suppose that there has been time since the commencement of the
Glacial Glacial 1859 1860 1861 1866 | last Glacial 1869 1872 |
period for their
migration, migration, 1859 1860 1861 1866 | migration 1869 1872 |
and
for their for their 1859 1860 1861 1866 | for their 1869 1872 |
subsequent modification to the necessary degree. The facts seem to
me to me to 1859 1860 1861 1866 1869 | me to 1872 |
indicate that
peculiar and very peculiar and very 1859 1860 1861 1866 |
OMIT 1869 1872 |
distinct species
have have 1859 1860 1861 1866 |
belonging to the same genera have 1869 1872 |
migrated in radiating lines from
some some 1859 1860 1861 1866 | a 1869 1872 |
common centre; and I am inclined to look in the southern, as in the northern hemisphere, to a former and warmer period, before the commencement of the
Glacial Glacial 1859 1860 1861 1866 1869 | last Glacial 1872 |
period, when the
antarctic antarctic 1859 1860 1861 1866 | Antarctic 1869 1872 |
lands, now covered with ice, supported a highly peculiar and isolated flora.
I I 1859 1860 1861 1866 |
It may be 1869 1872 |
suspect suspect 1859 1860 1861 1866 | suspected 1869 1872 |
that before this flora was exterminated
by by 1859 1860 1861 1866 | during 1869 1872 |
the
Glacial Glacial 1859 1860 1861 1866 | last Glacial 1869 1872 |
epoch, a few forms
were were 1859 1860 1861 1866 |
had been already 1869 1872 |
widely dispersed to various points of the southern hemisphere by occasional means of transport, and by the
aid, aid, 1859 1860 1861 1866 1869 | aid 1872 |
as halting-places, of
existing and existing and 1859 1860 1861 | existing and 1866 1869 1872 |
now sunken
islands. islands. 1860 1861 1866 1869 1872 | islands, 1859 |
....... 1860 1861 1866 1869 1872 | and 1859 |
....... 1860 1861 1866 1869 1872 | perhaps 1859 |
....... 1860 1861 1866 1869 1872 | at 1859 |
....... 1860 1861 1866 1869 1872 | the 1859 |
....... 1860 1861 1866 1869 1872 | commencement 1859 |
....... 1860 1861 1866 1869 1872 | of 1859 |
....... 1860 1861 1866 1869 1872 | the 1859 |
....... 1860 1861 1866 1869 1872 | Glacial 1859 |
....... 1860 1861 1866 1869 1872 | period, 1859 |
....... 1860 1861 1866 1869 1872 | by 1859 |
....... 1860 1861 1866 1869 1872 | icebergs. 1859 |
By these means, as I believe, By these means, as I believe, 1859 1860 1861 1866 |
Thus 1869 1872 |
the southern shores of America, Australia,
New Zealand, have New Zealand, have 1860 1861 |
New Zealand have 1859 |
and New Zealand, 1866 |
and New Zealand, might have 1869 |
and New Zealand, may have 1872 |
become become 1859 1860 1861 1869 1872 | became 1866 |
slightly tinted by the same peculiar forms of
vegetable vegetable 1859 1860 1861 1866 | vegetable 1869 1872 |
life. |
|
Sir C. Lyell in a striking passage has speculated, in language almost identical with mine, on the effects of great alternations of climate
on on 1859 1860 1861 1866 |
throughout the world on 1869 1872 |
geographical distribution. ↑1 blocks not present in 1859 1860 1861 1866; present in 1869 1872 | And we have now seen that Mr. Crolls
conclusion that successive Glacial periods in the one hemisphere coincided
with warmer periods in the opposite hemisphere, together with the admission of the slow modification of species, explains a multitude of facts in the distribution of the same and of the allied forms of life in all parts of the globe.
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I believe that the world has recently felt one of his great cycles of change; and that on this view, combined with modification through natural selection, a multitude of facts in the present distribution both of the same and of allied forms of life can be explained. The living waters
may be said to may be said to 1859 1860 1861 1866 |
OMIT 1869 1872 |
have flowed during
one short one short 1859 1860 1861 1866 | certain 1869 | one 1872 |
period period 1859 1860 1861 1866 1872 | periods 1869 |
from the north and
from from 1859 1860 1861 1866 |
afterwards from 1869 |
during another from 1872 |
the south, and
to have crossed at to have crossed at 1859 1860 1861 1866 |
in both cases have reached 1869 1872 |
the
equator; equator; 1859 1860 1861 1866 1869 | equator: 1872 |
but
to have to have 1859 1860 1861 1866 |
the stream of life has 1869 1872 |
flowed with greater force from the
north north 1859 1860 1861 1869 1872 | north, 1866 |
so as to have so as to have 1859 1860 1861 1866 |
than in the opposite direction, and has consequently more 1869 1872 |
freely inundated the south. As the tide leaves its drift in horizontal lines,
though though 1859 1860 1861 1866 | though 1869 1872 |
rising higher on the shores where the tide rises highest, so have the living waters left their living drift on our
mountain- summits, mountain- summits, 1861 |
mountain-summits, 1859 1860 1866 1869 |
mountain summits, in 1872 |
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