See page in:
1859
1860
1861
1866
1869
1872

Compare with:
1859
1861
1866
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.

Palæozoic animals, though belonging to the same orders, families, or genera with those living at the present day, 1860 1861
palæozoic animals, though belonging to the same orders, families, or genera with those living at the present day, 1859
although palæozoic animals can certainly be classed under existing groups, yet that at this ancient period these groups 1866

at this early epoch limited in such distinct groups 1859 1860 1861
so distinctly separated from each other 1866

are. 1859 1860 1861
are at the present time. 1866

living 1859 1860 1861 1866 1869
any two living 1872

groups. 1859 1860 1861 1866 1869
groups of species. 1872

the 1859 1860 1861 1866 1869
or groups, the 1872

I apprehend that 1859 1860 1861 1866
OMIT 1869 1872

would have to 1859 1860 1861 1866
certainly 1869 1872

from each other 1859 1860 1861 1866
OMIT 1869 1872

of the same two groups would be distinguished 1859 1860 1861 1866
are separated 1869 1872

quite distinct, at that period made some small 1859 1860 1861 1866
quite distinct, made at that period a somewhat nearer 1869
made a somewhat nearer 1872

other. 1859 1860 1861 1866 1869
other than they now do. 1872

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
Palæozoic animals, though belonging to the same orders, families, or genera with those living at the present day, were not at this early epoch limited in such distinct groups as they
now
now
are.
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 meant that an extinct form is directly intermediate in all its characters between two living
forms
forms,
the objection is
probably
probably
valid. But I apprehend that in a
perfectly
perfectly
natural classification many fossil species would have to stand between living species, and some extinct genera between living genera, even between genera belonging to distinct families. The most common case, especially with respect to very distinct groups, such as fish and reptiles, seems to be,
that,
that
supposing them to be distinguished at the present day from each other by a
score of
dozen
characters, the ancient members of the same two groups would be distinguished by a somewhat lesser number of
characters;
characters,
so that the two
groups
groups,
though
though
formerly quite distinct, at that period made some small approach to each other.
It is a common belief that the more ancient a form is, by so much the more it tends to connect by some of its characters groups now widely separated from each other. This remark no doubt must be restricted to those groups which have undergone much change in the course of geological ages; and it would be difficult to prove the truth of the proposition, for every now and then even a living animal, as the Lepidosiren, is
dis- covered
discovered
having affinities directed towards very distinct groups. Yet if we compare the older Reptiles and