Homologue:
the
same organ under every variety of
form
and function (true or essential
correspondence)
Analogy:
superficial
or misleading similarity
Richard
Owen 1843
“The natural system is based upon
descent with modification ..
the characters that naturalists
consider as showing
true affinity
(i.e. homologies) are those which
have been inherited from a common
parent, and, in so far as all true
classification is genealogical; that
community of descent is the
common bond that naturalists have
been seeking”
Charles
Darwin, Origin of species
1859 p. 413