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If we suppose that the ancient progenitor, the archetype as it may be called, of all mammals, had its limbs constructed on the existing general pattern, for whatever purpose they served, we can at once perceive the plain signification of the homologous construction of the limbs throughout the whole class.
Distinct species present analogous variations; and a variety of one species often assumes some of the characters of an allied species, or reverts to some of the characters of an early progenitor. These propositions will be most readily understood by looking to our domestic races.
I have since observed that he was only a degree worse than many other clerical readers, and that a strange and delightfully mistaken notion seems prevalent that the Bible must be read in a dreary and unnatural tone of voice, or with a sort of mournful monotony; it is intended as a sort of reverence, but I suspect that it often plays into the hands of my progenitor, as it most assuredly did in the present instance.
On the principle of the multiplication and gradual divergence in character of the species descended from a common progenitor, together with their retention by inheritance of some characters in common, we can understand the excessively complex and radiating affinities by which all the members of the same family or higher group are connected together.
The horrid suspicion, too, countenanced by his abode in the corner of the graveyard, affording the terrible Doctor such facilities for making free, like a ghoul as he was, with the relics of mortality from the earliest progenitor to the man killed yesterday by the Doctor's own drugs, was not likely to improve his reputation.
Is it bad to wish to possess a beautiful girl? I fancy I have that part of my nature by inheritance. My amiable progenitor was, in this respect, something of a rascal, as someone says of the pious AEneas.
Thus, as it seems to me, the leading facts in embryology, which are second in importance to none in natural history, are explained on the principle of slight modifications not appearing, in the many descendants from some one ancient progenitor, at a very early period in the life of each, though perhaps caused at the earliest, and being inherited at a corresponding not early period.
We have seen in a former chapter that when young animals belonging to any class follow nearly the same habits of life as their parents, and yet are coloured in a different manner, it may be inferred that they have retained the colouring of some ancient and extinct progenitor.
We believe that, for many years, no remnant of it has existed in the United States. Gratio Kelleia was not the progenitor of a race of six-fingered men, as Seth Wright's ram became a nation of Ancon sheep, though the tendency of the variety to perpetuate itself appears to have been fully as strong in the one case as in the other. And the reason of the difference is not far to seek.
Whole families of feeble-minded people, on the strength of an ancestor who achieved distinction a hundred years ago, live in constant thanksgiving that they "are not as other men." None of the great man's descendants have done anything to be particularly proud of since their remote progenitor signed the Declaration of Independence or governed a colony.
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