| → I 1859 1860 1861 1866 1869 |
| with respect to important characters, I 1872 |
|
| → has, also, been 1859 1860 1861 1866 1869 |
| is often 1872 |
|
| → some of the 1859 1860 1861 1866 1869 |
| the same 1872 |
|
| → anomalies. 1859 1860 1861 1866 1869 |
| anomalies in the individuals. 1872 |
|
| → to find them still often 1859 1860 1861 1866 1869 |
| often to find them still 1872 |
|
| → the species of some other genus, are 1859 1860 1861 1866 |
| OMIT 1869 1872 |
|
| → characters; 1859 1860 1861 1866 |
| are called generic characters; 1869 1872 |
|
| → in common I 1859 1860 1861 1866 1869 |
| may be 1872 |
|
|
to this
in
chapter on Classification. It would be almost superfluous to adduce evidence in support of the
statement, that
characters are more variable than generic; but
→I
have repeatedly noticed in works on natural history, that when an author
with surprise that some
organ or part, which is generally very constant throughout
of species,
considerably in
species,
it
→has, also, been variable
in the individuals of
→some of the
species. And this fact shows that a character, which is generally of generic value, when it sinks in value and becomes only of specific value, often becomes variable, though its
importance may remain the same. Something of the same kind applies to monstrosities: at least Is. Geoffroy St. Hilaire
no doubt, that the more an organ normally differs in the different species of the same group, the more subject it is to
→anomalies.
|
|
| On the ordinary view of each species having been independently created, why should that part of the structure, which differs from the same part in other independently-created species of the same genus, be more variable than those parts which are closely alike in the several species? I do not see that any
can be given. But on the view
species
only strongly marked and fixed varieties, we might
expect
→to find them still often
continuing to vary in those parts of their structure which
varied within a moderately recent period, and which
thus come to differ. Or to state the case in another
the points in which all the species of a genus resemble each other, and in which they differ from
→the species of some other genus, are
→characters;
and these characters
→in common I
to
|
