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See page in:
1859
1860
1861
1866
1869
1872

Compare with:
1859
1860
1866
1869
1872

→ 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
→ should be peculiar. 1859 1860 1861
are peculiar or endemic forms. 1866 1869 1872
→ those 1859 1860 1861
species of those groups of 1866
species belonging to those groups of 1869 1872
→ should so often be 1859 1860 1861
are so often 1866 1869
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
→ common 1859 1860 1861 1866
are still common 1869 1872
the close alliance of some of the inhabitants of the sea in the northern and southern temperate
latitudes,
zones,
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 →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
be
have been
different.
On this view of migration, with subsequent modification, we
can
can
see why oceanic islands
are
should be
inhabited by
only few
few
species, but of these,
why
that
many →should be peculiar. We
can
can
clearly see why →those animals which cannot cross wide spaces of
the ocean,
ocean,
as frogs and terrestrial mammals,
do
should
not inhabit oceanic islands; and why, on the other hand, new and peculiar species of bats,
which
animals which
can traverse the ocean, →should so often be found on islands far distant from any continent. Such
cases
facts
as the presence of peculiar species of
bats
bats,
→and the absence of all other →mammals, on oceanic islands, are 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
parent-forms
parents
formerly inhabited both
areas:
areas;
and we almost invariably find that wherever many closely allied species inhabit two areas, some identical species →common to
both.
both
still
still
exist.
exist there.
exist there.
Wherever many closely allied yet distinct species occur,
many
many
doubtful forms and varieties
belonging to
of
the same
groups
species
like-wise
likewise
occur. It is a rule of high generality that the