See page in:
1859
1860
1861
1866
1869
1872

Compare with:
1859
1861
1866
1869
1872

to have been 1859 1860 1861 1866
OMIT 1869 1872

a certain extent 1859 1860 1861 1866
have been partially 1869
have become partially 1872

the comparison not 1859 1860 1861 1866 1869
serial homologies, or the comparison 1872

in different members of a class, but 1859 1860 1861
or organ in different members of the same class, but 1866
or organs in different members of the same class, but 1869
or organs in the same individual, and not 1872

the same individual. 1859 1860 1861 1866 1869
different members of the same class. 1872

each member of the vertebrate and articulate 1859 1860 1861
all the members of the vertebrate 1866
all the higher vertebrate 1869 1872

We see the same law in comparing 1859 1860 1861
So it is with 1866 1869 1872

in embryonic crustaceans and in many other animals, and in flowers, 1859 1860 1861
in flowers during their early development, as well as in crustaceans and many other animals during their embryonic states, 1866
during the early or embryonic stages of development in flowers, 1869 1872

that 1859 1860 1861 1866
as well as in crustaceans and many other animals, that 1869 1872

an early stage of growth 1859 1860 1861 1866
first 1869 1872

these facts 1859 1860 1861 1866 1869
the cases of serial homologies 1872

bone? 1859 1860 1861 1866 1869
bone, apparently representing vertebræ? 1872

birds. 1859 1860 1861
birds and reptiles. 1866 1869 1872

in the formation of 1859 1860 1861 1866
to form 1869 1872

purposes? 1859 1860 1861 1866 1869
purposes, namely flying and walking? 1872

general pattern seems to have been thus to a certain extent obscured.
There is another and equally curious branch of
our present
our
the present
subject; namely, the comparison not of the
different
same
parts
part
in different members of a class, but of the
same
different
parts or organs in the same individual. Most physiologists believe that the bones of the skull are
homologous—
homologous with—
that
is,
is
correspond in number and in relative
connexion—
connexion with—
with the
the
elemental parts of a certain number of vertebræ. The anterior and posterior limbs in each member of the vertebrate and articulate classes are plainly homologous. We see the same law in comparing the wonderfully complex jaws and legs
of
in
crustaceans. It is familiar to almost every one, that in a flower the relative position of the sepals, petals, stamens, and pistils, as well as their intimate structure, are intelligible on the view that they consist of metamorphosed leaves, arranged in a spire. In monstrous plants, we often get direct evidence of the possibility of one organ being transformed into another; and we can actually
see,
see
in embryonic crustaceans and in many other animals, and in flowers, that organs, which when mature become extremely
different
different,
are at an early stage of growth exactly alike.
How inexplicable are these facts on the ordinary view of creation! Why should the brain be enclosed in a box composed of such numerous and such
extraordinarily
extra-ordinarily
extraor- dinarily
extraordinary
shaped pieces of bone? As Owen has remarked, the benefit derived from the yielding of the separate pieces in the act of parturition
by
of
mammals, will by no means explain the same construction in the skulls of birds. Why should similar bones have been created in the formation of the wing and
the leg
leg
of a bat, used as they are for such totally different purposes? Why should one crustacean, which has an extremely complex