CHAP. 90.—WHICH FISHES HAVE THE FINEST SENSE OF SMELL.
It is quite manifest that fishes have the sense of smell also;
for they are not all to be taken with the same bait, and are seen
to smell at it before they seize it. Some, too, that are concealed in the bottom of holes, are driven out by the fisherman,
by the aid of the smell of salted fish; with this he rubs the
entrance of their retreat in the rock, immediately upon which
they take to flight from the spot, just as though they had recognized the dead carcases of those of their kind. Then, again,
they will rise to the surface at the smell of certain odours,
such, for instance as roasted sæpia and polypus; and hence it
is that these baits are placed in the osier kipes used for taking
fish. They immediately take to flight upon smelling the bilge
water in a ship's hold, and more especially upon scenting the
blood of fish.
The polypus cannot possibly be torn away from the rock to
which it clings; but upon the herb cunila1
being applied, the
instant it smells it the fish quits its hold. Purples also are
taken by means of fetid substances. And then, too, as to the
other kinds of animals, who is there that can feel any doubt?
Serpents are driven away by the smell of harts' horns, and
more particularly by that of storax. Ants, too, are killed by
the odours of origanum, lime, or sulphur. Gnats are attracted
by acids, but not by anything sweet.
(71.) All animals have the sense of touch, those even which
have no other sense; for even in the oyster, and, among land
animals, in the worm, this sense is found.