Comparison with 1872 |
|
become modified, and all analogy would lead us to believe that some at least of the squirrels would decrease in numbers or become exterminated, unless they also became modified and improved in structure in a corresponding manner. Therefore, I can see no difficulty, more especially under changing conditions of life, in the continued preservation of individuals with fuller and fuller flank-membranes, each modification being useful, each being propagated,
until, until, 1866 1869 1872 | until 1859 1860 1861 |
by the accumulated effects of this process of natural selection, a perfect so-called flying squirrel was produced. |
|
Now look at the Galeopithecus or
so-called flying so-called flying 1872 | flying 1859 1860 1861 1866 1869 |
lemur, which formerly was
....... 1869 1872 | falsely 1859 1860 1861 1866 |
ranked amongst
bats, but is now believed to belong to the Insectivora. bats, but is now believed to belong to the Insectivora. 1872 |
bats. 1859 1860 1861 1866 1869 |
An An 1872 |
It has an 1859 1860 1861 1866 1869 |
extremely wide
flank-membrane flank-membrane 1872 | flank-membrane, 1859 1860 1861 1866 1869 |
stretches stretches 1872 | stretching 1859 1860 1861 1866 1869 |
from the corners of the jaw to the tail, and
includes includes 1872 | including 1859 1860 1861 1866 1869 |
the limbs
with with 1872 | and 1859 1860 1861 1866 1869 |
the elongated
fingers. fingers. 1872 | fingers: 1859 1860 1861 1866 1869 |
....... 1872 | the 1859 1860 1861 1866 1869 |
....... 1872 | flank membrane 1859 | flank-membrane 1860 1861 1866 1869 |
....... 1872 | is, 1859 1860 1861 1866 1869 |
....... 1872 | also, 1859 1860 1861 1866 1869 |
....... 1872 | furnished 1859 1860 1861 1866 1869 |
....... 1872 | with 1859 1860 1861 1866 1869 |
....... 1872 | an 1859 1860 1861 1866 1869 |
....... 1872 | extensor 1859 1860 1861 1866 1869 |
....... 1872 | muscle. 1859 1860 1861 1866 1869 |
This flank-membrane is furnished with an extensor muscle. Although no graduated links of structure,
fitted for gliding through the air, now connect the Galeopithecus with the other
Insectivora, Insectivora, 1872 | Lemuridæ, 1859 1860 1861 1866 1869 |
yet
there is there is 1869 1872 |
I can see 1859 |
I see 1860 1861 1866 |
no difficulty in supposing that such links formerly existed, and that each
was developed in was developed in 1872 |
had been formed by 1859 1860 1861 1866 1869 |
the same
manner manner 1872 | steps 1859 1860 1861 1866 1869 |
as
with with 1872 | in 1859 1860 1861 1866 1869 |
the
...OMIT 1872 |
case of the 1859 1860 1861 1866 1869 |
less perfectly gliding squirrels;
....... 1872 | and that 1859 1860 1861 1866 1869 |
each grade of structure
having been having been 1872 | had been 1859 | was 1860 1861 1866 1869 |
useful to its possessor. Nor can I see any insuperable difficulty in further believing
....... 1872 | it possible 1859 1860 1861 1866 1869 |
that the
membrane connected membrane connected 1872 | membrane-connected 1859 1860 1861 1866 1869 |
fingers and fore-arm
of the Galeopithecus might
have been have been 1872 | be 1859 1860 1861 1866 1869 |
greatly lengthened by natural
selection. selection. 1872 | selection; 1859 1860 1861 1866 1869 |
and this, as far as the organs of flight are concerned, would
have converted the animal have converted the animal 1872 |
convert it 1859 1860 1861 1866 1869 |
into a bat. In
certain bats in which certain bats in which 1872 |
bats which have 1859 1860 1861 1866 |
certain bats which have 1869 |
the wing-membrane
extends extends 1872 | extended 1859 1860 1861 1866 1869 |
from the top of the shoulder to the
tail tail 1872 | tail, 1859 1860 1861 1866 1869 |
and includes and includes 1872 | including 1859 1860 1861 1866 1869 |
the hind-legs, we perhaps see
traces of an apparatus originally
fitted fitted 1869 1872 | constructed 1859 1860 1861 1866 |
for gliding through the air rather than for flight. |
|
If about a dozen genera of birds
were to were to 1872 | had 1859 1860 1861 1866 1869 |
become
extinct, extinct, 1872 | extinct 1859 1860 1861 1866 1869 |
...OMIT 1872 |
or were unknown, 1859 1860 1861 1866 1869 |
who would have ventured to
....... 1861 1866 1869 1872 | have 1859 1860 |
|
