Numerous gigantic extinct Quadrupeds.
Recent Extinction.
Longevity of Species.
Large Animals do not require a luxuriant Vegetation.
Southern Africa.
Siberian Fossils.
Two Species of Ostrich.
Habits of Oven-bird.
Armadilloes.
Venomous Snake, Toad, Lizard.
Hybernation of Animals.
Habits of Sea-Pen.
Indian Wars and Massacres.
Arrowhead, antiquarian Relic.
BAHIA BLANCA.
The "Beagle" arrived here on the 24th of August, and a week
afterwards sailed for the Plata. With Captain Fitz Roy's consent I
was left behind, to travel by land to Buenos Ayres. I will here add
some observations, which were made during this visit and on a
previous occasion, when the "Beagle" was employed in surveying the
harbour.
The plain, at the distance of a few miles from the coast, belongs
to the great Pampean formation, which consists in part of a reddish
clay, and in part of a highly calcareous marly rock. Nearer the
coast there are some plains formed from the wreck of the upper
plain, and from mud, gravel, and sand thrown up by the sea during
the slow elevation of the land, of which elevation we have evidence
in upraised beds of recent shells, and in rounded pebbles of pumice
scattered over the country.
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