18.01.2013 Views

The Descent of Man

The Descent of Man

The Descent of Man

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

y the locomotive power <strong>of</strong> the antherozooids.<br />

With lowly-organised aquatic animals, permanently<br />

affixed to the same spot and having their<br />

sexes separate, the male element is invariably<br />

brought to the female; and <strong>of</strong> this we can see<br />

the reason, for even if the ova were detached<br />

before fertilisation, and did not require subsequent<br />

nourishment or protection, there would<br />

yet be greater difficulty in transporting them<br />

than the male element, because, being larger<br />

than the latter, they are produced in far smaller<br />

numbers. So that many <strong>of</strong> the lower animals<br />

are, in this respect, analogous with plants. (21.<br />

Pr<strong>of</strong>. Sachs ('Lehrbuch der Botanik,' 1870, S.<br />

633) in speaking <strong>of</strong> the male and female reproductive<br />

cells, remarks, "verhalt sich die eine bei<br />

der Vereinigung activ,…die andere erscheint<br />

bei der Vereinigung passiv.") <strong>The</strong> males <strong>of</strong> affixed<br />

and aquatic animals having been led to<br />

emit their fertilising element in this way, it is<br />

natural that any <strong>of</strong> their descendants, which<br />

rose in the scale and became locomotive,

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!