on on 1859 1860 1861 1866 1869 |
is intelligible on 1872 |
the view of an occasional cross being
indispensable, indispensable, 1859 1860 1861 1866 1869 | indispensable; 1872 |
by considering the medium in which terrestrial animals live, and by considering the medium in which terrestrial animals live, and 1859 1860 1861 1866 1869 |
for owing to 1872 |
the nature of the fertilising
element; element; 1859 1860 1861 1866 1869 | element 1872 |
for we know of for we know of 1859 1860 1861 1866 1869 |
there are 1872 |
no means, analogous to the action of insects and of the wind
in the case of in the case of 1859 1860 1861 1866 1869 |
with 1872 |
plants, by which an occasional cross could be effected with terrestrial animals without the concurrence of two individuals. Of aquatic animals, there are many self-fertilising hermaphrodites; but here
currents in the currents in the 1859 1860 1861 1866 1869 |
the currents of 1872 |
water offer an obvious means for an occasional cross.
And, as And, as 1859 1860 1861 1866 1869 | As 1872 |
in the case of flowers, I have as yet failed, after consultation with one of the highest authorities, namely, Professor Huxley, to discover a single
case of an case of an 1859 1860 1861 1866 1869 |
OMIT 1872 |
hermaphrodite animal with the organs of reproduction so perfectly enclosed
within the body, within the body, 1859 1860 1861 1866 1869 |
OMIT 1872 |
that access from
without without 1859 1860 1861 1866 1869 | without, 1872 |
and the occasional influence of a distinct
individual individual 1859 1860 1861 1866 1869 | individual, 1872 |
can be shown to be physically impossible. Cirripedes long appeared to me to
present present 1859 1860 1861 1866 1869 | present, 1872 |
a case of very great difficulty a case of very great difficulty 1859 1860 1861 1866 1869 |
OMIT 1872 |
under this point of
view; view; 1859 1860 1861 1866 1869 | view, 1872 |
but but 1859 1860 1861 1866 1869 |
a case of great difficulty; but 1872 |
I have been enabled, by a fortunate chance,
elsewhere elsewhere 1859 1860 1861 1866 1869 | elsewhere 1872 |
to prove that two individuals, though both are self-fertilising hermaphrodites, do sometimes cross. |
|
It must have struck most naturalists as a strange anomaly that,
in the case of both in the case of both 1859 1860 1861 1866 1869 |
both with 1872 |
animals and plants,
species species 1859 1860 1861 1866 1869 | some species 1872 |
of the same family and even of the same genus, though agreeing closely with each other in
almost almost 1859 1860 1861 1866 1869 | almost 1872 |
their whole organisation,
yet yet 1859 1860 1861 1866 1869 | yet 1872 |
are
not rarely, some of them not rarely, some of them 1859 1860 1861 1866 1869 |
OMIT 1872 |
hermaphrodites, and some
of them of them 1859 1860 1861 1866 1869 | of them 1872 |
unisexual. But if, in fact, all hermaphrodites do occasionally
intercross intercross 1859 1860 1861 1866 1869 | intercross, 1872 |
with other individuals, with other individuals, 1859 1860 1861 1866 1869 |
OMIT 1872 |
the difference between
hermaphrodites hermaphrodites 1859 1860 1861 1866 1869 | them 1872 |
and unisexual
species, species, 1859 1860 1861 1866 1869 | species 1872 |
as as 1859 1860 1861 1866 1869 | is, as 1872 |
far as function is concerned,
becomes becomes 1859 1860 1861 1866 1869 | becomes 1872 |
very small. |
|
From these several considerations and from the many special facts which I have collected, but which I am
not not 1859 1860 1861 1866 1869 | unable 1872 |
here
able able 1859 1860 1861 1866 1869 | able 1872 |
to give,
I am strongly inclined to suspect, that, both in the vegetable and animal kingdoms, I am strongly inclined to suspect, that, both in the vegetable and animal kingdoms, 1866 1869 |
I am strongly inclined to suspect that, both in the vegetable and animal kingdoms, 1859 1860 1861 |
it appears that with animals and plants 1872 |
an
|