Origin of Species Variorum

→ with 1859 1860 1861 1866

or rivalry with 1872

→ males. 1859 1860 1861 1866

males; and these characters will be transmitted to one sex or to both sexes, according to the form of inheritance which prevails. 1872

↑ 3 blocks not present in 1859 1860 1861 1866 1872; present in 1869

Natural selection, on the principle of qualities being inherited at corresponding ages, can modify the egg, seed, or young, as easily as the adult. Amongst many animals, sexual selection will give its aid to ordinary selection, by assuring to the most vigorous and best adapted males the greatest number of offspring. Sexual selection will also give characters useful only to the males, in their struggles with other males; and these characters will be transmitted to one sex or to both sexes, according to the form of inheritance which prevails.

→ nature, in modifying and 1859 1860 1861 1866

OMIT 1869 1872

→ OMIT 1861 1866 1869 1872

more living beings can be supported on the same area 1859 1860

→ by so much a greater number can be supported on the same area,— of 1861 1866

of 1859 1860

by so much can a greater number be supported on the same area,— of 1869

by so much the more can a large number be supported on the same area,— of 1872

→ or to naturalised productions. 1860 1861 1866 1869

or at naturalised productions. 1859

and to the productions naturalised in foreign lands. 1872

→ within each class, which 1861 1866 1869 1872

which 1859 1860

animals, sexual selection will

have given

give

its aid to ordinary selection, by assuring to the most vigorous and best adapted males the greatest number of offspring. Sexual selection will also give characters useful to the males alone, in their struggles →with other →males. ↑

Whether natural selection has really thus acted in →nature, in modifying and adapting the various forms of life to their several conditions and stations, must be judged

by the general

tenour

tenor

and balance of

the evidence

evidence

given in the following chapters. But we

have already

already

seen

see

how it entails extinction; and how largely extinction has acted in the

worlds

world's

history, geology plainly declares. Natural selection, also, leads to divergence of character; for →OMIT the more

they

organic beings

diverge in structure, habits, and constitution, →by so much a greater number can be supported on the same area,— of which we see proof by looking

the inhabitants of any small

spot,

spot

→or to naturalised productions.

Therefore

Therefore,

during the modification of the descendants of any one species, and during the incessant struggle of all species to increase in numbers, the more diversified

the

these

descendants become, the better will be their chance of

success

succeeding

in the battle

for

life. Thus the small differences distinguishing varieties of the same species,

will

....

steadily tend to

increase,

increase

till they

~~come to~~

come to

equal the greater differences between species of the same genus, or even of distinct genera.

We have seen that it is the common, the

widely diffused,

widely-diffused,

and

widely ranging

widely-ranging

species, belonging to the larger

genera,

genera

→within each class, which vary most; and these

will

....

tend to transmit to their modified offspring that superiority which now makes them dominant in their own countries. Natural selection, as has just been remarked, leads to divergence of character and to much extinction of the less improved and intermediate forms