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

get distinguished.

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.





-THE END-