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1859
1860
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1866
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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

OMIT 1869 1872
from some third source or from each other, 1859 1860 1861 1866

from some other country or from each other, the 1869 1872
the 1859 1860 1861 1866

are peculiar or endemic forms. 1866 1869 1872
should be peculiar. 1859 1860 1861

species belonging to those groups of 1869 1872
those 1859 1860 1861
species of those groups of 1866

are so often 1866 1869
should so often be 1859 1860 1861
are often 1872

on oceanic islands, and 1869
and 1859 1860 1861 1866
on oceanic islands and 1872

terrestrial mammals, are facts 1869 1872
mammals, on oceanic islands, are 1859 1860 1861 1866

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
zones,
latitudes,
though separated by the whole intertropical ocean. Although two
areas
countries
may present
the same
....
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
separated
sundered
from each other; for as the relation of organism to organism is the most important of all relations, and as the two
areas
countries
will have received colonists OMIT at various periods and in different proportions, from some other country or from each other, the course of modification in the two areas will inevitably
be
have been
different.
On this view of migration, with subsequent modification, we
can
....
see why oceanic islands
should be
are
inhabited by
few
only few
species, but of these,
that
why
many are peculiar or endemic forms. We
can
....
clearly see why species belonging to those groups of animals which cannot cross wide spaces of
ocean,
the ocean,
as frogs and terrestrial mammals,
should
do
not inhabit oceanic islands; and why, on the other hand, new and peculiar species of bats,
which
animals which
can traverse the ocean, are so often found on islands far distant from any continent. Such
facts
cases
as the presence of peculiar species of
bats,
bats
on oceanic islands, and the absence of all other terrestrial mammals, are facts utterly inexplicable on the theory of independent acts of creation.
The existence of closely allied or representative species in any two areas, implies, on the theory of descent with modification, that the same
parents
parent-forms
formerly inhabited both
areas:
areas;
and we almost invariably find that wherever many closely allied species inhabit two