This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1875 edition. Excerpt: ...Granting, then, as material for the process, a few of the more ancient end lower forms of life, as, for example, the old Eozoon of the Laurentian, or a few mollusks and crustaceans of the Primordial, have we any evidence that out of these the remainder of the animal kingdom has been evolved? I take the animal ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1875 edition. Excerpt: ...Granting, then, as material for the process, a few of the more ancient end lower forms of life, as, for example, the old Eozoon of the Laurentian, or a few mollusks and crustaceans of the Primordial, have we any evidence that out of these the remainder of the animal kingdom has been evolved? I take the animal kingdom because in it the record is more varied and complete. A difficulty meets us here at the outset, with reference to the precise nature of the question with which we have to do. It is that as to the distinction between species and varieties. Species of animals are supposed to be separated from each other by well-marked lines of difference, and they have not the power of so intermixing with each other as to produce continuously fertile progeny. They stand thus as units in our systems of natural-history classification. But species are more or less variable under the influence of external conditions, and the varieties so formed may or may not be true species. I say " may not; " for, though I believe that they are not, the derivationist tries to break down the line between species and varieties. It results from this that there may be different views as to the limits of species. Man himself has, for example, been broken down into different species; while by most naturalists the diversities of men are regarded as of the nature of races and varieties. The best British naturalists of our day have usually held to large specific aggregates; the continental naturalists, like your own Agassiz and his disciples in this country, have been in the habit of naming as a distinct species every slightly different form. This is still an unsettled point, though I think the error has been rather in making too many species than two. few, the...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
