On The Gait Of Animals
As to right and left, crabs, too, show the distinction poorly, still
they do show it. You can see it in the claw; the right claw is
larger and stronger, as though the right and left sides were trying to
The structure of animals, both in their other parts, and
especially in those which concern progression and any movement in
place, is as we have now described. It remains, after determining
these questions, to investigate the problems of Life and Death.