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1859
1860
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1866
1869
1872

Compare with:
1859
1860
1866
1869
1872

of 1859 1860 1861 1866
and form of 1869 1872

of correlation is very 1859 1860 1861 1866
of correlation is 1869
is 1872

the 1859 1860 1861 1872
in cats the 1866 1869

between blue eyes and deafness 1859 1860 1861
between complete whiteness with blue eyes and deafness, 1866 1869
OMIT 1872

in cats, and 1859 1860 1861
or between 1866 1869
in cats between complete whiteness and blue eyes with deafness, or between 1872

the 1859 1860 1861
or in pigeons between their 1866 1869 1872

in pigeons, and 1859 1860 1861
and between 1866
or between 1869 1872

if we pick out 1859 1860 1861 1866 1869
OMIT 1872

the 1859 1860 1861 1866 1869
on the whole the 1872

teeth. 1859 1860 1861 1866 1869
teeth; but there are so many exceptions to this rule, as Mr. Mivart has remarked, that it has little value. 1872

correlation in modifying important structures, 1859 1860 1861
correlation in leading to modifications of important structures, 1866
variation and correlation, 1869
correlation and variation, 1872

of 1859 1860 1861 1866 1872
before referred to, of 1869

knows 1859 1860 1861 1866 1869
is familiar with 1872

abortion of parts 1859 1860 1861 1866
partial or complete abortion 1869 1872

been attributed by some authors to pressure, and the shape 1859 1860 1861 1866
been attributed by some authors to the pressure 1869
sometimes been attributed to the pressure 1872

according to Schlegel, the
form
shape
of the body and the manner of swallowing determine the position of several of the most important viscera.
The nature of the bond of correlation is very frequently quite obscure. M. Is. Geoffroy St. Hilaire has forcibly remarked, that certain malconformations
very
very
frequently, and that others
rarely,
rarely
co-exist,
coexist,
without our being able to assign any reason. What can be more singular than the relation between blue eyes and deafness in cats, and the tortoise-shell colour
and
with
the female sex; the feathered feet and skin
betwixt
between
the outer
toes,
toes
in pigeons, and the presence of more or less down on the young
bird
pigeon
birds
when first hatched, with the future colour of
its
their
plumage; or, again, the relation between the hair and teeth in the naked Turkish dog, though here
no doubt
probably
homology comes into play? With respect to this latter case of correlation, I think it can hardly be accidental,
that,
that
if we pick out the two orders of
mammals
mammalia
which are most abnormal in their dermal
coverings,
covering,
viz.,
viz.
Cetacea (whales) and Edentata (armadilloes, scaly
anteaters,
ant-eaters,
&c.),
these
that these
that these
are likewise the most abnormal in their teeth.
I know of no case better adapted to show the importance of the laws of correlation in modifying important structures, independently of utility
and
and,
therefore
therefore,
of natural selection, than that of the difference between the outer and inner flowers in some Compositous and Umbelliferous plants. Every one knows the difference
between
in
the ray and central florets of, for instance, the daisy, and this difference is often accompanied with the abortion of parts of the
reproductive organs.
flower.
But
But,
in some
of these
Compositous
plants, the seeds also differ in shape and
sculpture.
sculpture;
and
and
even
even
the
the
ovary
ovary
itself,
itself,
with
with
its
its
accessory
accessory
parts,
parts,
differs,
differs,
as
as
has
has
been
been
described
described
by
by
Cassini.
Cassini.
These differences have been attributed by some authors to pressure, and the shape