Thus, the windpipe of

the creature is exceptionally long, and the oesophagus is longer
still, and the windpipe commences so close to the mouth that the
tongue appears to be underneath it; and the windpipe seems to
project over the tongue, owing to the fact that the tongue draws
back into a sheath and does not remain in its place as in other
animals. The tongue, moreover, is thin and long and black, and can
be protruded to a great distance. And both serpents and saurians
have this altogether exceptional property in the tongue, that it is
forked at the outer extremity, and this property is the more marked in
the serpent, for the tips of his tongue are as thin as hairs. The
seal, also, by the way, has a split tongue.