Comparison with 1860 |
|
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,
and perhaps at the commencement of the Glacial period, by icebergs. 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
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.
|
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
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
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, 1859 1860 1866 1869 |
mountain- summits, 1861 |
mountain summits, in 1872 |
in in 1859 1860 1861 1866 1869 | in 1872 |
a line gently rising from the
arctic arctic 1859 1860 1861 1866 | Arctic 1869 1872 |
lowlands to a great
height height 1859 1860 1861 1866 | altitude 1869 1872 |
under the equator. The various beings thus left stranded may be compared with savage races of man, driven up and surviving in the
mountain-fastnesses mountain-fastnesses 1859 1860 1861 1866 1869 |
mountain fastnesses of 1872 |
of of 1859 1860 1861 1866 1869 | of 1872 |
almost every land, which serve as a record, full of interest to us, of the former inhabitants of the surrounding lowlands. |
CHAPTER
XII. XII. 1859 1860 1861 1866 1869 | XIII. 1872 |
|
GEOGRAPHICAL DISTRIBUTION—
continued
. |
Distribution of fresh-water productions— On the inhabitants of oceanic islands— Absence of Batrachians and of terrestrial Mammals— On the relation of the inhabitants of islands to those of the nearest mainland— On colonisation from the nearest source with subsequent modification— Summary of the last and present
chapters. chapters. 1859 1860 | chapter. 1861 1866 1869 1872 |
↑Subtitle not present 1859 1860 1861 |
Fresh-water
Productions
.
1866 1869 1872 |
|
AS
lakes and
river-systems river-systems 1859 1860 1861 1866 1869 | river systems 1872 |
are separated from each other by barriers of land, it might have been thought that fresh-water productions would not have ranged widely within the same country, and
as the sea is apparently a still more
impassable impassable 1859 1860 1861 1866 | formidable 1869 1872 |
barrier, that they
never would never would 1859 1860 1861 1866 1869 | would never 1872 |
have extended to distant countries. But the case is exactly the reverse. Not only have many fresh-water species, belonging to
quite quite 1859 1860 1861 1866 1869 | quite 1872 |
different classes, an enormous range, but allied species prevail in a remarkable manner throughout the world.
I well remember, when first collecting in the fresh waters of Brazil, I well remember, when first collecting in the fresh waters of Brazil, 1859 1860 1861 1866 1869 |
When first collecting in the fresh waters of Brazil, I well remember 1872 |
feeling much surprise at the similarity of the fresh-water insects, shells, &c., and at the dissimilarity of the surrounding terrestrial beings, compared with those of Britain. |
|
But
this power in this power in 1859 1860 1861 1866 1869 |
the wide ranging power of 1872 |
fresh-water productions
of ranging widely, though so unexpected, of ranging widely, though so unexpected, 1859 1860 1861 1866 1869 |
OMIT 1872 |
can, I think, in most cases be explained by their having become fitted, in a manner highly useful to them, for short and frequent migrations from pond to pond, or from stream to
stream; stream; 1859 1860 1861 1866 1869 | stream 1872 |
and and 1859 1860 1861 1866 1869 |
within their own countries; and 1872 |
liability to wide dispersal would follow from this capacity as an almost necessary consequence. We can here consider only a few
cases. cases. 1859 1860 1861 1866 1869 |
cases; of these, some of the most difficult to explain are presented by fish. 1872 |
|
Text in this page (from paragraph 200, sentence 210 to paragraph 200, sentence 240, word 9) is not present in 1860 |