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.