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1859
1860
1861
1866
1869
1872

Compare with:
1859
1860
1861
1866
1872

and descendants. 1869 1872
or these parents from their ancient and unknown progenitor. 1859 1860 1861 1866

would be natural; for, on 1869 1872
on 1859 1860 1861 1866

for instance, from A, 1869 1872
from A, or from I, 1859 1860 1861 1866

Assuredly we shall 1869 1872
We shall certainly 1859 1860
We shall assuredly 1861 1866

descendants from 1869
many descendants from 1859 1860 1861 1866
descendants from any 1872

OMIT 1869 1872
although having few characters in common, 1859 1860 1861
although having but few characters in common, 1866

although 1869 1872
we use descent in classing acknowledged varieties, however different 1859 1860 1861 1866

have but few characters in common; we use descent in classing acknowledged varieties, however different they may be 1869 1872
be 1859 1860 1861 1866

several members of the several groups could be distinguished from their more immediate
parents;
parents
and descendants. Yet the
natural
....
arrangement in the diagram would still hold
good;
good
and,
and
would be natural; for, on the principle of inheritance, all the forms
descended
descended,
for instance, from A, would have something in common. In a tree we can
specify
distinguish
this or that branch, though at the actual fork the two unite and blend together. We could not, as I have said, define the several groups; but we could pick out types, or forms, representing most of the characters of each group, whether large or small, and thus give a general idea of the value of the differences between them. This is what we should be driven to, if we were ever to succeed in collecting all the forms in any
class
one class
which have lived throughout all time and space. Assuredly we shall never succeed in making so perfect a collection: nevertheless, in certain classes, we are tending
in
towards
this
direction;
end;
and Milne Edwards has lately insisted, in an able paper, on the high importance of looking to types, whether or not we can separate and define the groups to which such types belong.
Finally, we have seen that natural selection, which
follows
results
from the struggle for existence, and which almost inevitably
induces
leads to
extinction and divergence of character in the descendants from one
dominant
dominant
parent-species, explains that great and universal feature in the affinities of all organic beings, namely, their
sub-ordination
subordination
in group under group. We use the element of descent in classing the individuals of both sexes and of all
ages,
ages
OMIT under one
species;
species,
although they may have but few characters in common; we use descent in classing acknowledged varieties, however different they may be from their
parents;
parent;
and I believe
that this
this
element of descent is the hidden bond of connexion which naturalists have sought under the term of the Natural System.