| → mocking thrush of 1869 |
| mocking-thrush 1859 1860 1861 1866 1872 |
|
| → and young birds hatched, 1869 1872 |
| there 1859 1860 1861 1866 |
|
| → species of land-shells, 1869 1872 |
| land-shells, 1859 1860 1861 1866 |
|
| → OMIT 1869 |
| In many other instances, as in the several districts of the same continent, 1859 1860 1861 1866 |
| On the same continent, 1872 |
|
| → the species which inhabit different districts with nearly 1869 1872 |
| species under 1859 1860 1861 1866 |
|
| → physical conditions on the same continent. 1869 |
| conditions of life. 1859 1860 1861 1866 |
| physical conditions. 1872 |
|
| → plants. 1859 1860 1861 1866 1869 |
| plants; so it is, according to Mr. Bates, with the butterflies and other animals inhabiting the great, open, and continuous valley of the Amazons. 1872 |
|
| → same principle which governs 1869 1872 |
| principle which determines 1859 1860 1861 1866 |
|
| → inhabitants 1869 1872 |
| fauna and flora 1859 1860 1861 1866 |
|
|
mocking-thrush, each confined to its own island. Now let us suppose the
→mocking thrush of
Chatham Island to be blown to Charles Island, which has its own
why should it succeed in establishing itself there? We may safely infer that Charles Island is well stocked with its own species, for annually more eggs are laid
→and young birds hatched,
than can possibly be reared; and we may infer that the mocking-thrush peculiar to Charles Island is at least as well fitted for its home as is the species peculiar to Chatham Island. Sir C. Lyell and Mr. Wollaston have communicated to me a remarkable fact bearing on this subject; namely, that
and the adjoining islet of Porto Santo possess many distinct but representative
→species of land-shells,
some of which live in crevices of stone; and although large quantities of stone are annually transported from Porto Santo to
yet this latter island has not become colonised by the Porto Santo species: nevertheless both islands have been colonised by
European land-shells, which no doubt had some advantage over the indigenous species. From these considerations I think we need not greatly marvel at the endemic
which inhabit the several islands of the Galapagos Archipelago, not having
spread from island to island.
→OMIT
has
played an important part in checking the commingling of
→the species which inhabit different districts with nearly
the same
→physical conditions on the same continent. Thus, the south-east and south-west corners of Australia have nearly the same physical conditions, and are united by continuous land, yet they are inhabited by a vast number of distinct mammals, birds, and
→plants.
|
|
| The
→same principle which governs
the general character of the
→inhabitants
of oceanic islands,
|
