Origin of Species Variorum

→ OMIT 1872

on the whole organisation 1861 1866 1869

→ on the whole organisation is 1872

is 1861 1866 1869

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

A good observer, also, states that in cattle susceptibility to the attacks of flies is correlated with colour, as is the liability to be poisoned by certain plants; so that colour would be thus subjected to the action of natural selection.

→ made these remarks 1869 1872

here alluded to them 1859 1860 1861 1866

→ from one or a few parent-stocks, we 1869 1872

we 1859 1860 1861 1866

→ Doctrine , 1872

Doctrine 1866 1869

→ Beauty , 1872

Beauty 1866 1869

→ the sake of beauty, to delight 1872

beauty in the eyes of 1859 1860 1861 1866 1869

→ or the Creator (but this latter point is beyond the scope of scientific discussion), or for the sake of 1872

or for 1859 1860 1861

or, as already mentioned and discussed, for the sake of 1866

or, as already discussed, for the sake of 1869

→ variety, a view already discussed. 1872

variety. 1859 1860 1861 1866 1869

and we are

immedi- ately

immediately

made conscious of this by reflecting on the differences

between

the breeds of our domesticated animals in different

countries,—more

countries,—

~~more~~

especially in the less

civilized

civilised

countries where there has been but little

artificial

methodical

selection. With cattle susceptibility to the attacks of flies is correlated with colour, as is the liability to be poisoned by certain plants; so that even colour would be thus subjected to the action of natural selection.

Careful

Other

Some

observers

observes

are convinced that a damp climate affects the growth of the hair, and that with the hair the horns are correlated. Mountain breeds always differ from lowland breeds; and a mountainous country would probably affect the hind limbs from exercising them more, and possibly even the form of the pelvis; and then by the law of homologous variation, the front limbs and

even

....

the head would probably be affected. The shape, also, of the pelvis might affect by pressure the shape of

the head

certain parts

of the young in the womb. The laborious breathing necessary in high regions

would,

tends, as

we have

some

~~good~~

good

reason to believe,

increase

to increase

the size of the chest; and again correlation would come into play. The effects →OMIT of lessened exercise

with

together with

abundant food →on the whole organisation is probably still more important; and this, as H. von Nathusius has lately shown in his excellent Treatise, is apparently one chief cause of the great modification which the breeds of swine have undergone. Animals kept by savages in different countries often have to struggle for their own subsistence, and

would be

are

exposed to a certain extent to natural

selec- tion,

selection,

and individuals with slightly different constitutions would succeed best under different

climates;

and

there

reason

believe

that

constitution

and

colour

are

correlated.

↑ But we are far too ignorant to speculate on the relative importance of the several known and unknown

laws

causes

of variation; and I have →made these remarks only to show that, if we are unable to account for the characteristic differences of our

domestic

several domestic

breeds, which nevertheless

are

generally

admit

admitted

to have arisen through ordinary

generation,

generation

→from one or a few parent-stocks, we ought not to lay too much stress on our ignorance of the precise cause of the slight analogous differences between

species.

true species.

Utilitarian → Doctrine , how far true: → Beauty , how

acquired .

acquired.

acquired .

....

The foregoing remarks lead me to say a few words on the protest lately made by some naturalists, against the utilitarian doctrine that every detail of structure has been produced for the good of its possessor. They believe that

very

....

many structures have been created for →the sake of beauty, to delight

man,

man

→or the Creator (but this latter point is beyond the scope of scientific discussion), or for the sake of mere →variety, a view already discussed.