Origin of Species Variorum

←Subtitle not present 1859 1860 1861 Character of Domestic Varieties; difficulty of distinguishing between Varieties and Species; origin of Domestic Varieties from one or more Species. 1866

→ same species, also, often 1859 1860 1861

OMIT 1866 1869 1872

→ in the same manner as, only in most cases 1859 1860 1861

only in most cases 1866 1869

in the same manner as do the closely allied species of the same genus 1872

→ lesser degree than, do closely-allied species of the same genus in a 1859 1860 1861

lesser degree, in the same manner as do closely-allied species of the same genus in a 1866

less degree, in the same manner as do closely-allied species of the same genus in a 1869

OMIT 1872

→ nature. 1859 1860 1861 1866 1869

nature, but the differences in most cases are less in degree. 1872

→ when we find that there are hardly any 1859 1860 1861 1866

as true, for the 1869 1872

→ either amongst animals or plants, which have not 1859 1860 1861 1866

of many animals and plants have 1869 1872

→ the descendants of aboriginally distinct species, 1861 1866 1869 1872

mere varieties, 1859 1860

→ mere varieties. 1861 1866 1869 1872

the descendants of aboriginally distinct species. 1859 1860

→ I think it can 1861 1866

I think it could 1859 1860

It can 1869 1872

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

When it is explained how genera originate under nature, it will be seen that we have no right to expect often to find a generic amount of difference in our domesticated races.

of character probably do occur; but natural selection, as will hereafter be explained, will determine how far the new characters thus arising shall be preserved. →

When we look to the hereditary varieties or races of our domestic animals and plants, and compare them with

species

....

closely allied

together,

species,

we generally perceive in each domestic race, as already remarked, less uniformity of character than in true species. Domestic races

often

of the

→same species, also, often have a somewhat monstrous character; by which I mean, that, although differing from each other, and from

the

....

other species of the same genus, in several trifling respects, they often differ in an extreme degree in some one part, both when compared one with another, and more especially when compared with

~~all~~

all

the species

under

nature to which they are nearest allied. With these exceptions (and with that of the perfect fertility of varieties when crossed, — a subject hereafter to be discussed), domestic races of the same species differ from each

other,

other

→in the same manner as, only in most cases in a →lesser degree than, do closely-allied species of the same genus in a state of →nature.

~~I think~~

I think

this

This

that this

must be

admitted

admitted,

→when we find that there are hardly any domestic

races

races,

→either amongst animals or plants, which have not been ranked by

some

....

competent judges as →the descendants of aboriginally distinct species, and by other competent judges as →mere varieties. If any

well marked

marked

distinction existed between

a domestic

domestic

race

races

and

a species,

species,

this source of doubt

would

could

not so perpetually recur. It has often been stated that domestic races do not differ from each other in characters of generic value. →I think it can be shown that this statement is

not

hardly

correct; but naturalists differ

most widely

much

widely

in determining what characters are of generic value; all such

valua- tions

valuations

being at present empirical. ↑ Moreover, on the view of the origin of genera which I shall presently