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The Descent of Man

The Descent of Man

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sionally to become so well developed during<br />

maturity as to yield a fair supply <strong>of</strong> milk. Now<br />

if we suppose that during a former prolonged<br />

period male mammals aided the females in<br />

nursing their <strong>of</strong>fspring (31. Mlle. C. Royer has<br />

suggested a similar view in her 'Origine de<br />

l'homme,' etc., 1870.), and that afterwards from<br />

some cause (as from the production <strong>of</strong> a smaller<br />

number <strong>of</strong> young) the males ceased to give this<br />

aid, disuse <strong>of</strong> the organs during maturity<br />

would lead to their becoming inactive; and<br />

from two well-known principles <strong>of</strong> inheritance,<br />

this state <strong>of</strong> inactivity would probably be<br />

transmitted to the males at the corresponding<br />

age <strong>of</strong> maturity. But at an earlier age these organs<br />

would be left unaffected, so that they<br />

would be almost equally well developed in the<br />

young <strong>of</strong> both sexes.<br />

CONCLUSION.

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