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See page in:
1859
1860
1861
1866
1869
1872

Compare with:
1859
1860
1861
1866
1872

→ it would be difficult to prove it. 1859 1860 1861 1866 1869
difficult of proof. 1872
→ the same rule in 1869 1872
it, if we compare 1859 1860 1861 1866
→ of the inhabitants of fresh water, for many of the genera in the most distinct classes 1869 1872
fresh-water productions, in which so many genera 1859 1860 1861 1866
→ all, but that some of 1869 1872
in world- ranging genera all 1859
in world-ranging genera all 1860 1861
all 1866
→ in the genera which range very widely, have themselves very wide ranges. 1869
have a wide range, or even that they have on an average a wide range; but only that some of the species 1859 1860 1861
in world-ranging genera, but that some of them, 1866
have very wide ranges in the genera which 1872
→ Nor is it meant that 1866 1869 1872
For instance, two varieties of the same species inhabit America and Europe, and 1859 1860 1861
→ in such genera have on an average a very wide range; for this will largely depend on how far the process of modification has gone; for instance, 1869 1872
thus has an immense range; but, if the variation had been a little greater, the 1859 1860 1861
have on an average a very wide range; for this will largely depend on how far the process of modification has gone; for instance, 1866
→ of the same species inhabit America and Europe, and thus the species has an immense range; but, if variation were to be carried a little further, the two varieties would be ranked as distinct species, 1869 1872
would have been ranked as distinct species, 1859 1860 1861
of the same species inhabit America and Europe, 1866
→ the range 1869
the common range 1859 1860 1861
the species thus has an immense range; but, if the variation had been carried a little further, the two varieties 1866
their range 1872
→ greatly 1859 1860 1861 1869 1872
ranked as distinct species, and the range would have been greatly 1866
→ the same genus, though now 1869
a genus having descended from a single parent, though now 1859 1860 1861 1866
a genus, though 1872
→ are descended from a single progenitor, we 1869 1872
we 1859 1860 1861 1866
↑ 1 blocks not present in 1859 1860 1861 1866 1869; present in 1872
We should bear in mind that many genera in all classes are of ancient origin, and the species in this case will have had ample time for dispersal and subsequent modification.
→ We 1869
In considering the wide distribution of certain genera, we 1859 1860 1861 1866
→ in relation to all organic beings that many genera are of very ancient origin, and the species in this case 1869
that some are extremely ancient, and must have branched off from a common parent at a remote epoch; so that in such cases there 1859 1860
that some are extremely ancient, and that the species must have branched off from a common parent at a remote epoch; so that in such cases there 1861
that some of them are extremely ancient, and that their species will have branched off from a common progenitor at a remote epoch; so that in these cases there 1866
→ dispersal and subsequent modification. 1869
great climatal and geographical changes and for accidents of transport; and consequently for the migration of some of the species into all quarters of the world, where they may have become slightly modified in relation to their new conditions. 1859 1860 1861
great climatal and geographical changes and for accidents of transport; consequently for the migration of some of the species into all quarters of the world, where they will have become slightly modified in relation to their new conditions. 1866
→it would be difficult to prove it. Amongst mammals, we see it strikingly displayed in Bats, and in a lesser degree in the Felidæ and Canidæ. We see →the same rule in the distribution of butterflies and beetles. So it is with most →of the inhabitants of fresh water, for many of the genera in the most distinct classes range over the world, and many
individual
of the
species have enormous ranges. It is not meant that →all, but that some of the species →in the genera which range very widely, have themselves very wide ranges.
range
....
very
....
widely;
widely.
....
for
OMIT
....
the
OMIT
....
facility
OMIT
....
with
OMIT
....
which
OMIT
....
widely-ranging
OMIT
....
species
OMIT
....
vary
OMIT
....
and
OMIT
....
give
OMIT
....
rise
OMIT
....
to
OMIT
....
new
OMIT
....
forms
OMIT
....
will
OMIT
....
largely
OMIT
....
determine
OMIT
....
their
OMIT
....
average
OMIT
....
range.
OMIT
....
→Nor is it meant that the species →in such genera have on an average a very wide range; for this will largely depend on how far the process of modification has gone; for instance, two varieties →of the same species inhabit America and Europe, and thus the species has an immense range; but, if variation were to be carried a little further, the two varieties would be ranked as distinct species, and →the range would
have been
be
→greatly reduced. Still less is it meant, that
a
....
species which
apparently has
have
the capacity of crossing barriers and ranging
widely,
widely
as in the case of certain powerfully-winged birds, will necessarily range widely; for we should never forget that to range widely implies not only the power of crossing barriers, but the more important power of being victorious in distant lands in the struggle for life with foreign associates. But
on
according to
the view
of
that
all the species of →the same genus, though now distributed
to
at
the most remote points of the world, →are descended from a single progenitor, we ought to find, and I believe as a general rule we do find, that some at least of the species range very
widely;
widely.
for
....
it
....
is
....
necessary
....
that
....
the
....
unmodified
....
parent
....
should
....
range
have ranged
....
widely,
....
undergoing
....
modification
....
during
....
its
....
diffusion,
....
and
....
should
....
place
have placed
....
itself
....
under
....
diverse
....
conditions
....
favourable
....
for
....
the
....
conversion
....
of
....
its
....
offspring,
....
firstly
first
....
into
....
new
....
varieties
....
and
....
ultimately
....
into
....
new
....
species.
....
↑
→We should bear in mind →in relation to all organic beings that many genera are of very ancient origin, and the species in this case will have
been
had
ample time for →dispersal and subsequent modification. There
is,
is
also,
also
some
....
reason to believe from geological
evidence
evidence,
that