Origin of Species Variorum

→ OMIT 1869 1872

may here add, that I 1859 1860 1861 1866

→ give only 1872

only briefly give 1859 1860 1861 1866

only give 1869

→ the same 1869 1872

several of the 1859 1860 1861 1866

→ of the same species differ 1872

differ 1859 1860 1861 1866 1869

→ belonging to other 1872

of 1859 1860 1861 1866

belonging to 1869

→ with birds the individuals of 1872

birds within 1859 1860 1861 1866 1869

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

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

country vary in a remark- ably small degree, 1869

→ certainly seems 1872

seems to me certainly 1859 1860 1861 1866 1869

→ First let me make some preliminary remarks. 1872

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

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

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

→ 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

The 1859 1860 1861 1866 1869

→ cease 1872

then be said 1859 1860 1861 1866 1869

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

degenerated. 1859 1860 1861 1866 1869

→ those points in our domestic animals, 1869 1872

in our domestic animals those points, 1859 1860 1861 1866

hermaphrodite cirripedes;

and

....

I →OMIT particularly attended to Mr.

Waterhouses

Waterhouse's

remark, whilst investigating this Order, and I am fully convinced that the rule almost

invariably

always

holds

good

good.

with

....

cirripedes.

....

I shall, in

future work, give a list of

the

all the

more remarkable cases; I will here →give only one, as it illustrates the rule in its largest application. The opercular valves of sessile cirripedes (rock barnacles) are, in every sense of the word, very important structures, and they differ extremely little even in

different

distinct

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 →the same species is so great, that it is no exaggeration to state that the varieties →of the same species differ more from each other in the characters

derived from

these important

valves

organs,

than do

other

the

species →belonging to other distinct genera.

As →with birds the individuals of the same →species, inhabiting the same country, vary extremely little, I have particularly attended to

them,

them;

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

seriously have

have seriously

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

the part

it is

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

have

are

descended from

other

some other

species, and have been modified through natural selection, I think we can obtain some light. →First let me make some preliminary remarks. →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 breed will →cease to have →a uniform character: and the breed may be said to be degenerating. In rudimentary organs, and in those which have been but little specialised for any particular purpose, and perhaps in polymorphic groups, we see a nearly parallel

natural

....

case; for in such cases natural selection either has not or cannot

come

have come

into full play, and thus the

organization

organisation

is left in a fluctuating condition. But what here

more especially

~~more particularly~~

more particularly

concerns us is, that →those points in our domestic animals, which at the present time are undergoing rapid change by continued selection, are also eminently liable to variation. Look at