| → inherited habit advanced by Lamarck. 1861 1866 |
| Lamarck. 1859 1860 |
| inherited habit, as advanced by Lamarck. 1869 1872 |
|
| → briefly in this chapter 1859 1860 1861 |
| in this chapter briefly 1866 1869 1872 |
|
| → I can see no 1859 1860 1861 1866 |
| there is no real 1869 1872 |
|
| → slight modifications of instinct to any extent, 1859 1860 1861 1866 |
| to any extent slight modifications of instinct which are 1869 1872 |
|
| → has 1859 1860 1861 1866 |
| can be shown to have 1869 1872 |
|
| → but that each 1859 1860 1861 1866 |
| though 1869 1872 |
|
|
against the well-known doctrine of
→inherited habit advanced by Lamarck.
|
|
|
| I have endeavoured
→briefly in this chapter
to show that the mental qualities of our domestic animals vary, and that the variations are inherited. Still more briefly I have attempted to show that
vary slightly in a state of nature. No one will dispute that instincts are of the highest importance to each animal.
→I can see no
difficulty, under changing conditions of life, in natural selection accumulating
→slight modifications of instinct to any extent,
in any
In
cases habit or use and disuse have probably come into play. I do not pretend that the facts given in this chapter strengthen in any great degree my theory; but none of the cases of difficulty, to the best of my judgment, annihilate it. On the other hand, the fact that instincts are not always absolutely perfect and are liable to mistakes;— that no instinct
→has
been produced for the
good of other animals,
→but that each
advantage of the instincts of others;— that the
in natural history, of
non facit
is applicable to instincts as well as to corporeal structure, and is plainly explicable on the foregoing views, but is otherwise inexplicable,— all tend to corroborate the theory of natural selection. |
|
| This theory
strengthened by some few other facts in regard to instincts; as by that common case of closely allied, but
distinct, species, when inhabiting distant parts of the world and living under considerably different conditions of life, yet often retaining nearly the same instincts. For instance, we can
on the principle of inheritance, how it is that the thrush of
America lines its nest with mud, in the same
|
