Panuncillo, mines of.
Parana, Rio, on saline incrustations. —Pampean formations near. —on the S. Tandil.
Parish, Sir W., on elevated shells near Buenos Ayres. —on earthquakes in the Pampas. —on fresh-water near salt lakes. —on origin of Pampean formation.
Patagonia, elevation and plains of. —denudation of. —gravel-formation of. —sea-cliffs of. —subsidence during tertiary period. —crystalline rocks of.
Payta, tertiary formations of.
Pebbles of pumice. —decrease in size on the coast of Patagonia. —means of transportation. —encrusted with living corallines. —distribution of, at the eastern foot of Cordillera. —dispersal of, in the Pampas. —zoned with colour.
Pentland, Mr., on heights in the Cordillera. —on fossils of the Cordillera.
Pernambuco.
Peru, tertiary formations of.
Peuquenes, Pass of, in the Cordillera. —ridge of.