 What is rigidly designated by a kind term like ‘Apis mellifera’? Apparently it can not rigidly designate a scattered object comprised of all particular honeybees, say, since those honeybees that presently go about their work might not have existed. And others that do not exist might have existed instead (but controversy and complications attend this observation: see, e.g., Gómez-Torrente 2006; Zouhar 2009, p. 211). To be rigid, a term has to designate the same thing in all possible worlds.