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I will now consider the objection that the phenomena of instinct and embryonic development ought not to be ascribed to memory, inasmuch as certain other phenomena of heredity, such as gout, cannot be ascribed to it.
In his excellent work, On the structure of the Heart in the Amphibia , Carl Rabl has shown how easily these curious cenogenetic facts can be explained by the secondary adaptation of the embryonic structure to the great extension of the food-yelk. The embryology of all the other parts of the vascular system also gives us abundant and valuable data for the purposes of phylogeny.
We cannot remember having been in the embryonic stage, but we do not on that account deny that we ever were in such a stage at all. On a little reflection it will appear no more reasonable to maintain that, when we were in the embryonic stage, we did not remember our past existences, than to say that we never were embryos at all.
I have often said that there is no true love short of eating and consequent assimilation; the embryonic processes are but a long course of eating and assimilation the sperm and germ cells, or the two elements that go to form the new animal, whatever they should be called, eat one another up, and then the mother assimilates them, more or less, through mutual inter-feeding and inter-breeding between her and them.
The space of a few blocks covered the council-ground of the Union. Those few acres afforded room enough for the beating of its political heart for twenty-five years, from the embryonic period to that of maturity from the meeting of a consulting committee of subject colonists to the establishment of unchallenged and symmetrical autonomy.
This so called heterocercal tail is only known to exist, as a permanent adult feature, in the sturgeons of to-day. The form of the head and the position of the mouth and eyes in the fishes of the Old Red were also shown to be analogous with embryonic phases of our present fishes.
The purest and most translucent salt water shows under certain luminous rays a multitude of little bodies as restless as the dust motes that dance in shafts of sunlight. These transparent beings mingled with microscopic algae and embryonic mucosities are the plancton.
When, however, these embryonic disorders are once righted, each possible life knows its natural paradise, and what some unintelligent outsider might say in dispraise of that ideal will never wound or ruffle the self-justified creature whose ideal it is, any more than a cat's aversion to water will disturb a fish's plan of life.
Louis Agassiz did herculean work in rearranging and trimming this fossil card index so as to make it conform better, not only to the companion card index of the modern forms of life, but also to that of the embryonic series.
The embryonic wool-coat usually, in the case of the human embryo, covers the whole body, with the exception of the palms of the hands and soles of the feet. These parts are always bare, as in the case of apes and of most other mammals. Sometimes the wool-coat of the embryo has a striking effect, by its colour, on the later permanent hair-coat.
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