Origin of Species Variorum

→ But the existence of several quite distinct species, belonging to genera exclusively confined to the south, 1859 1860 1861 1866

The existence, 1869

The existence 1872

→ is, on the theory of descent with modification, a far 1866

is, on my theory of descent with modification, a far 1859 1860 1861

of species, which, though distinct, belong to genera exclusively confined to the south, is a 1869 1872

→ peculiar and very 1859 1860 1861 1866

OMIT 1869 1872

→ have 1859 1860 1861 1866

belonging to the same genera have 1869 1872

→ I 1859 1860 1861 1866

It may be 1869 1872

→ were 1859 1860 1861 1866

had been already 1869 1872

→ By these means, as I believe, 1859 1860 1861 1866

Thus 1869 1872

→ and New Zealand, 1866

New Zealand have 1859

New Zealand, have 1860 1861

and New Zealand, might have 1869

and New Zealand, may have 1872

→ on 1859 1860 1861 1866

throughout the world on 1869 1872

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

And we have now seen that Mr. Crolls conclusion that successive Glacial periods in the one hemisphere coincided with warmer periods in the opposite hemisphere, together with the admission of the slow modification of species, explains a multitude of facts in the distribution of the same and of the allied forms of life in all parts of the globe.

→ may be said to 1859 1860 1861 1866

OMIT 1869 1872

that towards the close of the Glacial period, icebergs, as suggested by Lyell, have been largely concerned in their dispersal. →But the existence of several quite distinct species, belonging to genera exclusively confined to the south, at these and other distant points of the southern hemisphere, →is, on the theory of descent with modification, a far more remarkable

case.

~~difficulty.~~

~~For~~

Some

of these species are so distinct, that we cannot suppose that there has been time since the commencement of the

last Glacial

Glacial

period for their

migration

migration,

and

~~for their~~

for their

subsequent modification to the necessary degree. The facts seem to

~~me to~~

me to

indicate that →peculiar and very distinct species →have migrated in radiating lines from

some

common centre; and I am inclined to look in the southern, as in the northern hemisphere, to a former and warmer period, before the commencement of the

last Glacial

Glacial

period, when the

Antarctic

antarctic

lands, now covered with ice, supported a highly peculiar and isolated flora. →I

suspected

suspect

that before this flora was exterminated

during

the

last Glacial

Glacial

epoch, a few forms →were widely dispersed to various points of the southern hemisphere by occasional means of transport, and by the

aid

aid,

as halting-places, of

existing and

....

now sunken

islands,

and

perhaps

the

commencement

the

Glacial

period,

icebergs.

→By these means, as I believe, the southern shores of America, Australia, →and New Zealand,

become

became

slightly tinted by the same peculiar forms of

~~vegetable~~

vegetable

life.

Sir C. Lyell in a striking passage has speculated, in language almost identical with mine, on the effects of great alternations of climate →on geographical distribution. ↑ I believe that the world has recently felt one of his great cycles of change; and that on this view, combined with modification through natural selection, a multitude of facts in the present distribution both of the same and of allied forms of life can be explained. The living waters →may be said to have flowed