I will here notice a few miscellaneous objections which have been advanced against my views, as some of the previous discussions may perhaps thus be made
clearer; but it would be useless to discuss all of them, as many have been made by writers who have not taken the trouble to understand my views. | clearer; but it would be useless to discuss all of them, as many have been made by writers who have not taken the trouble to understand my views. 1869 |
| clearer. 1861 |
| clearer; but it would be useless to discuss all of them, as they have been made by writers who have not taken the trouble to understand my views. 1866 |
| OMIT 1869 |
| under which they live, 1866 |
| in many quarters of the world yielding their places 1869 |
| yielding their places in many quarters of the world 1866 |
| foreigners which have become naturalised. 1869 |
| and naturalised foreigners. 1866 |
| they were at 1869 |
| at 1866 |
| unless they likewise change; and 1869 |
| and 1866 |
| 4 blocks not present in 1859 1860 1861 1869 1872; present in 1866 | | Thus again, a French author, in opposition to the whole tenor of this volume, assumes that, according to my view, species undergo great and abrupt changes, and then he triumphantly asks how this is possible, seeing that such modified forms would be crossed by the many which have remained unchanged.
No doubt the small changes or variations which do occur are incessantly checked and retarded by intercrossing; but the frequent existence of varieties in the same country with the parent species shows that crossing does not necessarily prevent their formation; and in the still more frequent cases of local forms or geographical races, crossing cannot come into play.
It should also be borne in mind that the offspring from a cross between a modified and unmodified species tends partially to inherit the characters of both parents, and natural selection assuredly will preserve even slight approaches to any change of structure which is beneficial.
Moreover such crossed offspring, from partaking of the same constitution with the modified parent, and from being still exposed to the same conditions, will be far more liable than other individuals of the same species again to vary or be modified in a similar manner.
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| any other 1866 1869 | | other 1861 |
|
