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| | Charles Darwin : Origin of Species : Distinct species present analogous variations, so that a variety of one species ... |
 | | I presume that no one will doubt that all such analogous variations are due to the several races of the pigeon having inherited from a common parent the same constitution and tendency to variation, when acted on by similar unknown influences. |
 | | With pigeons, however, we have another case, namely, the occasional appearance in all the breeds, of slaty-blue birds with two fl bars on the wings, white loins, a bar at the end of the tail, with the outer feathers externally edged near their bases with white. |
 | | But the best evidence of analogous variations is afforded by parts or organs which are generally constant in character, but which occasionally vary so as to resemble, in some degree, the same part or organ in an allied species. |
| www.classicreader.com /read.php/sid.2/bookid.107/sec.42 (2044 words) |
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