Origin of Species Variorum

↑ 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

→ has just been 1861

I have just 1866

→ advanced by me 1860 1861 1866 1869 1872

entertained 1859

→ and by Mr. Wallace in the Linnean Journal, 1860 1861 1866 1869

on the origin of species, 1859

and by Mr. Wallace, 1872

→ on the origin of species are 1860 1861 1866 1869 1872

are 1859

→ in essence a 1859 1860 1861 1866

a true 1869 1872

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 The case is different with the members of each great class, as the Vertebrata, the Articulata, &c.; for here, as →has just been remarked, we have in the laws of homology and embryology,

&c.;

&c.,

distinct evidence that all have descended from a single parent.

When the views →advanced by me in this

volume

volume,

→and by Mr. Wallace in the Linnean Journal, or when analogous views →on the origin of species are generally admitted, we can dimly foresee that there will be a considerable revolution in natural history. Systematists will be able to pursue their labours as at present; but they will not be incessantly haunted by the shadowy doubt whether this or that form be →in essence a species.