See page in:
1859
1860
1861
1866
1869
1872

Compare with:
1859
1861
1866
1869
1872

having a longer 1859 1860 1861 1866 1869
the length of the 1872

reasoning or thinking 1859 1860 1861 1866
thought 1869 1872

1 blocks not present in 1859 1860 1861; present in 1866 1869 1872
As soon as the three Orchidean forms, Monachanthus, Myanthus, and Catasetum, which had previously been ranked as three distinct genera, were known to be sometimes produced on the same plant, they were immediately considered as varieties; and now I have been able to show that they are the male, female, and hermaphrodite forms of the same species.

he likewise includes 1859 1860 1861
he likewise does 1866
well as 1869 1872

solely because they closely resemble 1859 1860 1861
because they may closely resemble 1866
from their partial resemblance to 1869 1872

in the important character of having a longer beak, yet all are kept together from having the common habit of tumbling; but the short-faced breed has nearly or quite lost this
habit:
habit;
nevertheless, without any reasoning or thinking on the subject, these tumblers are kept in the same group, because allied in blood and alike in some other respects. If it could be proved that the Hottentot had descended from the Negro, I think he would be classed under the Negro group, however much he might differ in colour and other important characters from negroes.
With species in a state of nature, every naturalist has in fact brought descent into his classification; for he includes in his lowest grade,
or
or
that of
the
a
a
species, the two sexes; and how enormously these sometimes differ in the most important characters, is known to every naturalist: scarcely a single fact can be predicated in common of the
adult males
males
and hermaphrodites of certain cirripedes,
when adult,
when adult,
and yet no one dreams of separating them. The naturalist includes as one species the
various
several
larval stages of the same individual, however much they may differ from each other and from the
adult,
adult;
as he likewise includes the so-called alternate generations of Steenstrup, which can only in a technical sense be considered as the same individual. He includes
monsters
monsters;
and
he includes
varieties, not solely because they closely resemble the parent-form, but because they are descended from it. He who believes that the cowslip is descended from the primrose, or conversely, ranks them together as a single species, and gives a single definition. As soon as three Orchidean forms (Monochanthus, Myanthus, and Catasetum), which had
pre- viously
previously
been ranked as three distinct genera, were known to be sometimes produced on the same spike, they were immediately included as a single species.