Origin of Species Variorum

→ this we find has been the case; 1859 1860 1861 1866 1869

they have been modified; 1872

→ though very 1859 1860 1861

one with another, though 1866 1869 1872

→ and many are 1861

and some few are 1859 1860

or sub-species, and some as certainly 1866 1869

or sub-species, and some as 1872

→ species. 1859 1860 1861

each other on the several ranges. 1866 1869 1872

→ illustrating what, as I believe, actually took place during the Glacial period, I 1859 1860 1861 1866

the foregoing illustration I have 1869 1872

→ the 1859 1860 1861 1866

of our imaginary Glacial period, the 1869 1872

→ the foregoing remarks on distribution apply not only to strictly arctic forms, but also to 1859 1860 1861 1866

it is necessary also to 1869

it is also necessary to assume that 1872

→ for some of these are 1859 1860 1861 1866 1869

were 1872

→ lower mountains and 1859 1860 1861

lower mountain-slopes and 1866 1869

world, for some of the species which now exist 1872

→ plains 1859 1860 1861 1866 1869

lower mountain-slopes and on the plains 1872

→ and 1859 1860 1861 1866 1869

are the same; and 1872

to much modification. But with

the

our

Alpine productions, left isolated from the moment of the returning warmth, first at the bases and ultimately on the summits of the mountains, the case will have been somewhat

dif-

....

ferent;

different;

for it is not likely that all the same arctic species will have been left on

mountain ranges

mountain-ranges

far distant

distant

from each other, and have survived there ever since; they

will

will,

also

also,

in all

probability,

probability

have become mingled with ancient Alpine species, which must have existed on the mountains before the commencement of the Glacial epoch, and which during

the

its

coldest period will have been temporarily driven down to the plains; they will, also, have been

subsequently exposed

exposed

to somewhat different climatal influences. Their mutual relations will thus have been in some degree disturbed; consequently they will have been liable to modification; and →this we find has been the case; for if we compare the present Alpine plants and animals of the several great European

mountain-ranges

mountain-ranges,

→though very many of the species

still remain

remain

are

identically the same, some

exist as

present

varieties, some

~~are ranked~~

are ranked

as doubtful

forms

forms,

→and many are distinct yet closely allied

species

representing

representative

→species.

In →illustrating what, as I believe, actually took place during the Glacial period, I

have assumed

assumed

that at

the

its

commencement →the arctic productions were as uniform round the polar regions as they are at the present day. But →the foregoing remarks on distribution apply not only to strictly arctic forms, but also to

include many

many

sub-arctic and