Origin of Species Variorum

→ other, 1866 1869

other, 1859

other , 1860 1861

other , 1872

→ one grand natural system; 1859 1860 1861 1866

a few grand classes; 1869 1872

→ all fossils can 1859 1860 1861 1866

all extinct species can 1869

extinct species can all 1872

→ cannot be disputed. 1859 1860 1861 1866 1869

is certainly true; but as this statement has often been ignored or even denied, it may be well to make some remarks on this subject, and to give some instances. 1872

→ alone, 1859 1860 1861 1866 1869

species of the same class, 1872

→ With respect to the vertebrata, whole pages could be filled with striking illustrations from our great palæontologist, Owen, showing how 1866

With respect to the Vertebrata, whole pages could be filled with striking illustrations from our great palæontologist, Owen, showing how 1859 1860 1861

With respect to the vertebrata, whole pages could be filled with illustrations from Owen, showing how 1869

In the writings of Professor Owen we continually meet with the expression of generalised forms, as applied to 1872

→ between existing groups. 1859 1860 1861 1866 1869

the writings of Agassiz, of prophetic or synthetic types; and these terms imply that such forms are in fact intermediate or connecting links. 1872

→ the two 1859 1860 1861 1866 1869

two of the 1872

→ Owen has discovered 1859 1860 1861 1866 1869

OMIT 1872

→ that he 1859 1860 1861 1866 1869

have been disentombed that Owen 1872

→ of these two orders; 1859 1860 1861 1866

OMIT 1869 1872

↑ 5 blocks not present in 1859 1860 1861 1866 1869; present in 1872

The Ungulata or hoofed quadrupeds are now divided into the even-toed or odd-toed divisions; but the Macrauchenia of S. America connects to a certain extent these two grand divisions. No one will deny that the Hipparion is intermediate between the existing horse and certain older ungulate forms. What a wonderful connecting link in the chain of mammals is the Typotherium from S. America, as the name given to it by Professor Gervais expresses, and which cannot be placed in any existing order. The Sirenia form a very distinct group of mammals, and one of the most remarkable peculiarities in the existing dugong and lamentin is the entire absence of hind limbs, without even a rudiment being left; but the extinct Halitherium had, according to Professor Flower, an ossified thigh-bone "articulated to a well-defined acetabulum in the pelvis," and it thus makes some approach to ordinary hoofed quadrupeds, to which the Sirenia are in other respects allied. The cetaceans or whales are widely different from all other mammals, but the tertiary Zeuglodon and Squalodon, which have been placed by some naturalists in an order by themselves, are considered by Professor Huxley to be undoubtedly cetaceans, "and to constitute connecting links with the aquatic carnivora."

↑ 1 blocks not present in 1859 1860 1861 1866; present in 1869 1872

Another distinguished palæontologist, M. Gaudry, shows that very many of the fossil mammals discovered by him in Attica connect in the plainest manner existing genera.

→ although palæozoic animals can certainly be classed under existing groups, yet that at this ancient period these groups 1866

palæozoic animals, though belonging to the same orders, families, or genera with those living at the present day, 1859

Palæozoic animals, though belonging to the same orders, families, or genera with those living at the present day, 1860 1861

→ so distinctly separated from each other 1866

at this early epoch limited in such distinct groups 1859 1860 1861

→ are at the present time. 1866

are. 1859 1860 1861

→ living 1859 1860 1861 1866 1869

any two living 1872

→ groups. 1859 1860 1861 1866 1869

groups of species. 1872

the

Affinities

extinct

Extinct

Species

each

→ other,

and

living

Living

forms .—

forms. —

Forms .

Forms.

Let us now look to the mutual affinities of extinct and living species.

All

They

fall

all

~~fall~~

fall

into →one grand natural system; and this fact is at once explained on the principle of descent. The more ancient any form is, the more, as a general rule, it differs from living forms. But, as Buckland long ago remarked, →all fossils can be classed either in still existing groups, or between them. That the extinct forms of life help to fill up the

~~wide~~

wide

intervals between existing genera, families, and orders, →cannot be disputed.

For if

we confine our attention either to the living or to the extinct →alone, the series is far less perfect than if we combine both into one general system. →With respect to the vertebrata, whole pages could be filled with striking illustrations from our great palæontologist, Owen, showing how extinct

animals;

animals

and

fall

in →between existing groups. Cuvier ranked the Ruminants and Pachyderms, as →the two most distinct orders of

mammals:

mammals;

but →Owen has discovered so many fossil

links

links,

→that he has had to alter the whole

classification,

classification

→of these two orders; and has placed certain pachyderms in the same sub-order with

ruminants;

ruminants:

for example, he dissolves by

~~fine~~

fine

gradations the apparently wide

interval

difference

between the pig and the camel. ↑ ↑ In regard to the Invertebrata, Barrande, and a higher authority could not be named, asserts that he is every day taught

that

that,

→although palæozoic animals can certainly be classed under existing groups, yet that at this ancient period these groups were not →so distinctly separated from each other as they

now

....

→are at the present time.

Some writers have objected to any extinct

species,

species

or group of

species,

species

being considered as intermediate between →living

species,

species

or →groups. If by this term it is