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Updated: May 23, 2025
The full grown larva of the Regalis moth, of the Southern and Middle states, is very similarly ornamented. It is an embryonic form, and therefore inferior in rank to the Tau moth. Multiply these horns over the surface of the body, lessen their size, and crown them with hairs, and we have our Io moth, so destructive to corn.
What then does an impartial survey of the positively ascertained truths of paleontology testify in relation to the common doctrines of progressive modification, which suppose that modification to have taken place by a necessary progress from more to less embryonic forms, or from more to less generalized types, within the limits of the period represented by the fossiliferous rocks?
We should expect some such correspondence from the fact already stated that the embryonic development of the individual is a brief recapitulation of the ancestral development of the species or larger group. The egg of the lowest vertebrate, amphioxus, shows these changes in a simple and apparently primitive form.
They have no tail, or rather its rudiments are concealed beneath the skin. These include the gibbon, the orang, the gorilla, and the chimpanzee. We can sum up the few attainments of mammals in a line. The lower forms attained the placental mode of embryonic development; the higher attained upright gait, hands and feet, and a great increase of brain.
There, if anywhere, should be the embryonic conditions which will ripen one day into a mighty civil growth. A wife's devotion, the purity of a sister's and a daughter's love, the smiles and tears and prayers of a mother these make the sunshine which transforms the waste into a paradise, the wild into a garden, and expands the home by a law of organic growth into a well ordered community.
In what sense can 'Loligo' or 'Spirula' be said to be more specialized, or less embryonic, than 'Belemnites'; or the modern species of Lamellibranch and Gasteropod genera, than the Silurian species of the same genera?
Needham's approach and goals are more dynamic than those of Browne, and he attempts to analyze various embryonic fluids by coagulation and distillation procedures.
Maurice could never understand why he resisted the impulse to tell the whole affair. A dozen words to the man at his side, and the catastrophes, even embryonic, would be averted. "You must tell me who most of these people are," he said, in order to get around a disagreeable subject. "I am a total stranger." "With pleasure.
The same fact holds good with flowering plants, of which the two main divisions have been founded on characters derived from the embryo, on the number and position of the embryonic leaves or cotyledons, and on the mode of development of the plumule and radicle.
While these powers are in their earlier, so to speak embryonic, stages of development, they can be fostered and increased or retarded. They are still plastic. Very early in a child's life acquisitiveness shows itself; he begins to say "I," and "mine," and desires things to be his "very own." And this can be fostered so that the child will grow up a "covetous machine."
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