condition will
generally generally 1860 1861 1866 1869 |
always be somewhat rare; for beings thus provided will commonly 1872 |
have been supplanted
....... 1866 1869 1872 | and exterminated 1860 1861 |
by their successors with the
same organ same organ 1866 1869 1872 | organ 1860 1861 |
in a more perfect
and developed condition, and consequently will not now exist. and developed condition, and consequently will not now exist. 1866 |
and developed condition. 1860 1861 |
state, and consequently will have become long ago extinct. 1869 1872 |
The wing of the penguin is of high service,
acting acting 1866 1869 1872 | and acts 1860 1861 |
as a fin; it may, therefore, represent the nascent state of the
wing; wing; 1866 1869 1872 | wings 1860 1861 |
....... 1866 1869 1872 | of birds; 1860 1861 |
not that I believe this to be the
case; case; 1861 1866 1869 1872 | case, 1860 |
it is more probably a reduced organ, modified for a new
function: function: 1860 1861 1866 1869 | function; 1872 |
the wing of the
Apteryx, Apteryx, 1866 1869 1872 | Apteryx 1860 1861 |
on the other hand, is quite on the other hand, is quite 1866 1869 1872 |
is 1860 1861 |
useless, and is truly rudimentary. The simple filamentary limbs of the Lepidosiren apparently are in a nascent state; for, as Owen has
recently remarked, recently remarked, 1866 | remarked, 1869 |
they are the "beginnings of organs which attain full functional development in higher vertebrates." ↑1 blocks not present in 1859 1860 1861 1866 1869; present in 1872 | Owen considers the simple filamentary limbs of the Lepidosiren as the "beginnings of organs which attain full functional development in higher vertebrates;" but, according to the view lately advocated by Dr. Günther, they are probably remnants, consisting of the persistent axis of a fin, with the lateral rays or branches aborted.
|
The mammary
glands glands 1860 1861 1866 1869 | glans 1872 |
of the
Ornithorhynchus Ornithorhynchus 1860 1861 1866 1872 | Ornitho-rhynchus 1869 |
may, may, 1860 1861 1866 | may 1869 1872 |
probably, probably, 1866 | perhaps, 1860 1861 | probably, 1869 1872 |
be considered, in comparison with
those of the those of the 1866 |
the udder of a 1860 1861 |
the udders of a 1869 1872 |
cow, as in a nascent
condition. condition. 1866 1869 1872 | state. 1860 1861 |
The ovigerous frena of certain cirripedes, which
are only slightly developed and which are only slightly developed and which 1860 1861 1866 1869 |
OMIT 1872 |
have ceased to give attachment to the
ova, ova, 1860 1861 1866 1869 | ova 1872 |
are are 1860 1861 1866 1869 |
and are feebly developed, are 1872 |
nascent branchiæ. Rudimentary organs
in the individuals of the same species in the individuals of the same species 1860 1861 1866 1872 |
OMIT 1869 |
are very liable to vary in
degree of degree of 1860 1861 1866 |
the degree of their 1872 |
OMIT 1869 |
development and in other
respects. respects. 1860 1861 1866 1872 |
respects in the individuals of the same species. 1869 |
Moreover, in Moreover, in 1860 1861 1866 1869 | In 1872 |
closely allied species,
the degree the degree 1860 1861 1866 1869 |
also, the extent 1872 |
to which the same organ has been
rendered rudimentary rendered rudimentary 1860 1861 1866 | reduced 1869 1872 |
occasionally differs much. This latter fact is well exemplified in the state of the wings
of of 1866 1872 | of the 1859 1860 1861 | in 1869 |
female moths
in certain groups. in certain groups. 1859 1860 1861 1866 1869 |
belonging to the same family. 1872 |
Rudimentary organs may be utterly aborted; and this implies, that
we find in an we find in an 1859 1860 1861 1866 |
in certain 1869 1872 |
animal animal 1859 1860 1861 1866 | animals 1869 1872 |
or
plant plant 1859 1860 1861 1866 | plants, 1869 1872 |
no trace of an organ, no trace of an organ, 1859 1860 1861 1866 |
parts are entirely absent 1869 1872 |
which analogy would lead us to expect to
find, find, 1859 1860 1861 1866 1869 | find 1872 |
and which is and which is 1859 1860 1861 1866 |
and which are 1869 |
in them, and which are 1872 |
occasionally found in monstrous
individuals individuals 1859 1860 1861 1866 | individuals. 1869 1872 |
of of 1859 1860 1861 1866 | of 1869 1872 |
the the 1859 1860 1861 1866 | the 1869 1872 |
species. species. 1859 1860 1861 1866 | species. 1869 1872 |
Thus in
some Scrophulariaceæ we rarely find even a rudiment of a some Scrophulariaceæ we rarely find even a rudiment of a 1866 |
the snapdragon (antirrhinum) we generally do not find a rudiment of a 1859 1860 1861 |
most of the Scrophulariaceæ the 1869 1872 |
fifth
stamen; stamen; 1859 1860 1861 1866 | stamen 1869 1872 |
but this may sometimes but this may sometimes 1859 1860 1861 1866 |
is utterly aborted; yet we may conclude that a fifth stamen once existed, for a rudiment of it is found in many species of the family, and this rudiment occasionally becomes perfectly developed, as may 1869 |
is utterly aborted; yet we may conclude that a fifth stamen once existed, for a rudiment of it is found in many species of the family, and this rudiment occasionally becomes perfectly developed, as may sometimes 1872 |
be
seen plainly or fully developed. seen plainly or fully developed. 1866 |
seen. 1859 1860 1861 |
seen in the common snap-dragon. 1869 1872 |
In tracing the homologies of
the same the same 1859 1860 1861 1866 | any 1869 1872 |
part in different
mem- bers mem- bers 1866 | members 1859 1860 1861 1869 1872 |
|