the close alliance of some of the inhabitants of the sea in the northern and southern temperate
zones, zones, 1859 1860 1861 | latitudes, 1866 1869 1872 |
though separated by the whole intertropical ocean. Although two
countries countries 1861 1866 1869 1872 | areas 1859 1860 |
may present
....... 1861 1866 1869 1872 | the same 1859 1860 |
physical conditions
as closely similar as the same species ever require, as closely similar as the same species ever require, 1861 1866 1869 1872 |
of life, 1859 1860 |
we need feel no surprise at their inhabitants being widely different, if they have been for a long period completely
sundered sundered 1861 1866 1869 1872 | separated 1859 1860 |
from each other; for as the relation of organism to organism is the most important of all relations, and as the two
countries countries 1861 1866 1869 1872 | areas 1859 1860 |
will have received colonists
from some third source or from each other, from some third source or from each other, 1859 1860 1861 1866 |
OMIT 1869 1872 |
at various periods and in different proportions,
the the 1859 1860 1861 1866 |
from some other country or from each other, the 1869 1872 |
course of modification in the two areas will inevitably
have been have been 1861 1866 1869 1872 | be 1859 1860 |
different. |
|
On this view of migration, with subsequent modification, we
can can 1859 1860 1861 | can 1866 1869 1872 |
see why oceanic islands
should be should be 1859 1860 1861 | are 1866 1869 1872 |
inhabited by
few few 1859 1860 1861 | only few 1866 1869 1872 |
species, but of these,
that that 1859 1860 1861 | why 1866 1869 1872 |
many
should be peculiar. should be peculiar. 1859 1860 1861 |
are peculiar or endemic forms. 1866 1869 1872 |
We
can can 1859 1860 1861 | can 1866 1869 1872 |
clearly see why
those those 1859 1860 1861 |
species of those groups of 1866 |
species belonging to those groups of 1869 1872 |
animals which cannot cross wide spaces of
ocean, ocean, 1859 1860 1861 1866 | the ocean, 1869 1872 |
as frogs and terrestrial mammals,
should should 1859 1860 1861 | do 1866 1869 1872 |
not inhabit oceanic islands; and why, on the other hand, new and peculiar species of bats,
animals which animals which 1861 1866 1869 1872 | which 1859 1860 |
can traverse the ocean,
should so often be should so often be 1859 1860 1861 |
are so often 1866 1869 |
are often 1872 |
found on islands far distant from any continent. Such
facts facts 1859 1860 1861 1866 | cases 1869 1872 |
as the presence of peculiar species of
bats, bats, 1859 1860 1861 1866 | bats 1869 1872 |
and and 1859 1860 1861 1866 |
on oceanic islands, and 1869 |
on oceanic islands and 1872 |
the absence of all other
mammals, on oceanic islands, are mammals, on oceanic islands, are 1859 1860 1861 1866 |
terrestrial mammals, are facts 1869 1872 |
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 parents 1859 1860 1861 1866 | parent-forms 1869 1872 |
formerly inhabited both
areas; areas; 1859 1860 1861 1866 1869 | areas: 1872 |
and we almost invariably find that wherever many closely allied species inhabit two areas, some identical species
common common 1859 1860 1861 1866 |
are still common 1869 1872 |
to
both both 1859 1860 1861 1866 | both. 1869 1872 |
still still 1859 1860 1861 1866 | still 1869 1872 |
exist there. exist there. 1861 1866 | exist. 1859 1860 | exist there. 1869 1872 |
Wherever many closely allied yet distinct species occur,
many many 1859 1860 1861 | many 1866 1869 1872 |
doubtful forms and varieties
of of 1859 1860 1861 1866 | belonging to 1869 1872 |
the same
species species 1859 1860 1861 1866 | groups 1869 1872 |
likewise likewise 1859 1860 1861 1869 1872 | like-wise 1866 |
occur. It is a rule of high generality that the
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