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See page in:
1859
1860
1861
1866
1869
1872

Compare with:
1859
1860
1866
1869
1872

→ now supposed to be represented in existing embryos, 1860 1861 1866
now supposed to be represented in many embryos, 1859
of the progenitor of the group 1872
OMIT 1869
→ in a long course of modification 1859 1860 1861
OMIT 1866 1869 1872
→ period of growth, or 1861 1869 1872
age, or 1859 1860
period of growth, nor 1866
→ of resemblance of ancient forms of life 1859 1860 1861 1866
may be true, but yet, owing 1869 1872
→ embryonic stages of recent forms, may be true, but yet, owing to the 1859 1860 1861 1866
OMIT 1869 1872
↑ 1 blocks not present in 1859 1860 1861 1866; present in 1869 1872
The law will not hold good in those cases in which an ancient form became adapted in its larval state to some special line of life, and transmitted the same larval state to a whole group of descendants; for these in their larval condition will not resemble any ancient form in its adult state.
→ slight modifications not appearing, 1859 1861
slight modifi- cations not appearing, 1860
slight modifications not having appeared, 1866
modifications 1869
variations 1872
→ at a very 1859 1860 1861 1866
not having appeared at an 1869
having appeared at a not very 1872
→ in the life of each, though perhaps caused at the earliest, and being 1859 1860 1861
in the life of each, though perhaps caused at the earliest, and having been 1866
of life, and having been 1869 1872
→ as 1859 1860 1861 1869 1872
of an animal as 1866
→ common parent-form of each 1859 1860 1861
progenitor, either in its adult or larval state, of all the members of the same 1866 1869 1872
→ Rudimentary , 1859 1860 1861
Rudimentary, 1866 1869
Rudimentary , 1872
→ atrophied , 1859 1860 1861
Atrophied, 1866 1869
Atrophied , 1872
→ Organs .— 1861
organs .— 1859
Organs — . 1860
Organs . 1866 1872
Organs . 1869
→ throughout 1859 1860 1861 1866
or even general, throughout 1869 1872
→ For instance, rudimentary mammæ are very general in the males of mammals: I presume that the "bastard-wing" 1859 1860 1861
For instance, rudimentary mammæ are very general with male mammals: I presume that the "bastard-wing" 1866
In the mammalia, for instance, the males always possess rudimentary mammæ; in snakes one lobe of the lungs is rudimentary; 1869
→ may be safely 1859 1860 1861 1866
the "bastard-wing" may safely be 1869
→ digit in 1859 1860 1861 1866
rudimentary digit, and in not a few species the wings cannot be used for flight or are reduced to 1869
→ Some of the cases of rudimentary organs are extremely curious; for instance, 1859 1860 1861 1866
What can be more curious than 1869
→now supposed to be represented in existing embryos, has
not
not
been
obliterated
wholly obliterated
wholly obliterated,
obliterated,
neither
either
by
the
the
successive variations →in a long course of modification having
super- vened
supervened
at a very early →period of growth, or by
such
the
variations having been inherited at an earlier
age
period
than that at which they first appeared. It should also be borne in mind, that the
supposed
supposed
law →of resemblance of ancient forms of life to the →embryonic stages of recent forms, may be true, but yet, owing to the geological record not extending far enough back in time, may remain for a long period, or for ever,
in- capable
incapable
of demonstration. ↑
Thus, as it seems to me, the leading facts in embryology, which are second
in importance
in importance
to none in
importance,
natural history,
are explained on the principle of →slight modifications not appearing, in the many descendants from some one ancient progenitor, →at a very early period →in the life of each, though perhaps caused at the earliest, and being inherited at a corresponding
not early
not early
period. Embryology rises greatly in interest, when we
thus
thus
look at the embryo →as a picture, more or less obscured, of the →common parent-form of each great
class.
class
of
of
animals.
animals.
→ Rudimentary , → atrophied ,
and
or
Aborted
aborted
→ Organs .—
Organs or parts in this strange condition, bearing the
plain stamp
stamp
of inutility, are extremely
common,
common
→throughout nature. →For instance, rudimentary mammæ are very general in the males of mammals: I presume that the "bastard-wing" in birds →may be safely considered as a →digit in a
rudiment.
rudimentary
state:
state:
in
in
very
very
many
many
snakes
snakes
one
one
lobe
lobe
of
of
the
the
lungs
lungs
is
is
rudimentary;
rudimentary;
in
in
other
other
snakes
snakes
there
there
are
are
rudiments
rudiments
of
of
the
the
pelvis
pelvis
and
and
hind
hind
limbs.
limbs.
→Some of the cases of rudimentary organs are extremely curious; for instance, the presence of teeth in fœtal whales, which when grown up have not a tooth in their heads;
or
and
the
presence of
presence of