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Darwin - Descent Of Man
Atec Февраль 16 2008 19:58:54
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. und Phys., 1837, s. 47. I shall often have
to refer to this very curious paper.
*(2) Paget, Lectures on Surgical Pathology, 1853, vol. i., p. 71.
I am informed by Sir James Paget that often several members of a
family have a few hairs in their eyebrows much longer than the others;
so that even this slight peculiarity seems to be inherited. These
hairs, too, seem to have their representatives; for in the chimpanzee,
and in certain species of Maeacus, there are scattered hairs of
considerable length rising from the naked skin above the eyes, and
corresponding to our eyebrows; similar long hairs project from the
hairy covering of the superciliary ridges in some baboons.
The fine wool-like hair, or so-called lanugo, with which the human
foetus during the sixth month is thickly covered, offers a more
curious case. It is first developed, during the fifth month, on the
eyebrows and face, and especially round the mouth, where it is much
longer than that on the head. A moustache of this kind was observed by
Eschricht* on a female foetus; but this is not so surprising a
circumstance as it may at first appear, for the two sexes generally
resemble each other in all external characters during an early
period of growth. The direction and arrangement of the hairs on all
parts of the foetal body are the same as in the adult, but are subject
to much variability. The whole surface, including even the forehead
and ears, is thus thickly clothed; but it is a significant fact that
the palms of the hands and the soles of the feet are quite naked, like
the inferior surfaces of all four extremities in most of the lower
animals
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