Origin of Species Variorum

→ several of the 1859 1860 1861 1866

the same 1869 1872

→ differ 1859 1860 1861 1866 1869

of the same species differ 1872

→ of 1859 1860 1861 1866

belonging to 1869

belonging to other 1872

→ birds within 1859 1860 1861 1866 1869

with birds the individuals of 1872

→ country vary in a remarkably small degree, 1859 1860 1861 1866

country vary in a remark- ably small degree, 1869

species, inhabiting the same country, vary extremely little, 1872

→ seems to me certainly 1859 1860 1861 1866 1869

certainly seems 1872

→ In our domestic animals, if any part, or the whole animals, be neglected and no selection be applied, that part (for instance, the comb in the Dorking fowl) or the whole breed will cease to have a nearly uniform character. 1866

In our domestic animals, if any part, or the whole animal, be neglected and no selection be applied, that part (for instance, the comb in the Dorking fowl) or the whole breed will cease to have a nearly uniform character. 1859 1860 1861

First let me remark that if any part in our domestic animals, or the whole animal, be neglected and no selection be applied, that part (for instance, the comb in the Dorking fowl) or the whole breed will cease to have a uniform character. 1869

First let me make some preliminary remarks. 1872

→ The 1859 1860 1861 1866 1869

If, in our domestic animals, any part or the whole animal be neglected, and no selection be applied, that part (for instance, the comb in the Dorking fowl) or the whole 1872

→ then be said 1859 1860 1861 1866 1869

cease 1872

→ degenerated. 1859 1860 1861 1866 1869

a uniform character: and the breed may be said to be degenerating. 1872

word, very important structures, and they differ extremely little even in

distinct

different

genera; but in the several species of one genus, Pyrgoma, these valves present a marvellous amount of

diversification:

diversification;

the homologous valves in the different species being sometimes wholly unlike in shape; and the amount of variation in the individuals of →several of the species is so great, that it is no exaggeration to state that the varieties →differ more from each other in the characters

derived from

these important

organs,

valves

than do

the

other

species →of distinct genera.

As →birds within the same →country vary in a remarkably small degree, I have particularly attended to

them;

them,

and the rule →seems to me certainly to hold good in this class. I cannot make out that it applies to plants, and this would

have seriously

seriously have

shaken my belief in its truth, had not the great variability in plants made it particularly difficult to compare their relative degrees of variability.

When we see any part or organ developed in a remarkable degree or manner in

any

species, the fair presumption is that it is of high importance to that

species:

species;

nevertheless

it is

the part

in this case

eminently liable to variation. Why should this be so? On the view that each species has been independently created, with all its parts as we now see them, I can see no explanation. But on the view that groups of species

are

have

descended from

some other

other

species, and have been modified through natural selection, I think we can obtain some light. →In our domestic animals, if any part, or the whole animals, be neglected and no selection be applied, that part (for instance, the comb in the Dorking fowl) or the whole breed will cease to have a nearly uniform character. →The breed will →then be said to have →degenerated. In rudimentary organs, and in those which have been but little specialised for any particular