The same difference in size of the sexes is found
in fishes, as, for instance, in the smaller cartilaginous fishes, in
the greater part of the gregarious species, and in all that live in
and about rocks. The fact that the female is longer-lived than the
male is inferred from the fact that female fishes are caught older
than males. Furthermore, in all animals the upper and front parts
are better, stronger, and more thoroughly equipped in the male than in
the female, whereas in the female those parts are the better that
may be termed hinder-parts or underparts. And this statement is
applicable to man and to all vivipara that have feet. Again, the
female is less muscular and less compactly jointed, and more thin
and delicate in the hair-that is, where hair is found; and, where
there is no hair, less strongly furnished in some analogous substance.
And the female is more flaccid in texture of flesh, and more
knock-kneed, and the shin-bones are thinner; and the feet are more
arched and hollow in such animals as are furnished with feet. And with
regard to voice, the female in all animals that are vocal has a
thinner and sharper voice than the male; except, by the way, with
kine, for the lowing and bellowing of the cow has a deeper note than
that of the bull.
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