Maclaren, Mr., letter to, on coral-formations.
Macrauchenia Patachonica.
Madeira, subsidence of.
Magellan, Strait, elevation near, of.
Magnesia, sulphate of, in veins.
Malcolmson, Dr., on trees carried out to sea.
Maldonado, elevation of. --Pampean formation of. --crystalline rocks of.
Mammalia, fossil, of Bahia Blanca. -- --near St. Fe. -- --of Banda Oriental. -- --of St. Julian. -- --at Port Gallegos. --washed down by floods. --number of remains of, and range of, in Pampas.
Man, skeletons of (Brazil). --remains of, near Lima. --Indian, antiquity of.
Marble, beds of.
Maricongo, ravine of.
Marsden, on elevation of Sumatra.
Mastodon Andium, remains of. --range of.
Maypu, Rio, mouth of, with upraised shells. --gravel fringes of. --debouchement from the Cordillera.
Megalonyx, range of.
Megatherium, range of.
Miers, Mr., on elevated shells. --on the height of the Uspallata plain.
Minas, Las.
Mocha Island, elevation of. --tertiary form of. --subsidence at.
Molina, on a great flood.
Monte Hermoso, elevation of. --fossils of.
Monte Video, elevation of. --Pampean formation of. --crystalline rocks of.
Morris and Sharpe, Messrs., on the palaeozoic fossils of the Falklands.
Mud, Pampean. --long deposited on the same area.
Murchison, Sir R., on cleavage. --on waves transporting gravel. --on origin of salt formations. --on the relations of metalliferous veins and intrusive rocks. --on the absence of granite in the Ural.
Nautilus d'Orbignyanus.
Navidad, tertiary formations of, subsidence of.
Negro, Rio, pumice of pebbles of. --gravel of. --salt lakes of. --tertiary strata of.
North America, fossil remains of.
North Wales, sloping terraces absent in. --bent cleavage of.
Neuvo Gulf, plains of. --tertiary formation of.
Owen, Professor, on fossil mammiferous remains.
Palmer, Mr., on transportation of gravel.
Pampas, elevation of. --earthquakes of. --formation of. --localities in which fossil mammifers have been found.
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.
Pholas, elevated shells of.
Pitchstone of Chiloe. --of Port Desire. --near Cauquenes. --layers of, in the Uspallata range. --of Los Hornos. --of Coquimbo.
Plains of Patagonia. --of Chiloe. --of Chile. --of Uspallata. --on eastern foot of Cordillera. --of Iquique.
Plata, La, elevation of. --tertiary formation of. --crystalline rocks of.
Playfair, Professor, on the transportation of gravel.
Pluclaro, axis of.
Pondicherry, fossils of.
Porcelain rocks of Port Desire. --of the Uspallata range.
Porphyry, pebbles of, strewed over Patagonia.
Porphyry, claystone, of Chiloe, -- --of Patagonia. -- --of Chile. --greenstone, of Chile. --doubly columnar. --claystone, rare, on the eastern side of the Portillo Pass. --brick-red and orthitic, of Cumbre Pass. --intrusive, repeatedly injected. --claystone of the Uspallata range. -- --of Copiapo. -- --eruptive sources of.
Port Desire, elevation and plains of. --tertiary formation of. --porphyries of.
Portillo Pass in the Cordillera.
Portillo chain. --compared with that of the Uspallata.
Prefil or sea-wall of Valparaiso.