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See page in:
1859
1860
1861
1866
1869
1872

Compare with:
1859
1860
1861
1869
1872

→ though ranked as distinct species, being closely related, 1859 1860 1861 1866
being closely related, though ranked as distinct species, 1869 1872
→ in any two 1866 1869 1872
two 1859 1860 1861
→ compared with Living Forms. 1866
Forms .— 1859 1860
compared with Living Forms. — 1861
compared with Living Forms. 1869
compared with Living Forms . 1872
→ tend 1866 1869 1872
constantly tend thus 1861
↑ 2 blocks not present in 1861 1866 1869 1872; present in 1859 1860
There has been much discussion whether recent forms are more highly developed than ancient. I will not here enter on this subject, for naturalists have not as yet defined to each other's satisfaction what is meant by high and low forms.
↑ 1 blocks not present in 1859 1860 1861 1866 1869 1872; present in
→ manner, 1866
sense the more recent forms must, on my theory, be higher than the more ancient; for each 1860
fact of
fact of
fossil remains from closely consecutive
formations
formations,
→though ranked as distinct species, being closely related, is obvious. As the accumulation of each formation has often been interrupted, and as long blank intervals have intervened between successive formations, we ought not to expect to find, as I attempted to show in the last chapter, in any one or →in any two
formations,
formations
all the intermediate varieties between the species which appeared at the commencement and close of these
periods:
periods;
but we ought to find after intervals, very long as measured by years, but only moderately long as measured geologically, closely allied forms, or, as they have been called by some authors, representative species; and these
we assuredly
assuredly we
do find. We find, in short, such evidence of the slow and scarcely sensible
mutations
mutation
of specific forms, as we have
the
a just
right to
expect
expect.
to
....
find.
....
On
On
the
the
state
State
State
of
of
Development
Development
of
of
Ancient
Ancient
→ compared with Living Forms.
We have seen in the fourth chapter that the degree of differentiation and specialisation of the parts
of
in
all
all
organic beings, when
come to
arrived at
maturity, is the best standard, as yet suggested, of their degree of perfection or highness. We have also seen
that
that,
as the specialisation of parts
and organs
and organs
is an advantage to each being, so natural selection will →tend to render the organisation of each being more specialised and perfect, and in this sense higher; not but that it may
and will
and will
leave many creatures with simple and unimproved structures fitted for simple conditions of life, and in some cases will even degrade or simplify the organisation, yet leaving such degraded beings better fitted for their new walks of life. ↑ ↑ In
a
another and
more general →manner,