| → organic beings 1859 1860 1861 1866 |
| these organic beings which are 1869 |
| these organic beings, which are 1872 |
|
| → choose to suppose that any of the 1859 1860 1861 1866 |
| suppose any 1869 1872 |
|
| → I have been 1859 1860 1861 1866 |
| I to have been 1869 |
| I, to have become 1872 |
|
| → more or less completely lost 1859 1860 1861 1866 |
| lost all 1869 1872 |
|
| → have been more or less completely lost,— as sometimes 1859 1860 1861 1866 |
| likewise be lost,— as 1869 |
| be lost, as 1872 |
|
| → existing 1859 1860 1861 1866 |
| some few existing 1869 1872 |
|
| ↑ 3 blocks not present in 1859 1860 1861 1866 1869; present in 1872 |
| But this genus, though much isolated, will still occupy its proper intermediate position.
The representation of the groups, as here given in the diagram on a flat surface, is much too simple.
The branches ought to have diverged in all directions.
|
|
| z
14
)
on the uppermost horizontal line. Now all these modified descendants from a single species, are
related in blood or descent
the same degree; they may metaphorically be called cousins to the same millionth degree; yet they differ widely and in different degrees from each other. The forms descended from A, now broken up into two or three families, constitute a distinct order from those descended from I, also broken up into two families. Nor can the existing species, descended from A, be ranked in the same genus with the parent A; or those from I, with the parent I. But the existing genus
F
14
may be supposed to have been but slightly modified; and it will then rank with the parent-genus F; just as some few still living
belong to Silurian genera. So that the
value of the differences between
→organic beings
all related to each other in the same degree in blood, has come to be widely different. Nevertheless their genealogical
arrangement
remains strictly true, not only at the present time, but at each successive period of descent. All the modified descendants from A will have inherited something in common from their common parent, as will all the descendants from I; so will it be with each subordinate branch of descendants, at each successive
If, however, we
→choose to suppose that any of the
of
or of
→I have been
so much modified as to have
→more or less completely lost
traces of
parentage, in this case,
in
natural
will
→have been more or less completely lost,— as sometimes
seems to have occurred with
→existing
organisms. All the descendants of the genus F, along its whole line of descent, are supposed to have been but little modified, and they
form a single genus. ↑
But this genus, though much isolated, will still occupy
|
