity with the gibbon group of anthropoid apes.