Origin of Species Variorum

→ 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

which we know to be within the limits of possibility. In the paddles of the

gigantic extinct

extinct gigantic

sea-lizards, and in the mouths of certain suctorial crustaceans, the 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,

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

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

extraordinary

extra-ordinarily

extraor- dinarily

extraordinarily

shaped pieces of →bone? As Owen has remarked, the benefit derived from the yielding of the separate pieces in the act of parturition

mammals, will by no means explain the same construction in the skulls of →birds. Why should similar bones have been created