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 1 2 |         there are three pairs of two each, superior and inferior,
 2 3 |  position by the use of at least two parts of the body; one part
 3 5 |       the four points of motion, two are wings in the one, hands
 4 6 |        but only of the remaining two pairs; the prior difference
 5 6 |        as you have division into two), and the other difference
 6 6 |      into four.~Since then these two pairs, the superior and
 7 7 |     changes of place by means of two or four points in their
 8 7 |      before when they are cut in two.~The explanation of their
 9 7 |    naturally are made to move at two or four points, and even
10 7 |      They go forward by means of two flexions. For in each of
11 7 |        part towards the tail the two hinder points. They look
12 7 |         look as if they moved at two points only, where they
13 7 |         the ground). Others have two fins only, for example conger-eels
14 7 |       kind of cestreus which has two fins, by its flexion in
15 8 |      bloodless), and if they had two or four they would be practically
16 9 | undulations (and this happens in two ways, either they undulate
17 9 |         is plain too that if the two curves were not greater
18 9 |          example eels, have only two. These swim by substituting
19 9 |       said before. Flat fish use two fins, and the flat of their
20 9 |         actual fins and with the two extremes or semicircles
21 11|         hunchbacked yet stand on two legs because their weight
22 11|          it looks as if they had two thighs, one in the leg before
23 12|        the foot would be made by two movements and those contrary
24 12|         the natural way with his two legs, bends them forward
25 14|    fashion, and neither of these two is satisfactory, they must
26 14|     their movements; if you take two consecutive pairs of legs
27 16|       bent obliquely, except the two extreme pairs. (These two
28 16|        two extreme pairs. (These two are more natural in their
29 18|        part, similarly fish have two pectoral fins; again, birds
30 18|        similarly, most fish have two fins on the under parts