INDEX 



Page. 



Acrocomia palms : 12 



Agriculture, effects on forms of erosion 18-19 



possibilities as indicated by plants 12-13 



prehistoric, shown by terracing of land 17-18 



primitive 8-11,23 



Alders on Vulcan de Agua ' 20 



Alta Vera Paz, ruins 16 



Animals, draft, lacking in Central America 9 



Antiquity of agriculture, evidence 17-18 



ruins 14 



Arachnids in humus 13-14 



Archaeology, remains, evidence of previous occupations 16-17 



Arthropods, humus-inhabiting, absence indication of previous denudation_ 13-15 



Attalea palms 12-13 



Beans, broad, crop grown by Indians 1 8 



Brazil, climatic phenomenon reported by Darwin 16 



Cacti at different elevations 7 



Cahabon region, description, etc 15-16 



Castilla trees 12 



Caves with pottery 17 



Cecropia trees 12 



Centipeds in humus • 13-14 



Chamaedorea palms 13 



Civilization limited by agriculture 23 



primitive 9-18 



Civilizations, ancient, limits 23 



Climate, changes, relation to denudation 15-16 



Clouds absorbed over denuded areas 16 



Coban region, description, etc 9-10 



Cobulco. region, description 10 



Cocoanut palms, indication of dry season ^ 15 



Coffee plantations 16 



Colombia, corn culture 10 



Comitan region, terraces 7 18 



Copan, ruins 13 



Corn culture 8-11. 21 



hills J 10 



Cortez, journey to Honduras 13 



Costa Rica, burning of savannas 11 



change of rainfall 15 



oaks 19 



relics of ancient civilizations 16 



Cotton culture 9 



Curatella trees 12 



145 



27 



