Origin of Species Variorum

→ From 1861 1866

But as from 1859 1860

Owing to 1869 1872

→ the full number of its existing inhabitants, and as most areas are already stocked with a great diversity of forms, 1861 1866 1869

inhabitants, 1859 1860

inhabitants; 1872

→ it follows 1859 1860 1861 1866 1869

and it follows from this, 1872

→ each selected and 1859 1860 1861 1866 1869

the 1872

→ represented 1859 1860 1861 1866 1869

which is represented 1872

→ during 1859 1860 1861 1866 1869

run a good chance of utter extinction, during great 1872

→ seasons or 1859 1860 1861 1866 1869

nature of the seasons, or from a temporary increase 1872

→ continually and slowly being 1859 1860 1861 1866 1869

OMIT 1872

→ the number of 1859 1860 1861 1866 1869

OMIT 1872

→ goes on perpetually and almost 1859 1860 1861 1866 1869

can go on 1872

→ many inevitably 1866 1869

numbers inevitably 1859 1860 1861

in number, many old forms 1872

→ tells us plainly; and we shall presently attempt to show why it is that 1861 1866 1869

shows us plainly; and indeed we can see reason why they should not have thus increased, for 1859 1860

plainly tells us; and we shall presently attempt to show why it is that 1872

→ species throughout the world has not become immeasurably great. 1861 1866 1869 1872

places in the polity of nature is not indefinitely great,— not that we have any means of knowing that any one region has as yet got its maximum of species. 1859 1860

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

Probably no region is as yet fully stocked, for at the Cape of Good Hope, where more species of plants are crowded together than in any other quarter of the world, some foreign plants have become naturalised, without causing, as far as we know, the extinction of any natives.

→ We have seen that 1861 1866

Furthermore, 1859 1860

→ species which offer 1861 1866 1869

species which afford 1859 1860

and diffused or dominant species which offer 1872

→ descendants 1859 1860 1861 1866 1869

and improved descendants 1872

Natural selection acts solely through the preservation of variations in some way advantageous, which consequently endure. →From the high geometrical

powers

rate

ratio

of increase of all organic beings, each area is already

fully

....

stocked with →the full number of its existing inhabitants, and as most areas are already stocked with a great diversity of forms, →it follows

that

that,

as →each selected and favoured

forms

form

increase

increases

in number,

so, generally,

will

generally will

the less favoured

~~forms~~

forms

decrease and become rare. Rarity, as geology tells us, is the precursor to extinction. We

can

can,

~~also,~~

also,

see that any form →represented by few individuals

will

will,

→during fluctuations in the →seasons or in the number of its

enemies.

~~run~~

~~good~~

~~chance~~

~~utter~~

~~extinction.~~

But we may go further than this;

for,

for

as new forms are →continually and slowly being produced, unless we

admit

believe

that →the number of specific forms →goes on perpetually and almost indefinitely

increasing

increasing,

→many inevitably must become extinct. That the number of specific forms has not indefinitely increased, geology →tells us plainly; and we shall presently attempt to show why it is that the number of →species throughout the world has not become immeasurably great. ↑

→We have seen that the species which are most numerous in individuals

will

....

have the best chance of producing within any given period favourable variations. We have evidence of this, in the facts

given

stated

in the second chapter, showing that it is the common →species which offer the greatest number of recorded

varieties.

varieties,

~~incipient~~

incipient

~~species.~~

species.

Hence, rare species will be less quickly modified or improved within any given

period;

period,

~~and~~

and

they will consequently be beaten in the race for life by the modified →descendants of the commoner species.

From these several considerations I think it inevitably follows, that as new species in the course of time are formed through natural selection, others will