Origin of Species Variorum

→ there 1859 1860 1861 1866

and young birds hatched, 1869 1872

→ land-shells, 1859 1860 1861 1866

species of land-shells, 1869 1872

→ In many other instances, as in the several districts of the same continent, 1859 1860 1861 1866

On the same continent, 1872

OMIT 1869

→ species under 1859 1860 1861 1866

the species which inhabit different districts with nearly 1869 1872

→ conditions of life. 1859 1860 1861 1866

physical conditions on the same continent. 1869

physical conditions. 1872

→ plants. 1859 1860 1861 1866 1869

plants; so it is, according to Mr. Bates, with the butterflies and other animals inhabiting the great, open, and continuous valley of the Amazons. 1872

→ principle which determines 1859 1860 1861 1866

same principle which governs 1869 1872

→ fauna and flora 1859 1860 1861 1866

inhabitants 1869 1872

→ that the inhabitants, when not identically the same, yet are plainly related 1859 1860 1861 1866

their relation 1869

the relation 1872

→ inhabitants of that region 1859 1860 1861 1866

source 1869 1872

→ derived,— the colonists having been subsequently modified and better fitted to their new homes,— 1859 1860 1861 1866

most easily derived, together with their subsequent modification, 1869 1872

should it succeed in establishing itself there? We may safely infer that Charles Island is well stocked with its own species, for annually more eggs are laid →there than can possibly be reared; and we may infer that the mocking-thrush peculiar to Charles Island is at least as well fitted for its home as is the species peculiar to Chatham Island. Sir C. Lyell and Mr. Wollaston have communicated to me a remarkable fact bearing on this subject; namely, that

Maderia

Madeira

and the adjoining islet of Porto Santo possess many distinct but representative →land-shells, some of which live in crevices of stone; and although large quantities of stone are annually transported from Porto Santo to

Maderia,

Madeira,

yet this latter island has not become colonised by the Porto Santo species: nevertheless both islands have been colonised by

~~some~~

some

European land-shells, which no doubt had some advantage over the indigenous species. From these considerations I think we need not greatly marvel at the endemic

~~and representative~~

and representative

species

species,

which inhabit the several islands of the Galapagos Archipelago, not having

all

universally

spread from island to island. →In many other instances, as in the several districts of the same continent,

Preoccupation

also, preoccupation

pre-occupation

has

also probably

probably

played an important part in checking the commingling of →species under the same →conditions of life. Thus, the south-east and south-west corners of Australia have nearly the same physical conditions, and are united by continuous land, yet they are inhabited by a vast number of distinct mammals, birds, and →plants.

The →principle which determines the general character of the →fauna and flora of oceanic islands, namely, →that the inhabitants, when not identically the same, yet are plainly related to the →inhabitants of that region whence colonists could

~~most readily~~

most readily

have been →derived,— the colonists having been subsequently modified and better fitted to their new homes,—