become modified, and all analogy would lead us to believe that some at least of the squirrels would decrease in numbers or become exterminated, unless they also became modified and improved in structure in a corresponding manner. Therefore, I can see no difficulty, more especially under changing conditions of life, in the continued preservation of individuals with fuller and fuller flank-membranes, each modification being useful, each being propagated,
until until 1859 1860 1861 | until, 1866 1869 1872 |
by the accumulated effects of this process of natural selection, a perfect so-called flying squirrel was produced. |
|
Now look at the Galeopithecus or
flying flying 1859 1860 1861 1866 1869 | so-called flying 1872 |
lemur, which formerly was
falsely falsely 1859 1860 1861 1866 | falsely 1869 1872 |
ranked amongst
bats. bats. 1859 1860 1861 1866 1869 |
bats, but is now believed to belong to the Insectivora. 1872 |
It has an It has an 1859 1860 1861 1866 1869 |
An 1872 |
extremely wide
flank-membrane, flank-membrane, 1859 1860 1861 1866 1869 | flank-membrane 1872 |
stretching stretching 1859 1860 1861 1866 1869 | stretches 1872 |
from the corners of the jaw to the tail, and
including including 1859 1860 1861 1866 1869 | includes 1872 |
the limbs
and and 1859 1860 1861 1866 1869 | with 1872 |
the elongated
fingers: fingers: 1859 1860 1861 1866 1869 | fingers. 1872 |
the the 1859 1860 1861 1866 1869 | the 1872 |
flank membrane flank membrane 1859 | flank membrane 1872 | flank-membrane 1860 1861 1866 1869 |
is, is, 1859 1860 1861 1866 1869 | is, 1872 |
also, also, 1859 1860 1861 1866 1869 | also, 1872 |
furnished furnished 1859 1860 1861 1866 1869 | furnished 1872 |
with with 1859 1860 1861 1866 1869 | with 1872 |
an an 1859 1860 1861 1866 1869 | an 1872 |
extensor extensor 1859 1860 1861 1866 1869 | extensor 1872 |
muscle. muscle. 1859 1860 1861 1866 1869 | muscle. 1872 |
↑1 blocks not present in 1859 1860 1861 1866 1869; present in 1872 | This flank-membrane is furnished with an extensor muscle.
|
Although no graduated links of
structure, structure, 1859 1860 1861 1866 1872 | struc- ture, 1869 |
fitted for gliding through the air, now connect the Galeopithecus with the other
Lemuridæ, Lemuridæ, 1859 1860 1861 1866 1869 | Insectivora, 1872 |
yet
I can see I can see 1859 |
I see 1860 1861 1866 |
there is 1869 1872 |
no difficulty in supposing that such links formerly existed, and that each
had been formed by had been formed by 1859 1860 1861 1866 1869 |
was developed in 1872 |
the same
steps steps 1859 1860 1861 1866 1869 | manner 1872 |
as
in in 1859 1860 1861 1866 1869 | with 1872 |
the
case of the case of the 1859 1860 1861 1866 1869 |
OMIT 1872 |
less perfectly gliding squirrels;
and that and that 1859 1860 1861 1866 1869 | and that 1872 |
each grade of structure
had been had been 1859 | was 1860 1861 1866 1869 | having been 1872 |
useful to its possessor. Nor can I see any insuperable difficulty in further believing
it possible it possible 1859 1860 1861 1866 1869 | it possible 1872 |
that the
membrane-connected membrane-connected 1859 1860 1861 1866 1869 | membrane connected 1872 |
fingers and
fore-arm fore-arm 1859 1872 | forearm 1860 1861 1866 1869 |
of the Galeopithecus might
be be 1859 1860 1861 1866 1869 | have been 1872 |
greatly lengthened by natural
selection; selection; 1859 1860 1861 1866 1869 | selection. 1872 |
and this, as far as the organs of flight are concerned, would
convert it convert it 1859 1860 1861 1866 1869 |
have converted the animal 1872 |
into a bat. In
bats which have bats which have 1859 1860 1861 1866 |
certain bats which have 1869 |
certain bats in which 1872 |
the wing-membrane
extended extended 1859 1860 1861 1866 1869 | extends 1872 |
from the top of the shoulder to the
tail, tail, 1859 1860 1861 1866 1869 | tail 1872 |
including including 1859 1860 1861 1866 1869 | and includes 1872 |
the hind-legs, we perhaps
see see 1859 1860 1861 1866 1872 |
yet see actual 1869 |
traces of an apparatus originally
constructed constructed 1859 1860 1861 1866 | fitted 1869 1872 |
for gliding through the air rather than for flight. |
|
If about a dozen genera of birds
had had 1859 1860 1861 1866 1869 | were to 1872 |
become
extinct extinct 1859 1860 1861 1866 1869 | extinct, 1872 |
or were unknown, or were unknown, 1859 1860 1861 1866 1869 |
OMIT 1872 |
who would have ventured to
have have 1859 1860 | have 1861 1866 1869 1872 |
|