Comparison with 1866 |
|
which any great group of marine animals might be multiplied; and here they would remain confined, until some of the species became adapted to a cooler climate, and were enabled to double the southern
capes of Africa or Australia, and thus reach other and distant seas. |
|
From these
and similar considerations, but chiefly and similar considerations, but chiefly 1859 1860 1861 1866 |
considerations, 1869 1872 |
from our ignorance of the geology of other countries beyond the confines of Europe and the United
States; States; 1859 1860 1861 1866 | States, 1869 1872 |
and from the revolution in our palæontological
ideas on many points, which ideas on many points, which 1859 1860 1861 1866 |
knowledge effected by 1869 1872 |
the discoveries of
even even 1859 1860 1861 1866 | even 1869 1872 |
the last dozen
years years 1859 1860 1861 1866 | years, 1869 1872 |
have effected, have effected, 1859 1860 1861 1866 | have effected, 1869 1872 |
it seems to me to be about as rash
in us in us 1859 1860 1861 1866 | in us 1869 1872 |
to dogmatize on the succession of organic
beings beings 1859 1860 1861 1866 | forms 1869 1872 |
throughout the world, as it would be for a naturalist to land for five minutes on
some one some one 1859 1860 1861 1866 | a 1869 1872 |
barren point in Australia, and then to discuss the number and range of its productions. |
On
the
sudden
appearance
of
groups
of
Allied
Species
in
the
lowest
known
fossiliferous
strata
.— |
There is another and allied difficulty, which is much graver. I allude to the manner in which
numbers of species numbers of species 1859 1860 1861 1866 |
many species in several 1869 |
species belonging to several 1872 |
of the
same group same group 1866 |
same group, 1859 1860 1861 |
main divisions of the animal kingdom 1869 1872 |
suddenly appear in the lowest known fossiliferous rocks. Most of the arguments which have convinced me that all the existing species of the same group
have have 1859 1860 1861 1866 | are 1869 1872 |
descended from
one one 1859 1860 1861 1866 | a single 1869 1872 |
progenitor, apply with nearly
equal force to the earliest known species. For instance,
I I 1859 1860 1861 1866 | it 1869 1872 |
cannot
doubt doubt 1859 1860 1861 1866 | be doubted 1869 1872 |
that all the
Silurian trilobites have Silurian trilobites have 1859 1860 1861 1866 |
Silurian trilobites are 1869 |
Cambrian and Silurian trilobites are 1872 |
descended from some one crustacean, which must have lived long before the Silurian
age, and which probably differed greatly from any known animal. Some of the most ancient Silurian
animals, as the Nautilus, Lingula, &c.,
do not differ much from living species; and it cannot on
my my 1859 1860 1861 1866 | our 1869 1872 |
theory be supposed, that these old species were the progenitors of all the species
|
which any great group of marine animals might be multiplied; and here they would remain confined, until some of the species became adapted to a cooler climate, and were enabled to double the
southern southern 1859 1860 1861 1866 1869 | Southern 1872 |
capes of Africa or Australia, and thus reach other and distant seas. |
|
From these
considerations, considerations, 1869 1872 |
and similar considerations, but chiefly 1859 1860 1861 1866 |
from our ignorance of the geology of other countries beyond the confines of Europe and the United
States, States, 1869 1872 | States; 1859 1860 1861 1866 |
and from the revolution in our palæontological
knowledge effected by knowledge effected by 1869 1872 |
ideas on many points, which 1859 1860 1861 1866 |
the discoveries of
....... 1869 1872 | even 1859 1860 1861 1866 |
the last dozen
years, years, 1869 1872 | years 1859 1860 1861 1866 |
....... 1869 1872 | have effected, 1859 1860 1861 1866 |
it seems to me to be about as rash
....... 1869 1872 | in us 1859 1860 1861 1866 |
to dogmatize on the succession of organic
forms forms 1869 1872 | beings 1859 1860 1861 1866 |
throughout the world, as it would be for a naturalist to land for five minutes on
a a 1869 1872 | some one 1859 1860 1861 1866 |
barren point in Australia, and then to discuss the number and range of its productions. |
On
On
1866 1869 1872 |
On
1859 1860 1861 |
the
the
1866 1869 1872 |
the
1859 1860 1861 |
sudden
sudden
1866 1869 1872 |
sudden
1859 1860 1861 |
Appearance
Appearance
1866 1869 1872 |
appearance
1859 1860 1861 |
of
of
1866 1869 1872 |
of
1859 1860 1861 |
Groups
Groups
1866 1869 1872 |
groups
1859 1860 1861 |
of
of
1866 1869 1872 |
of
1859 1860 1861 |
allied
allied
1866 1869 1872 |
Allied
1859 1860 |
allied
1861 |
Species
Species
1866 1869 1872 |
Species
1859 1860 1861 |
in
in
1866 1869 1872 |
in
1859 1860 1861 |
the
the
1866 1869 1872 |
the
1859 1860 1861 |
lowest
lowest
1866 1869 1872 |
lowest
1859 1860 1861 |
known
known
1866 1869 1872 |
known
1859 1860 1861 |
Fossiliferous
Fossiliferous
1866 1869 1872 |
fossiliferous
1859 1860 1861 |
Strata
.
Strata
. 1866 1869 1872 |
strata
.—
1859 1860 1861 |
|
There is another and allied difficulty, which is much
more serious. more serious. 1866 1869 1872 | graver. 1859 1860 1861 |
I allude to the manner in which
many species in several many species in several 1869 |
numbers of species 1859 1860 1861 1866 |
species belonging to several 1872 |
of the
main divisions of the animal kingdom main divisions of the animal kingdom 1869 1872 |
same group, 1859 1860 1861 |
same group 1866 |
suddenly appear in the lowest known fossiliferous rocks. Most of the arguments which have convinced me that all the existing species of the same group
are are 1869 1872 | have 1859 1860 1861 1866 |
descended from
a single a single 1869 1872 | one 1859 1860 1861 1866 |
progenitor, apply with
nearly nearly 1859 1860 1861 1866 1869 | nearly 1872 |
equal force to the earliest known species. For instance,
it it 1869 1872 | I 1859 1860 1861 1866 |
cannot
be doubted be doubted 1869 1872 | doubt 1859 1860 1861 1866 |
that all the
Silurian trilobites are Silurian trilobites are 1869 |
Silurian trilobites have 1859 1860 1861 1866 |
Cambrian and Silurian trilobites are 1872 |
descended from some one crustacean, which must have lived long before the
Silurian Silurian 1859 1860 1861 1866 1869 | Cambrian 1872 |
age, and which probably differed greatly from any known animal. Some of the most ancient
Silurian Silurian 1859 1860 1861 1866 1869 | Silurian 1872 |
animals, as the Nautilus, Lingula,
&c., &c., 1859 1860 1866 1869 1872 | &c, 1861 |
do not differ much from living species; and it cannot on
our our 1869 1872 | my 1859 1860 1861 1866 |
theory be supposed, that these old species were the progenitors of all the species
|