The Descent of Man

lies; and this will tend to keep up or even increase
their mental powers, and, as a consequence,
the present inequality between the
sexes. (26. An observation by Vogt bears on this
subject: he says, "It is a remarkable circumstance,
that the difference between the sexes, as
regards the cranial cavity, increases with the
development of the race, so that the male European
excels much more the female, than the
negro the negress. Welcker confirms this statement
of Huschke from his measurements of
negro and German skulls." But Vogt admits
('Lectures on Man,' Eng. translat. 1864, p. 81)
that more observations are requisite on this
point.
VOICE AND MUSICAL POWERS.
In some species of Quadrumana there is a great
difference between the adult sexes, in the power
of their voices and in the development of
the vocal organs; and man appears to have in-