CHAPTER 14.. Great Range Composed of Boulder Clay.--Daraily.--Lost on the

Great range composed of boulder clay.--Daraily.--Lost on the savannahs.--Jamaily.--A deer-hunter's family.--Totagalpa.--Walls covered with cement and whitewashed.--Ocotal.--The valley of Depilto.--Silver mine.--Geology of the valley.--Glacial drift.--The glacial period in Central America.--Evidence that the ice extended to the tropics.--Scarcity of gold in the valley gravels. --Difference of the Mollusca on the east and west coast of the Isthmus of Darien.--The refuge of the tropical American animals and plants during the glacial period.--The lowering of the sea-level. --The land shells of the West Indian Islands.--The Malay Archipelago.--Easter Island.--Atlantis.--Traditions of the deluge.