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Updated: May 24, 2025
Admittedly, the drawings illustrating Highmore's observations upon generation are, to use a word often applied to modern art, "interesting," but they do derive from actual observations of developing plant and animal embryos. His observations on the developing chick embryo are quite full, complete, and exact, and he also records some interesting facts regarding development of plant seeds.
So we, at six or seven years old, have no recollection of ever having been infants, much less of having been embryos; but the manner in which we shed our teeth and make new ones, and the way in which we grow generally, making ourselves for the most part exceedingly like what we made ourselves, in the person of some one of our nearer ancestors, and not unfrequently repeating the very blunders which we made upon that occasion when we come to a corresponding age, proves most incontestably that we remember our past existences, though too utterly to be capable of introspection in the matter.
From such special adaptations, the similarity of the larvae or active embryos of allied animals is sometimes much obscured; and cases could be given of the larvae of two species, or of two groups of species, differing quite as much, or even more, from each other than do their adult parents.
When the Moon-forces, before the separation of the moon from the earth, tended more and more to harden the latter, it happened that among the descendants of the embryos left behind upon the earth by man, there were some in whom human souls returning from the disembodied state could no longer incarnate in consequence of the Moon-forces.
There is something unborn about them, like embryos in an early stage. But if I whirl them about, they are miracles of fulfillment. Here are fungi of every sort, mushrooms and puffballs. How close is the poisonous mushroom to the happy family of the edible mushroom, and how innocently it stands there! Yet it is deadly. What magnificent cunning!
The egg has no nutritive cells; the formation of the primitive band, usually the first indication of the germ, is retarded till the second larval stage is attained; and the embryonal membrane is not homologous with the so-called "amnion" of other insects, but may possibly be compared with the skin developed on the upper side of the low, worm-like acarian, Pentastomum, and the "larval skin" of the embryos of many low Crustacea.
I look upon them as simply the embryos of mature forms, which are capable of propagating themselves in this embryonal state. I have observed these forms in many diseased conditions; many of them in one disease are nothing but the vinegar yeast developing, away from the air, in the blood where the full development of the plant is not apt to be found.
And unto Vinata also, Kasyapa said, 'Be it so! Then Vinata, having; obtained her prayer, rejoiced greatly. Obtaining two sons of superior prowess, she regarded her boon fulfilled. Kadru also obtained her thousand sons of equal splendour. 'Bear the embryos carefully, said Kasyapa, and then he went into the forest, leaving his two wives pleased with his blessings.
And unto Vinata also, Kasyapa said, 'Be it so! Then Vinata, having obtained her prayer, rejoiced greatly. Obtaining two sons of superior prowess, she regarded her boon fulfilled. Kadru also obtained her thousand sons of equal splendour. 'Bear the embryos carefully, said Kasyapa, and then he went into the forest, leaving his two wives pleased with his blessings.
The embryos, also, of distinct animals within the same class are often strikingly similar: a better proof of this cannot be given, than a circumstance mentioned by Agassiz, namely, that having forgotten to ticket the embryo of some vertebrate animal, he cannot now tell whether it be that of a mammal, bird, or reptile.
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