Origin of Species Variorum

→ OMIT 1861 1866 1869 1872

germinal vesicles, their 1859 1860

→ their liability to injurious influences. 1861 1866 1869 1872

reproduction. 1859 1860

↑ 1 blocks not present in 1859 1860 1861 1866 1869; present in 1872

With all organic beings, excepting perhaps some of the very lowest, sexual reproduction seems to be essentially similar.

→ as far as is at present known, the germinal vesicle is the same. 1861 1866

organic beings sexual reproduction seems to be essentially similar. 1869

as far as is at present known, the germinal vesicle is the same; 1872

→ So that every individual organic being 1861 1866

With all, as far as is at present known, the germinal vesicle is the same; so that all organisms 1869

so that all organisms 1872

→ on the principle of natural selection with divergence of character, it does not seem incredible that, 1861 1866 1869 1872

I should infer from analogy that probably all the organic beings which have ever lived on this earth have descended 1859 1860

→ such low and intermediate form, both animals and plants may have been developed; and, if we admit this, we must admit that all the organic beings which have ever lived on this earth may have descended from some one 1861 1866

one 1859 1860

such low and intermediate form, both animals and plants may have been developed; and, if we admit this, we must likewise admit that all the organic beings which have ever lived on this earth may be descended from some one 1869 1872

→ OMIT 1861 1866 1869 1872

breathed. 1859

breathed by the Creator. 1860

→ I have just 1866

has just been 1861

from some one prototype. But analogy may be a deceitful guide. Nevertheless all living things have much in

common,

common,—

in their chemical composition, their →OMIT cellular structure,

and

....

their laws of

growth

growth,

and →their liability to injurious influences. We see this even in so trifling a

fact

circumstance

as that the same poison often similarly affects plants and animals; or that the poison secreted by the

gallfly

gall-fly

produces monstrous growths on the wild rose or oak-tree. In all organic beings the union of a male and female elemental cell seems occasionally to be necessary for the production of a new being. ↑

With

all

all,

→as far as is at present known, the germinal vesicle is the same. →So that every individual organic being

start

starts

from a common origin. If we look even to the two main divisions— namely, to the

animal,

animal

and vegetable kingdoms— certain low forms are so far intermediate in character that naturalists have disputed to which kingdom they should be

referred.

referred,

and, as

Professor Asa Gray has remarked, "the spores and other reproductive bodies of many of the lower

algæ?

algæ

may claim to have first a characteristically animal, and then an unequivocally vegetable existence."

Therefore

Therefore,

→on the principle of natural selection with divergence of character, it does not seem incredible that, from some →such low and intermediate form, both animals and plants may have been developed; and, if we admit this, we must admit that all the organic beings which have ever lived on this earth may have descended from some one primordial

form,

into

which

life

was

first

→OMIT But this inference is chiefly grounded on analogy, and it is immaterial whether or not it be accepted. The case is different with the members of each great class, as the Vertebrata, the Articulata, &c.; for here, as →I have just remarked, we have in the laws of homology and embryology,

&c.,

&c.;

distinct evidence that all have descended from a single parent.