VOLCANIC DISTRICT 215 Crater Lake of Andraikìba—Crater Lake of Trìtrìva—Colour of Water—Remarkable Appearance of Lake—Legends about it—Its Depth—View from Crater Walls—Ankàratra Mountain—Lava Outflows—An Underground River—Extinct Lemuroid Animals —Graveyard of an Ancient Fauna—The Palæontology—And Geology of Madagascar—Volcanic Phenomena—The Madagascar Volcanic Belt—Earthquakes—A Glimpse of the Past Animal Life of the Island