| On these same
we can understand, as I have endeavoured to show, why oceanic islands should have few inhabitants, but
a
should be endemic or peculiar; and why, in relation to the means of migration, one group of
→even within the same class,
should have all its species
and another
→should
have all its species
→common to other
of the world. We can see why whole groups of organisms, as batrachians and terrestrial mammals, should be absent from oceanic islands, whilst the most isolated islands
their own peculiar species of
mammals or bats. We can see
→there
should be some relation between the
→of
mammals, in a more or less modified
→in islands, and
the depth of the sea between
and the mainland. We can clearly see why all the inhabitants of an archipelago, though specifically distinct on the several islets, should be closely related to each
and
be related, but less closely, to those of the nearest
or other source whence immigrants
→had probably
We can see
→in
two areas, however distant from each other,
→there should be a correlation, in the presence of
identical
→of varieties, of doubtful species, and of distinct but representative species.
|
