54

Logic II 47

we see new animals, does not the first glance, that is, the first impression
made upon us by their form, give us a very correct idea of
their nearest relationship? ... So form is characteristic of families
... I do not mean the mere outline, but form as determined by
structure" pp. 159, 160]

Genera by the details of the execution in special parts;

Species by the relations of individuals to one another and to
the world in which they live, as well as by the properties of their
parts, their ornamentation, etc.

{Section title: All Classification is governed by Ideas.}

All classification, whether artificial or natural, is the
arrangement of objects according to ideas. A natural classification
is the arrangement of them according to those
ideas from which their existence results. No greater merit can a
taxonomist have than that of having his eyes open to the
ideas in nature; no greater more deplorable blindness can
strike afflict him than that of not seeing that there are
ideas in nature which determine the existence of objects.