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It lays eggs in an underground nest two eggs at a time, which are like the eggs of birds, inasmuch as they contain not only the protoplasm from which the embryo is formed, but also the "yolk." on which the embryo feeds until hatched. After the young Duck-bill is hatched, it feeds from teatless glands in the mother's body, the milk being furnished by the mother by a peculiar process.
What should we say to a method of being suckled by the mere application of the mouth to a teatless breast? What we see here may be compared with that: without any outlet, the milk of the Chalicodoma grub passes into the stomach of the Anthrax' larva. Is it really an instance of endosmosis?
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