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 1 3 |     In both these changes the moving creature always changes
 2 3 |     quickly for that which is moving upon it to lean against
 3 3 |  resistance at all to what is moving, the latter can of itself
 4 4 |       and if it be set on the moving side, which is the original
 5 6 |       part which connects the moving parts with one another.
 6 6 | movement backwards, nor has a moving animal any division whereby
 7 7 |   ought to conceive snakes as moving in concave curves (undulations)
 8 10|     man does not walk without moving his shoulders. Everything
 9 11|   would be useless to it when moving naturally. And Nature makes
10 12| progression with this mode of moving the feet. Moreover, it is
11 14|    must move criss-cross; for moving in the way we have said
12 14|    see this if you watch them moving slowly. Even crabs move
13 17|    the way of those that were moving.~Fishes of the flat kind
14 19|    Now observation shows them moving. We must, I think, treat
15 19|    class as mutilated, and as moving in the way in which limbed
16 19|       to nature. They are not moving things, but are moving if
17 19|    not moving things, but are moving if as sedentary creatures