Origin of Species Variorum

→ must on the theory all be 1869

on my theory have all 1859 1860 1861 1866

must on our theory all be 1872

→ OMIT 1869 1872

some part of 1859 1860 1861 1866

→ some one area. 1869 1872

the area inhabited by their progenitor. 1859 1860 1861 1866

→ When 1869

If it can be shown to be almost invariably the case, that a region, of which 1859 1860 1861 1866

If, when 1872

→ OMIT 1869 1872

its inhabitants are closely related to, or belong to the same genera with 1859 1860 1861

its inhabitants are closely related to, or belong to the same genera with, 1866

→ inhabiting one region are different from those of 1869 1872

of a second region, has probably received at some former period immigrants from this 1859 1860 1861 1866

→ but are closely allied or belong to the same genera, if in all such cases it can be shown that there probably has been at some former period migration from the one region to the other, our general view will be much strengthened; for the explanation is obvious on the principle of descent with modification. 1869

my theory will be strengthened; for we can clearly understand, on the principle of modification, why the inhabitants of a region should be related to those of another region, whence it has been stocked. 1859 1860 1861 1866

though closely allied to them, it can be shown that migration from the one region to the other has probably occurred at some former period, our general view will be much strengthened; for the explanation is obvious on the principle of descent with modification. 1872

→ the species of 1869 1872

species in 1859 1860 1861 1866

→ OMIT 1869 1872

(by substituting the word variety for species) 1859 1860 1861 1866

→ OMIT 1869 1872

in an ingenious paper 1859 1860 1861 1866

→ who 1869 1872

in which he 1859 1860 1861 1866

→ species." And I now know that he attributes this coincidence to descent with modification. 1869

species." 1859 1860 1866

species." 1861

species." And it is now well known that he attributes this coincidence to descent with modification. 1872

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

And I now know from correspondence, that this coincidence he attributes to generation with modification.

→ discussion on "single and 1869

previous remarks on "single and 1859 1860 1866

previous remarks on "single and 1861

question of single or 1872

→ creation" does not directly bear on another 1869

creation" do not directly bear on another 1859 1860 1866

creation" do not directly bear on another 1861

creation differs from another though 1872

→ must be 1869 1872

on my theory, must have 1859 1860 1861 1866

→ which have supplanted each other, but which have never 1869

which will never have 1859 1860 1861

which can never have 1866

that have supplanted each other, but have never 1872

which →must on the theory all be descended from a common progenitor, can have

migrated

migrated,

(undergoing

undergoing

modification during →OMIT their

migration)

migration,

from →some one area. →When most of →OMIT the species →inhabiting one region are different from those of

other

another

region, →but are closely allied or belong to the same genera, if in all such cases it can be shown that there probably has been at some former period migration from the one region to the other, our general view will be much strengthened; for the explanation is obvious on the principle of descent with modification. A volcanic island, for instance, upheaved and formed at the distance of a few hundreds of miles from a continent, would probably receive from it in the course of time a few colonists, and their descendants, though modified, would still be

plainly

....

related by inheritance to the inhabitants of

the

that

continent. Cases of this nature are common, and are, as we shall hereafter

more fully

....

see, inexplicable on the theory of independent creation. This view of the relation of →the species of one region to those

another, does not differ much →OMIT from that

lately

....

advanced →OMIT by Mr. Wallace, →who

concludes,

concludes

that

"every

species has come into existence coincident both in space and time with a pre-existing closely allied →species." And I now know that he attributes this coincidence to descent with modification. ↑

The →discussion on "single and multiple centres of →creation" does not directly bear on another allied question,—

namely

namely,

whether all the individuals of the same species

have

are

descended from a single pair, or single hermaphrodite, or whether, as some authors suppose, from many individuals simultaneously created. With

those

....

organic beings which never

intercross

intercross,