Origin of Species Variorum

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

they have been modified; 1872

→ one with another, though 1866 1869 1872

though very 1859 1860 1861

→ or sub-species, and some as certainly 1866 1869

and some few are 1859 1860

and many are 1861

or sub-species, and some as 1872

→ each other on the several ranges. 1866 1869 1872

species. 1859 1860 1861

→ the foregoing illustration I have 1869 1872

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

→ of our imaginary Glacial period, the 1869 1872

the 1859 1860 1861 1866

→ it is necessary also to 1869

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

it is also necessary to assume that 1872

→ for some of these are 1859 1860 1861 1866 1869

were 1872

→ lower mountain-slopes and 1866 1869

lower mountains and 1859 1860 1861

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

somewhat

dif-

....

ferent;

different;

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

mountain ranges

mountain-ranges

distant

far 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

→one with another, though many of the species

are

still remain

remain

identically the same, some

present

exist as

varieties, some

are ranked

....

as doubtful

forms,

forms

→or sub-species, and some as certainly distinct yet closely allied

species

representative

representing

→each other on the several ranges.

In →the foregoing illustration I have

have assumed

assumed

that at

its

the

commencement →of our imaginary Glacial period, the arctic productions were as uniform round the polar regions as they are at the present day. But →it is necessary also to

many

include many

sub-arctic and

....

some few

northern

....

temperate

forms

forms,

→for some of these are the same

round