Origin of Species Variorum

→ of 1861 1866 1869

at any two periods of 1872

→ world 1869

population of the world 1861 1866

world: if, for instance, 1872

→ two periods: if, for instance, at the 1861 1866 1869

OMIT 1872

→ is 1869 1872

will apparently for ever be 1861 1866

→ OMIT 1869 1872

under one important point of view 1861 1866

→ OMIT 1869 1872

the case of 1861 1866

→ we must believe, 1866 1869

we may believe, 1861

by the indigenes, we must believe, that 1872

→ in the course of time 1866 1869

that in the course of time 1861

OMIT 1872

→ become 1861 1866 1869

in the course of time become 1872

→ OMIT 1869

what we see now occurring in New Zealand, and from 1861

the progress of this displacement in New Zealand, and from 1866

the fact that 1872

→ well doubt whether, 1869 1872

doubt, 1861

well doubt, 1866

→ stand much higher in the scale 1869 1872

may be said to be higher 1861 1866

→ and several other highly competent judges insist 1869 1872

insists 1859 1860 1861 1866

the relative proportional numbers →of the high and low classes

throughout

the →world at

the

any

→two periods: if, for instance, at the present day

there be

....

fifty thousand kinds of vertebrate

animals,

animals

and

exist, and

if we knew that at some former period only ten thousand kinds

had

....

existed, we ought to look at this increase in number

the highest class, which implies a great displacement of lower forms, as a decided advance in the organisation of the

world,

whether

the

higher

the

lower

vertebrata

had

thus

largely

increased.

can

thus see how hopelessly difficult it →is to compare with perfect fairness, under such extremely complex relations, the standard of organisation of the imperfectly-known faunas of successive

periods

the

earth's

history.

We shall appreciate →OMIT this difficulty

~~the~~

the

more clearly, by looking to →OMIT certain existing faunas and floras. From the extraordinary manner in which European productions have recently spread over New Zealand, and have seized on places which must have been previously

occupied

occupied,

→we must believe,

that if

all the animals and plants of Great Britain were set free in New Zealand, →in the course of time a multitude of British forms would →become thoroughly

naturalized

naturalised

there, and would exterminate many of the natives. On the other hand, from →OMIT hardly a single inhabitant of the southern hemisphere

has

having

become wild in any part of Europe, we may →well doubt whether, if all the productions of New Zealand were set free in Great Britain,

whether

....

any considerable number would be enabled to seize on places now occupied by our native plants and animals. Under this point of view, the productions of Great Britain →stand much higher in the scale than those of New Zealand. Yet the most skilful

naturalist

naturalist,

from an examination of the species of the two

countries,

countries

could not have foreseen this result.

Agassiz →and several other highly competent judges insist that ancient animals resemble to a certain extent the embryos of recent animals

belonging to