Sea-lice are uniform in shape
and universal in locality, and are particularly numerous on the body
of the red mullet. And all these insects are multipedal and devoid
of blood.
The parasite that feeds on the tunny is found in the region of
the fins; it resembles a scorpion, and is about the size of a
spider. In the seas between Cyrene and Egypt there is a fish that
attends on the dolphin, which is called the 'dolphin's louse'. This
fish gets exceedingly fat from enjoying an abundance of food while the
dolphin is out in pursuit of its prey.
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Other animalcules besides these are generated, as we have
already remarked, some in wool or in articles made of wool, as the ses
or clothes-moth. And these animalcules come in greater numbers if
the woollen substances are dusty; and they come in especially large
numbers if a spider be shut up in the cloth or wool, for the
creature drinks up any moisture that may be there, and dries up the
woollen substance. This grub is found also in men's clothes.
A creature is also found in wax long laid by, just as in wood,
and it is the smallest of animalcules and is white in colour, and is
designated the acari or mite.
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