Origin of Species Variorum

→ throughout the world, 1866

throughout the world, the 1859 1860 1861

certain 1869 1872

→ and on the temperate lowlands 1859 1860 1861 1866

OMIT 1869 1872

→ northern and southern hemispheres, are sometimes identically 1859 1860 1861 1866

tropics in all parts of the world, and on the temperate plains of the north and south, are either 1869 1872

→ but much oftener they are specifically distinct, though plainly related to each other in a remarkable manner. 1866

but they are much oftener specifically distinct, though related to each other in a most remarkable manner. 1859 1860 1861

identical species or varieties of the same species. 1869

species or varieties of the same species. 1872

↑ 2 blocks not present in 1859 1860 1861 1866; present in 1869 1872

It should, however, be observed that these plants are not strictly Arctic forms; for, as Mr. H. C. Watson has remarked, "in receding from polar towards equatorial latitudes, the Alpine or mountain floras really become less and less Arctic." Besides these identical and closely allied forms, many species inhabiting the same widely sundered areas, belong to genera not now found in the intermediate tropical lowlands.

→ some strictly 1859 1860 1861 1866

but some few 1869 1872

→ on the distribution of 1859 1860 1861 1866

in regard to 1869 1872

growing on the summits of the mountains of Borneo. Some of these Australian forms, as I hear from Dr. Hooker, extend along the heights of the peninsula of Malacca, and are thinly

scattered,

scattered

on the one hand over

India

India,

and on the other

hand as

far north as Japan.

On the southern mountains of Australia, Dr. F.

Müller

has discovered several European species; other species, not introduced by man, occur on the lowlands; and a long list can be given, as I am informed by Dr. Hooker, of European

genera,

general,

found in Australia, but not in the intermediate torrid regions. In the admirable 'Introduction to the Flora of New Zealand,' by Dr. Hooker, analogous and striking facts are given in regard to the plants of that large island. Hence we see

that

that,

→throughout the world, plants growing on the more lofty

mountains

mountains,

→and on the temperate lowlands of the →northern and southern hemispheres, are sometimes identically the

same

same;

→but much oftener they are specifically distinct, though plainly related to each other in a remarkable manner. ↑

These

This

brief

remarks apply

abstract applies

to plants

alone;

alone:

→some strictly analogous facts could be given →on the distribution of terrestrial animals. In marine productions, similar cases

likewise occur;

occur;

as an example, I may quote a

statement

remark

by the highest authority, Prof. Dana, that

"it

is certainly a wonderful fact that New Zealand should have a closer resemblance in its crustacea to Great Britain, its antipode, than to any other part of the

world."

Sir J. Richardson, also, speaks of the reappearance on the shores of New Zealand, Tasmania,

&c,

&c.,

of northern forms of fish. Dr. Hooker informs me that twenty-five species of Algæ are common to New Zealand and to Europe, but have not been found in the intermediate tropical seas.