Origin of Species Variorum

→ if we pick out 1859 1860 1861 1866 1869

OMIT 1872

→ the 1859 1860 1861 1866 1869

on the whole the 1872

→ teeth. 1859 1860 1861 1866 1869

teeth; but there are so many exceptions to this rule, as Mr. Mivart has remarked, that it has little value. 1872

→ correlation in leading to modifications of important structures, 1866

correlation in modifying important structures, 1859 1860 1861

variation and correlation, 1869

correlation and variation, 1872

→ of 1859 1860 1861 1866 1872

before referred to, of 1869

→ knows 1859 1860 1861 1866 1869

is familiar with 1872

→ abortion of parts 1859 1860 1861 1866

partial or complete abortion 1869 1872

→ been attributed by some authors to pressure, and the shape 1859 1860 1861 1866

been attributed by some authors to the pressure 1869

sometimes been attributed to the pressure 1872

→ seeds in the ray-florets in some Compositæ countenances this idea; but, in the case 1859 1860 1861 1866

involucra on the florets, or to their mutual pressure, and the shape 1869 1872

→ corolla of 1859 1860 1861 1866

seeds in the ray-florets of some Compositæ countenances this idea; but with 1869 1872

→ that the inner and outer flowers 1859 1860 1861 1866

which 1869 1872

→ differ. 1859 1860 1861 1866

differ in their inner and outer flowers. 1869 1872

→ certain other parts of the flower had 1859 1860 1861 1866

the reproductive organs had 1869

the reproductive organs 1872

→ in 1859 1860 1861 1866

this can hardly be the sole cause, for in 1869 1872

→ there is a difference in 1859 1860 1861 1866

OMIT 1869 1872

or less down on the young

birds

pigeon

bird

when first hatched, with the future colour of

their

its

plumage; or, again, the relation between the hair and teeth in the naked Turkish dog, though here

probably

no doubt

homology comes into play? With respect to this latter case of correlation, I think it can hardly be accidental,

that

that,

→if we pick out the two orders of

mammalia

mammals

which are most abnormal in their dermal

coverings,

covering,

viz.,

viz.

Cetacea (whales) and Edentata (armadilloes, scaly

anteaters,

ant-eaters,

&c.),

that these

~~these~~

these

are likewise →the most abnormal in their →teeth.

I know of no case better adapted to show the importance of the laws of →correlation in leading to modifications of important structures, independently of utility

and,

and

therefore,

therefore

of natural selection, than that →of the difference between the outer and inner flowers in some Compositous and Umbelliferous plants. Every one →knows the difference

between

the ray and central florets of, for instance, the daisy, and this difference is often accompanied with the →abortion of parts of the

reproductive organs.

flower.

But

But,

in some

of these

Compositous

plants, the seeds also differ in shape and

sculpture.

~~and~~

~~even~~

~~the~~

~~ovary~~

~~itself,~~

~~with~~

~~its~~

~~accessory~~

~~parts,~~

~~differs,~~

~~has~~

~~been~~

~~described~~

~~Cassini.~~

These differences have →been attributed by some authors to pressure, and the shape of the →seeds in the ray-florets in some Compositæ countenances this idea; but, in the case of the →corolla of the Umbelliferæ, it is by no means, as Dr. Hooker informs me,

the

species with the densest heads →that the inner and outer flowers most frequently →differ. It might have been thought that the development of the ray-petals by drawing nourishment from →certain other parts of the flower had

causes

caused

their abortion; but →in some Compositæ →there is a difference in the seeds of the outer and inner florets

differ without

differ, without

without

any difference in the corolla.

Possibly,

Possibly

these several

differences

differ- ences