| → OMIT 1869 1872 |
| in all these cases clearly 1866 |
|
| → it 1869 1872 |
| intermediate links between the several forms thus produced 1866 |
|
| → that intermediate links connecting the several forms should now 1869 1872 |
| to 1866 |
|
| → OMIT 1869 1872 |
| of doubtful value, 1866 |
|
| → When, on the other hand, 1869 1872 |
| But when 1866 |
|
| → good chance 1869 1872 |
| chance, which is not rarely successful, 1866 |
|
| → OMIT 1869 1872 |
| go so far as to 1866 |
|
| ↑ 1 blocks not present in 1859 1860 1861 1869; present in 1866 1872 |
| It cannot, however, be disputed
that many forms, considered by highly-competent judges as varieties, have so perfectly the character of species
that they have been ranked
by other highly-competent judges
as good and true species.
|
|
| → they ought to be 1869 1872 |
| such slightly different forms are rightly 1866 |
|
| → rank; but space does not here permit me to discuss them. 1866 1869 1872 |
| rank. 1859 1860 1861 |
|
|
species. As the
→OMIT
on the insects having long fed on
distinct plants,
→it
cannot be expected
→that intermediate links connecting the several forms should now
be
The naturalist thus loses his best guide in determining whether to rank
doubtful forms as varieties or species. This likewise necessarily occurs with closely allied organisms,
→OMIT
which inhabit
continents or
islands.
→When, on the other hand,
an animal or plant ranges over the same
or inhabits many islands in the same archipelago, and presents different forms in the different areas, there is always a
→good chance
that intermediate forms
be discovered which
link together the extreme states; and these are then degraded to the rank of varieties. |
|
| Some few naturalists maintain that animals never present varieties; but then these same naturalists rank the slightest
as of specific value; and when
the
form is met with in two
countries, or in two
geological formations, they
→OMIT
believe that two
species are hidden under the same dress. The term species thus comes to be a mere useless
abstraction, implying and assuming a separate act of creation. ↑
It is certain that many forms, considered by highly-competent judges as varieties, so completely resemble species in character, that they have been thus ranked by other highly-competent judges. But to discuss whether
→they ought to be
called species or varieties, before any definition of these terms has been generally accepted, is vainly to beat the air. |
|
| Many of the cases of strongly-marked varieties or doubtful species well deserve consideration; for several interesting lines of argument, from geographical distribution, analogical variation, hybridism, &c., have been brought to bear
the attempt to determine their
→rank; but space does not here permit me to discuss them.
|
