which I
had
dissected
from the
workers of
the
several
sizes.
With these
facts
before me,
I believe
that
natural
selection,
by acting
on the
fertile
parents,
could form
a species
which
should
regularly
produce
neuters,
either all
of large
size with
one form
of jaw, or
all of
small size
with jaws
having a
widely
different
structure;
or lastly,
and this
is our
climax of
difficulty,
one set of
workers of
one size
and
structure,
and
simultaneously
