Origin of Species Variorum

→ in the different 1859 1860 1861

in the several 1866 1869

and this we do find in the several 1872

→ even within the same class, 1859 1860 1861 1866 1869

OMIT 1872

→ should 1859 1860 1861 1866 1869

even within the same class, should 1872

→ common to other 1859 1860 1861 1866

the same with those in other 1869

the same with those in an adjoining 1872

→ there 1859 1860 1861 1866 1869

in islands, there 1872

→ of 1859 1860 1861 1866 1872

in islands, of 1869

→ and 1859 1860 1861 1869 1872

in islands, and 1866

→ were probably 1859 1860 1861

had probably 1866

might have been 1869 1872

→ in 1859 1860 1861 1866 1869

if there exist very closely allied or representative species in 1872

→ there should be a correlation, in the presence of 1859 1860 1861 1866

where very closely allied or representative species exist, there should almost always exist some 1869

some 1872

→ of varieties, of doubtful species, and of distinct but representative species. 1859 1860 1861 1866

will almost always there be found. 1872

OMIT 1869

in great force, some existing in scanty numbers— →in the different great geographical provinces of the world.

On these same

principles

principles,

we can understand, as I have endeavoured to show, why oceanic islands should have few inhabitants, but

that of

these,

these

large proportion

great number

should be endemic or peculiar; and why, in relation to the means of migration, one group of

beings

beings,

→even within the same class, should have all its species

peculiar,

endemic,

and another

group,

group

→should have all its species →common to other

quarter

quarters

of the world. We can see why whole groups of organisms, as batrachians and terrestrial mammals, should be absent from oceanic islands, whilst the most isolated islands

should possess

possess

their own peculiar species of

aërial

aerial

aërial

mammals or bats. We can see

why,

why

→there should be some relation between the

presence,

presence

→of mammals, in a more or less modified

condition

condition,

→and the depth of the sea between

such

islands

island

and the mainland. We can clearly see why all the inhabitants of an archipelago, though specifically distinct on the several islets, should be closely related to each

other;

other,

and

should likewise

likewise

be related, but less closely, to those of the nearest

continent,

continent

or other source whence immigrants →were probably

been derived.

derived.

We can see

why,

why

→in two areas, however distant from each other, →there should be a correlation, in the presence of identical

species.

species

species,

→of varieties, of doubtful species, and of distinct but representative species.

As the late Edward Forbes often insisted, there is a striking parallelism in the laws of life throughout time and

space;

space:

the laws governing the succession of forms in past times being nearly the same with those governing at the present time the differences in different areas. We see this in many facts. The endurance of each species and group of species is continuous in time; for the

apparent exceptions

exceptions

to the rule are so few, that they may