or
instincts
of the
fertile
members,
which
alone
leave
descendants.
I am
surprised
that no
one has
advanced
this
demonstrative
case of
neuter
insects,
against
the
well-known
doctrine
of
Lamarck.
SUMMARY. I
have
endeavoured
briefly in
this
chapter to
show that
the mental
qualities
of our
domestic
animals
vary, and
that the
variations
are
inherited.
Still more
briefly I
have
attempted
to show
that
instincts
vary
