Origin of Species Variorum

→ in comparison with the number of species inhabiting an equal area of 1869 1872

compared with those on the 1859 1860 1861 1866

→ will 1859 1860 1861 1866 1869

between them will 1872

→ average for the 1859 1860 1861 1866 1869

OMIT 1872

→ as fresh-water productions ever can range, 1859 1860 1861 1866 1869

OMIT 1872

→ I believe mainly depends 1859 1860 1861 1866 1869

apparently depends in main part 1872

→ OMIT 1869 1872

to another and often distant 1859 1860 1861 1866

→ water to another. 1869 1872

water. 1859 1860 1861 1866

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

Nature, like a careful gardener, thus takes her seeds from a bed of a particular nature, and drops them in another equally well fitted for them.

→ if we accept 1869

on 1859 1860 1861 1866

with respect to distribution, on 1872

→ not only all 1869

all 1859 1860 1861 1866

only all 1872

→ species, wherever found, have migrated from some one area, but that allied 1869

and of allied 1859 1860 1861 1866

OMIT 1872

→ although now inhabiting the most distant points, have proceeded 1869

have descended 1859 1860 1861 1866

have migrated 1872

→ a single area,— the birthplace of their early progenitor. 1869

a single parent; and therefore have all proceeded from a common birthplace, notwithstanding that in the course of time they have come to inhabit distant points of the globe. 1859 1860 1861 1866

some one area, but that allied species, although now inhabiting the most distant points, have proceeded from a single area,— the birthplace of their early progenitors. 1872

→ stated that I cannot honestly admit Forbess view on 1860 1869

stated that I cannot honestly admit Forbes's view on 1859 1861 1866

given my reasons for disbelieving in 1872

small,

small

→in comparison with the number of species inhabiting an equal area of land, the competition →will probably be less severe

~~between aquatic~~

between aquatic

than between terrestrial species; consequently an intruder from the waters of a foreign

country,

country

would

will

have a better chance of seizing on a

place,

new place,

than in the case of terrestrial colonists. We

should,

should

also,

also

remember that

some, perhaps

....

many,

many

fresh-water productions are low in the scale of nature, and

that

....

we have reason to believe that

such

....

~~low~~

low

beings

~~change or~~

change or

become modified

more slowly

less quickly

than the high; and this will give

longer

~~a longer~~

a longer

time

for

than

the →average for the migration of

~~the same~~

the same

aquatic species. We should not forget the probability of many

fresh-water forms

species

having formerly ranged

continuously →as fresh-water productions ever can range, over immense areas, and

then having

having subsequently

become extinct

intermediate

points.

regions.

But the wide distribution of fresh-water plants and of the lower animals, whether retaining the same identical form or in some degree modified, →I believe mainly depends on the wide dispersal of their seeds and eggs by animals, more especially by fresh-water birds, which have

large

great

powers of flight, and naturally travel from one →OMIT piece of →water to another. ↑

the

Inhabitants

Oceanic

Islands .—

Islands

Islands .

We now come to the last of the three classes of facts, which I have selected as presenting the greatest amount of

difficulty

difficulty,

→if we accept the view that →not only all the individuals

both

....

of the same →species, wherever found, have migrated from some one area, but that allied

species

species,

→although now inhabiting the most distant points, have proceeded from →a single area,— the birthplace of their early progenitor. I have already →stated that I cannot honestly admit Forbess view on continental

extensions

extensions,