v i CONTENTS 



D. The Distribution of Land Animals 



CHAPTER PAGE 



XX. Ecological Factors of the Land and Their Effect 



on Animals 377 



XXI. Forest Communities of Animals 421 



XXII. The Animal Population of Dry, Open Lands 443 



XXIII. Animal Life of Swamps and of Shores 470 



XXIV. Alpine Animals 490 



XXV. The Animal Life of Polar Regions 505 



XXVI. Island Communities 515 



XXVII. Subterranean Animal Life 527 



XXVIII. The Effect of Man on the Distribution of Other 



Animals • 538 



Index 557 



