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parts of the world, 1859 1860 1861 1866 1869
regions, 1872

occur in the same order 1869 1872
are similarly absent 1859 1860 1861
are similarly placed 1866

yet seldom perceived by us, the whole economy of nature will be utterly obscured. Whenever we can precisely say why this species is more abundant in individuals than that; why this species and not another can be naturalised in a given country; then, and not
till
until
then, we may justly feel surprise why we cannot account for the extinction of
this
any
particular species or
group
any group
of species.
On
On
the
the
Forms
Forms
of
of
Life
Life
changing
changing
almost
almost
simultaneously
simultaneously
throughout
throughout
the
the
World .—
World.
World.
World .
Scarcely any palæontological discovery is more striking than the fact, that the forms of life change almost simultaneously throughout the world. Thus our European Chalk formation can be recognised in many distant parts of the world, under the most different climates, where not a fragment of the mineral chalk itself can be found;
namely
namely,
in North America, in equatorial South America, in Tierra del Fuego, at the Cape of Good Hope, and in the peninsula of India. For at these distant points, the organic remains in certain beds present an unmistakeable
degree of
....
resemblance to those of the Chalk. It is not that the same species are met with; for in some cases not one species is identically the same, but they belong to the same families, genera, and sections of genera, and sometimes are similarly characterised in such trifling points as mere superficial sculpture.
Moreover
Moreover,
other forms, which are not found in the Chalk of
Europe,
Europe
but which occur in the formations either above or below, occur in the same order at these distant points of the world. In the several successive palæozoic formations of Russia, Western
Europe
Europe,
and North America, a similar parallelism in the forms of life has been observed by several