CONTENTSCHAPTERPAGEI.[How the Globe Was Stocked with Life]9II.[The Sea a Vast Aquarium]16III.[A Chapter of Foundations]25IV.[The Humblest of Animals—Sponges]30V.[Flowers of the Sea]33VI.[Uninvited Guests]44VII.[Dwellers Between Tide Marks]46VIII.[Builders of the Pearly Shells]57IX.[Builders of the Pearly Shells—Continued]64X.[Animals with Jointed Frames]81XI.[From Butterflies to Beetles and Bees]99XII.[At the Doorway of the "Upper Classes"]127XIII.[Fishes—The Aristocracy of the Waters]132XIV.[Sharks—The Tigers of the Sea]142XV.[The Fearful Devilfish and Other Rays]148XVI.[Bony Fishes—Teleostomi]151XVII.[Modern Fishes—Teleostei]154XVIII.[Amphibians—A Connecting Link]167XIX.[Amphibians—Continued]174XX.[Reptiles—Monarchs of the Mesozoic World]182XXI.[Serpents, Good and Bad]211XXII.[Birds—Kings of the Air]239XXIII.[Some Notable Water Birds]250XXIV.[Vultures, Falcons, and Game Birds]260XXV.[From Gulls to Kingfishers]264XXVI.[Passerine Birds]268XXVII.[The Beasts of the Field—Some Primitive Types]270XXVIII.[The Gnawers]285XXIX.[Mammals of the Sea]297XXX.[The World's Herds and Flocks]300XXXI.[The World's Herds and Flocks—Continued]313XXXII.[Some Supremely Useful Animals]324XXXIII.[Beasts of Prey—The Carnivora]332XXXIV.[Beasts of Prey—Continued]354XXXV.[Insectivora—Hedgehogs, Moles, and Shrews]366XXXVI.[The Bats—Wing-Handed Mammals]369XXXVII.[Man's Humble Cousins]373LIST OF ILLUSTRATIONS[Giraffes, in Their Native African Haunts]FrontispieceFACING PAGE[Starfish and Other Typical Life in a Tide Pool]48[Coral Formations of the Great Barrier Reef, Australia]49[Caterpillar Beginning to Weave Its Cocoon]118[Moth and Eggs]119[Caterpillar Protected by Form and Color Resembling the Twigs of a Tree]148[Sea Horse Protected by Form and Color Resembling the Marine Plants Among Which It Lives]148[Gila Monster, Feared, Though Its Bite Is Not Always Deadly to Man]149[Iguana, a Remarkable Lizard of the New World]149[Pelican, Notable for Its Throat Pouch]248[Peacock with Brilliant Tail Spread]249[Sacred Pheasant]249[Opossum Mother and Young]272[Anteater, Which Lives on Insects Caught in the Sticky Saliva on Its Long Tongue]273[Sloth, an Animal Which Keeps to Trees and Is Almost Helpless on the Ground]273[Wart Hog, One of the Ugliest Animals to See]304[Malay Tapir, Related to the Pig and the Rhinoceros]304[Markhor, an Asiatic Wild Goat]305[Mountain Sheep or Bighorn of the Rocky Mountains]305[The Kudu, or Striped Antelope, of Africa]312[Head of the Greater Sable Antelope]312[Head of Alaskan Moose]312[Axis, or Spotted Deer of the East Indies]313[American Deer with Horns in Velvet]313[Wolves, in Western North America]336[Bear in a Rocky Mountain Forest]337[Bat, with Young Bat in Each Pouch]352[Black Spider Monkey]353[Ruffed Lemur, Attractive by Its Coloring]353[Mandrill, Mouth Open to Snarl]368[Gorilla, Somewhat Thoughtful]368[Chimpanzees, Imitating Some of the Ways of Man]369