Proteus of the Carniola Caverns 79 The Axolotl and Amblystoma 80 The Flying Tree-Frog of New Guinea, _Rhacophorus Rheinhardti_ 86 The Tortoise 96 Carapace of the Tortoise 98 Back of a young Tortoise 99 Skeleton of a Lizard 103 Gecko and Chamæleon 105 The Nile Crocodile 108 Skeleton of a Snake 111 Common Ringed Snake 113 The Boa Constrictor 115 The Cobra di Capello 118 Jaw of a Rattlesnake 119 Common English Viper, _Pelias berus_ 121 The Sparrow 125 Skeleton of a Sparrow 126 The Adjutant Bird 128 The Ostrich at full Speed 137 The Giant Moa and Tiny Apteryx 140 A Group of Sea-Birds 144 Albatrosses and Penguins 147 A Group of Wading Birds 149 The Flamingo 150 Brush Turkeys and their Egg Mounds 158 Wood-pigeon on her Nest 160 The great green Woodpecker, _Gecinus viridis_ 163 The Kingfisher, _Alcedo ispida_ 166 Nest of the Common Wren, _Troglodytes parvulus_ 171 Nest of the Tailor-Bird 173 Eagle bringing Food to its Young 175 Jaw of Dromatherium, and Tooth of Microlestes 183 The Duck-billed Platypus and the Echidna 188 Head and Feet of Ornithorhynchus 189 Australian Marsupials 193 Tasmanian Marsupials 197 South American Marsupials and imperfect-toothed Animals 200 African imperfect-toothed Animals 202 Skulls of an Insect-Eater and a Rodent 217 A Group of Insect-Eaters 220