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both, or what 1861 1866 1869 1872
what 1859 1860

something more 1859 1860 1861 1866 1869
some deeper bond 1872

something more is included, 1861 1866 1869
something more is included; 1859 1860
this is the case, 1872

hidden as it is 1859 1860 1861 1866 1869
which though observed 1872

that something more is meant by the Natural System; they believe that it reveals the plan of the Creator; but unless it be specified whether order in time or space, or both, or what else is meant by the plan of the Creator, it seems to me that nothing is thus added to our knowledge.
Expressions such
Such expressions
as that famous one
of
by
Linnæus,
and
and
which we often meet with in a more or less concealed form,
namely, that
that
the characters do not make the genus, but that the genus gives the characters, seem to imply that something more is included in our
classification,
classifications
classification
than mere resemblance. I believe that something more is included, and that
community
propinquity
of
descent,—
descent—
the
one
only
known cause of
close
the
similarity
in
of
organic
beings,—
beings—
is the bond, hidden as it is by various degrees of
modifi- cation,
modification,
which
which
is partially revealed to us by our classifications.
Let us now consider the rules followed in classification, and the difficulties which are
encountered
encountered,
on the view that classification either gives some unknown plan of creation, or is simply a scheme for enunciating general propositions and of placing together the forms most like each other. It might have been thought (and was in ancient times thought) that those parts of the structure which determined the habits of life, and the general place of each being in the economy of nature, would be of very high importance in classification. Nothing can be more false. No one regards the external similarity of a mouse to a shrew, of a dugong to a whale, of a whale to a fish, as of any importance. These resemblances, though so intimately connected with the whole life of the being, are ranked as merely "adaptive or analogical characters;" but to the consideration of these resemblances we shall
have to
have to
recur. It may even be given as a general rule, that the less any part of the organisation is concerned with special habits, the more important it becomes for classification. As an instance: