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