areas
.
areas
.
1860 |
areas
,
1859 1861 |
Areas,
1866 1869 |
Areas
,
1872 |
during
during
1859 1860 1861 |
during
1866 1869 1872 |
the
the
1859 1860 1861 |
the
1866 1869 1872 |
later
later
1859 1860 1861 |
later
1866 1869 1872 |
tertiary
tertiary
1859 1860 1861 |
tertiary
1866 |
Tertiary
1869 1872 |
periods.
—
periods.
—
1860 1861 |
periods
.—
1859 |
periods
. 1866 |
periods. 1869 |
periods 1872 |
|
Mr. Clift many years ago showed that the fossil mammals from the Australian caves were closely allied to the living marsupials of that continent. In South America, a similar relationship is manifest, even to an uneducated eye, in the gigantic pieces of
armour armour 1859 1860 1861 | armour, 1866 1869 1872 |
like those of the armadillo, found in several parts of La Plata; and Professor Owen has shown in the most striking manner that most of the fossil mammals, buried there in such numbers, are related to South American types. This relationship is even more clearly seen in the wonderful collection of fossil bones made by MM. Lund and Clausen in the caves of Brazil. I was so much impressed with these facts that I strongly insisted, in 1839 and 1845, on this "law of the succession of types,"— on "this wonderful relationship in the same continent between the dead and the living." Professor Owen has subsequently extended the same generalisation to the mammals of the Old World. We see the same law in this
author's author's 1859 1860 1861 1866 1872 | authors 1869 |
restorations of the extinct and gigantic birds of New Zealand. We see it also in the birds of the caves of Brazil. Mr. Woodward has shown that the same law holds good with
sea-shells, sea-shells, 1859 1860 1861 1866 1869 | sea shells, 1872 |
but but 1859 1860 1861 | but, 1866 1869 1872 |
from the wide distribution of most
genera of genera of 1859 1860 1861 1866 1869 | genera of 1872 |
molluscs, it is not well displayed by them. Other cases could be added, as the relation between the extinct and living land-shells of Madeira; and between the extinct and living
brackish-water shells brackish-water shells 1859 1860 1861 1866 1869 | brackish water-shells 1872 |
of the Aralo-Caspian Sea. |
|
Now what does this remarkable law of the succession of the same types within the same areas mean? He would be a bold
man, man, 1859 1860 1861 1866 1869 | man 1872 |
who who 1859 1860 1861 | who, 1866 1869 1872 |
after comparing the present climate of Australia and of parts of South
America America 1859 1860 1861 1866 1869 | America, 1872 |
under the same latitude, would attempt to account, on the one
hand, hand, 1859 1860 1861 1866 1869 | hand 1872 |
by by 1859 1860 1861 1866 1869 | through 1872 |
dissimilar physical
conditions conditions 1859 1860 1861 | conditions, 1866 1869 1872 |
for the dissimilarity of the inhabitants of these two
continents, continents, 1859 1860 1861 1866 1869 | continents; 1872 |
|