... apophyses and ridges for the attachment of muscles are less pronounced,... the forehead is ... more perpendicular, to such a degree that in a group of skulls those of the two sexes have been mistaken for different types; the superciliary ridges and the glabella are less developed, often not at all; the crown is higher and more horizontal; the brain weight and cranial capacity are less; the mastoid apophyses, the inion, the styloid apophyses, and the condyles of the occipital are of less volume, the ... — Sex and Society • William I. Thomas
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