Origin of Species Variorum

→ same new variety. 1859 1860 1861 1866

new variety living together in the same place. 1869

new variety would chiefly cross together. 1872

→ same variety, as the 1859 1860 1861 1866

OMIT 1869 1872

→ with other varieties 1859 1860 1861 1866

OMIT 1869 1872

→ in the case of slow-breeding 1859 1860 1861 1866

in the case of 1869

with 1872

→ unite 1859 1860 1861 1866 1872

breed slowly and unite 1869

→ we 1859 1860 1861 1866 1869

and which do not propagate rapidly, we 1872

→ overrate 1859 1860 1861 1866

assume that 1869

assume that free intercrossing would always eliminate 1872

→ intercrosses in retarding 1859 1860 1861 1866

OMIT 1869 1872

→ for 1859 1860 1861 1866 1872

will always be immediately overpowered by free intercrossing; for 1869

→ a considerable catalogue 1859 1860 1861 1866

a considerable body 1869

forward a considerable body 1872

→ varieties of the same kind 1859 1860 1861 1866 1869

the individuals of each variety 1872

→ I have already attempted to show that 1859 1860 1861 1866

as already stated 1869

as already stated, 1872

→ OMIT 1861 1866

I am convinced that 1859 1860

of time, 1869 1872

→ If there exist 1859 1860 1861 1866 1869

With respect to 1872

→ which never 1859 1860 1861 1866 1869

extremely low in the scale, which do not propagate sexually, nor conjugate, and which cannot possibly 1872

→ as long as their 1859 1860 1861 1866 1869

under the same 1872

→ remain the same, 1859 1860 1861 1866 1869

OMIT 1872

→ destroying any which depart 1859 1860 1861 1866 1869

which will destroy any individuals departing 1872

→ but if their 1859 1860 1861 1866 1869

If the 1872

individuals of the →same new variety. A local variety when once thus formed might subsequently slowly spread to other districts. On

this

the above

principle, nurserymen always prefer

saving

getting

seed from a large body of

plants,

plants

the →same variety, as the chance of intercrossing →with other varieties is thus lessened.

Even →in the case of slow-breeding

animals

animals,

which →unite for each birth, →we must not →overrate the effects of →intercrosses in retarding natural

selection

selection;

→for I can bring →a considerable catalogue of

facts

facts,

showing that within the same area,

two varieties

varieties

of the same animal

may

can

long remain distinct, from haunting different stations, from breeding at slightly different seasons, or from →varieties of the same kind preferring to pair together.

Intercrossing plays a very important part in nature

keeping the individuals of the same species, or of the same variety, true and uniform in character. It will obviously thus act far more efficiently with those animals which unite for each birth;

but,

but

→I have already attempted to show that we have reason to believe that occasional intercrosses take place with all animals and

~~with all~~

with all

plants. Even if these take place only at long

intervals

intervals,

→OMIT the young thus produced will gain so much in vigour and fertility over the offspring from long-continued self-fertilisation, that they will have a better chance of surviving and propagating their kind; and thus, in the long run, the influence of

crosses,

intercrosses,

even at rare intervals, will be great. →If there exist organic beings →which never intercross, uniformity of character can be retained

amongst

them

them,

→as long as their conditions of

life,

life

→remain the same, only through the principle of

inheritance

inheritance,