| → generally are the 1866 |
| will generally be 1859 1860 1861 |
| are the 1869 1872 |
|
| → and in the northern and southern temperate zones; 1866 1869 1872 |
| under the most different climates; 1859 1860 1861 |
|
| → as closely similar as the same species ever require, 1861 1866 1869 1872 |
| of life, 1859 1860 |
|
| → from some third source or from each other, 1859 1860 1861 1866 |
| OMIT 1869 1872 |
|
| → the 1859 1860 1861 1866 |
| from some other country or from each other, the 1869 1872 |
|
| → are peculiar or endemic forms. 1866 1869 1872 |
| should be peculiar. 1859 1860 1861 |
|
| → species of those groups of 1866 |
| those 1859 1860 1861 |
| species belonging to those groups of 1869 1872 |
|
| → are so often 1866 1869 |
| should so often be 1859 1860 1861 |
| are often 1872 |
|
| → and 1859 1860 1861 1866 |
| on oceanic islands, and 1869 |
| on oceanic islands and 1872 |
|
| → mammals, on oceanic islands, are 1859 1860 1861 1866 |
| terrestrial mammals, are facts 1869 1872 |
|
|
of the inhabitants within each great class are plainly related; for they
→generally are the
descendants of the same progenitors and early colonists. On this same principle of former migration, combined in most cases with modification, we can understand, by the aid of the Glacial period, the identity of some few plants, and the close alliance of many others, on the most distant mountains,
→and in the northern and southern temperate zones;
and likewise the close alliance of some of the inhabitants of the sea in the northern and southern temperate
though separated by the whole intertropical ocean. Although two
may present
physical conditions
→as closely similar as the same species ever require,
we need feel no surprise at their inhabitants being widely different, if they have been for a long period completely
from each other; for as the relation of organism to organism is the most important of all relations, and as the two
will have received colonists
→from some third source or from each other,
at various periods and in different proportions,
→the
course of modification in the two areas will inevitably
different. |
|
| On this view of migration, with subsequent modification, we
see why oceanic islands
inhabited by
species, but of these,
many
→are peculiar or endemic forms. We
clearly see why
→species of those groups of
animals which cannot cross wide spaces of
as frogs and terrestrial mammals,
not inhabit oceanic islands; and why, on the other hand, new and peculiar species of bats,
can traverse the ocean,
→are so often
found on islands far distant from any continent. Such
as the presence of peculiar species of
→and
the absence of all other
→mammals, on oceanic islands, are
utterly inexplicable on the theory of independent acts of creation.
|
