so entangled by these shallows that we could hardly find
our way. Nothing was visible but the flat beds of mud; the
day was not very clear, and there was much refraction, or
as the sailors expressed it, "things loomed high." The only
object within our view which was not level was the horizon;
rushes looked like bushes unsupported in the air, and water
like mud-banks, and mud-banks like water.

We passed the night in Punta Alta, and I employed myself
in searching for fossil bones; this point being a perfect
catacomb for monsters of extinct races. The evening was
perfectly calm and clear; the extreme monotony of the view
gave it an interest even in the midst of mud-banks and gulls
sand-hillocks and solitary vultures. In riding back in the
morning we came across a very fresh track of a Puma, but
did not succeed in finding it. We saw also a couple of
Zorillos, or skunks, -- odious animals, which are far from
uncommon. In general appearance, the Zorillo resembles a
polecat, but it is rather larger, and much thicker in proportion.
Conscious of its power, it roams by day about the open
plain, and fears neither dog nor man. If a dog is urged to
the attack, its courage is instantly checked by a few drops
of the fetid oil, which brings on violent sickness and running
at the nose. Whatever is once polluted by it, is for
ever useless. Azara says the smell can be perceived at a
league distant; more than once, when entering the harbour
of Monte Video, the wind being off shore, we have perceived
the odour on board the Beagle. Certain it is, that
every animal most willingly makes room for the Zorillo.