Origin of Species Variorum

→ variations; 1859 1860 1861

Variations; 1866 1869

Variations , 1872

→ some of the characters of 1859 1860 1861

some of the Characters of 1866 1869

a Character proper to 1872

→ species , 1860

species, 1859 1861

Species, 1866 1869

Species , 1872

→ progenitor. — These propositions will be most readily understood by looking to our domestic races. 1860

progenitor .— 1859 1861

Progenitor . 1866

Progenitor . 1869

Progenitor. — 1872

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

These propositions will be most readily understood by looking to our domestic races.

→ roots as commonly called, 1859 1860 1861 1866 1869

as commonly called roots, 1872

Distinct

Species

species

present

analogous

→ variations;

and

so that

and

Variety

variety

one

Species

species

often

assumes

→ some of the characters of

allied

→ species ,

reverts

some

the

Characters

characters

early

→ progenitor. — These propositions will be most readily understood by looking to our domestic races. ↑ The most distinct breeds of

the pigeon,

pigeons,

in countries

~~most~~

most

widely apart, present sub-varieties with reversed feathers on the

head,

head

and

with feathers

feathers

on the

feet, —

feet,—

characters not possessed by the aboriginal rock-pigeon; these then are analogous variations in two or more distinct races. The frequent presence of fourteen or even sixteen tail-feathers in the

pouter

pouter,

may be considered as a variation representing the normal structure of another race, the fantail. I presume that no one will doubt that all such analogous variations are due to the several races of the pigeon having inherited from a common parent the same constitution and tendency to variation, when acted on by similar unknown influences. In the vegetable kingdom we have a case of analogous variation, in the enlarged stems, or →roots as commonly called, of the Swedish turnip and Ruta baga, plants which several botanists rank as varieties produced by cultivation from a common parent: if this be not so, the case will then be one of analogous variation in two so-called distinct species; and to these a third may be added, namely, the common turnip. According to the ordinary view of each species having been independently created, we should have to attribute this similarity in the enlarged stems of these three plants, not to the vera causa of community of descent, and a consequent tendency to vary in a like manner, but to three separate yet closely related acts of creation.

With pigeons, however, we have another case, namely, the occasional appearance in all the breeds, of slaty-blue birds with two black bars on the wings,

white