Comparison with 1861 |
|
links between them, but only between each and some extinct and supplanted form. Even on a wide area, which has during a long period remained continuous, and of which the climate
and other conditions of life change insensibly in going
from a district occupied by one species into another district occupied by a closely allied species, we have no just right to expect often to find intermediate varieties in the intermediate zone. For we have reason to believe that only a few species
of a genus ever of a genus ever 1861 1866 1869 1872 |
are 1859 1860 |
undergo undergo 1861 1866 1869 1872 | undergoing 1859 1860 |
change; change; 1861 1866 1869 1872 | change 1859 1860 |
the other species becoming utterly extinct and leaving no modified progeny. the other species becoming utterly extinct and leaving no modified progeny. 1861 1866 1869 1872 |
at any one period; and all changes are slowly effected. 1859 1860 |
Of the species which do change, only a few within the same country change at the same time; and all modifications are slowly effected. I have also shown that the intermediate varieties which will
at first probably
exist
in the intermediate zones, will
be liable to be supplanted by the allied forms on either hand; and
the latter, from existing in greater numbers, will
generally be modified and improved at a quicker rate than the intermediate varieties, which exist
in lesser numbers; so that the intermediate varieties will,
in the long run, be supplanted and exterminated. |
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On this doctrine of the extermination of an infinitude of connecting links, between the living and extinct inhabitants of the world, and at each successive period between the extinct and still older species, why is not every geological formation charged with such links? Why does not every collection of fossil remains afford plain evidence of the gradation
and mutation of the forms of life? Although geological research has undoubtedly revealed the former existence of many links, bringing numerous forms of life much closer together, it does not yield the infinitely many fine graduations
between past and present species required on my
theory; and this is the most obvious and forcible
of the many objections which may be urged against it. ↑1 blocks not present in 1861 1866 1869 1872; present in 1859 1860 | We meet with no such evidence, and this is the most obvious and forcible of the many objections which may be urged against my theory.
|
Why, again, do whole groups of allied species appear, though certainly they
often falsely
appear,
to have come in suddenly on the several
geological stages? Why do we not find great piles of strata beneath the Silurian system, stored with the remains
of the progenitors
of the Silurian groups of
fossils? For
....... 1861 1866 1869 1872 | certainly 1859 1860 |
on my
theory
such
|
links between them, but only between each and some extinct and supplanted form. Even on a wide area, which has during a long period remained continuous, and of which the
climate climate 1859 1860 1861 1866 1869 | climatic 1872 |
and other conditions of life change insensibly in
going going 1859 1860 1861 1866 | proceeding 1869 1872 |
from a district occupied by one species into another district occupied by a closely allied species, we have no just right to expect often to find intermediate varieties in the intermediate
zone. zone. 1859 1860 1861 1866 1869 | zones. 1872 |
For we have reason to believe that only a few species
are are 1859 1860 |
of a genus ever 1861 1866 1869 1872 |
undergoing undergoing 1859 1860 | undergo 1861 1866 1869 1872 |
change change 1859 1860 | change; 1861 1866 1869 1872 |
at any one period; and all changes are slowly effected. at any one period; and all changes are slowly effected. 1859 1860 |
the other species becoming utterly extinct and leaving no modified progeny. 1861 1866 1869 1872 |
↑1 blocks not present in 1859 1860; present in 1861 1866 1869 1872 | Of the species which do change, only a few within the same country change at the same time; and all modifications are slowly effected.
|
I have also shown that the intermediate varieties which
will will 1859 1860 1861 1866 | probably 1869 1872 |
at first
probably probably 1859 1860 1861 1866 | probably 1869 1872 |
exist exist 1859 1860 1861 1866 | existed 1869 1872 |
in the intermediate zones,
will will 1859 1860 1861 1866 | would 1869 1872 |
be liable to be supplanted by the allied forms on either hand;
and and 1859 1860 1861 1866 | for 1869 1872 |
the latter, from existing in greater numbers,
will will 1859 1860 1861 1866 | would 1869 1872 |
generally be modified and improved at a quicker rate than the intermediate varieties, which
exist exist 1859 1860 1861 1866 | existed 1869 1872 |
in lesser numbers; so that the intermediate varieties
will, will, 1859 1860 1861 1866 | would, 1869 1872 |
in the long run, be supplanted and exterminated. |
|
On this doctrine of the extermination of an infinitude of connecting links, between the living and extinct inhabitants of the world, and at each successive period between the extinct and still older species, why is not every geological formation charged with such links? Why does not every collection of fossil remains afford plain evidence of the
gradation gradation 1859 1860 1861 1869 1872 | graduation 1866 |
and mutation of the forms of life?
We meet with no such evidence, and this is the most obvious and forcible of the many objections which may be urged against my theory. Why, again, do whole groups of allied species appear, though
certainly they certainly they 1859 1860 1861 1866 |
this appearance is 1869 1872 |
often
falsely falsely 1859 1860 1861 1866 | false, 1869 1872 |
appear, appear, 1859 1860 1861 1866 | appear, 1869 1872 |
to have come in suddenly on the
several several 1859 1860 1861 1866 | successive 1869 1872 |
geological stages?
Why do we not find great piles of strata beneath the Silurian system, stored with the remains Why do we not find great piles of strata beneath the Silurian system, stored with the remains 1859 1860 1861 |
Although we now know that organic beings appeared on this globe, at a period incalculably remote, long before the lowest bed 1866 1869 1872 |
of the
progenitors progenitors 1859 1860 1861 |
Silurian system was deposited, why do we not find beneath this system great piles of strata stored with the remains 1866 |
Cambrian system was deposited, why do we not find beneath this system great piles of strata stored with the remains 1869 1872 |
of the
Silurian groups of Silurian groups of 1859 1860 1861 |
progenitors of the Silurian 1866 |
progenitors of the Cambrian 1869 1872 |
fossils? For
certainly certainly 1859 1860 | certainly 1861 1866 1869 1872 |
on
my my 1859 1860 1861 1866 | the 1869 1872 |
theory theory 1859 1860 1861 1866 1869 | theory, 1872 |
such
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