See page in:
1859
1860
1861
1866
1869
1872

Compare with:
1859
1860
1866
1869
1872

our palæntological collections— 1861
our palæontological collections— 1859 1860 1866
time as estimated by years— 1869 1872

granitic areas— 1861 1866
geological formations— 1859 1860
our palæontological collections— 1869 1872

geological formations— 1861 1866 1872
intermediate varieties in any one formation— 1859 1860
granitic areas— 1869

absence of intermediate varieties in any one formation— On the 1861 1866
sudden appearance of groups of species— On their 1859 1860
intermittence of geological formations— On the absence of intermediate varieties in any one formation— On the 1869
denudation of granitic areas— On the absence of intermediate varieties in any one formation— On the 1872

of groups of species— On their sudden appearance in 1861 1866 1869 1872
in 1859 1860

strata. 1859 1860 1861 1866
strata— Antiquity of the habitable earth. 1869 1872

CHAPTER
X.
IX.
ON THE IMPERFECTION OF THE GEOLOGICAL RECORD.
On the absence of intermediate varieties at the present day— On the nature of extinct intermediate varieties; on their number— On the
vase
vast
vast
lapse of time, as inferred from the rate of
denudation
deposition
and of
deposition—
deposition —
denudation—
On the
lapse
poorness
of our palæntological collections— On the
intermittence
poorness
denudation
of granitic areas— On the
absence
denudation
intermittence
of geological formations— On the absence of intermediate varieties in any one formation— On the sudden appearance of groups of species— On their sudden appearance in the lowest known fossiliferous strata.
IN the sixth chapter I enumerated the chief objections which might be justly urged against the views maintained in this volume. Most of them have now been discussed. One, namely the distinctness of specific forms, and their not being blended together by innumerable transitional links, is a very obvious difficulty. I assigned reasons why such links do not commonly occur at the present
day
day,
under the circumstances apparently most favourable for their presence, namely on an extensive and continuous area with graduated physical conditions. I endeavoured to show, that the life of each species depends in a more important manner on the presence of other already defined organic forms, than on climate; and, therefore, that the really governing conditions of life do not graduate away quite insensibly like heat or moisture. I endeavoured, also, to show that intermediate varieties, from existing in lesser numbers than the forms which they connect, will generally be beaten out and exterminated during the course of further modification and improvement. The