viii CONTENTS. 



CHAPTER PAGE 



XIV. Net-veined Insects with an incomplete Metamorphosis. 99 



XV. The Bugs, or Sucking Insects 100 



XVI. The Net-veined Insects with a complete Metamorphosis. 104 



XVII. The Beetles, or Sheath-winged Insects 105 



XVIII. The House-fly and other Two-winged Insects 109 



XIX. The Butterfly and other Scaly-winged Insects 116 



XX. The Bee and other Membrane-winged Insects. 124 



XXI. Animals with a Backbone 129 



XXII. The Skullcss Vertebrates 139 



XXIII. The Purse gilled Vertebrates 143 



XXIV. The Sharks 145 



XXV. The Mailed Fishes 149 



XXVI. The Bony Fishes 153 



XXVII. TheLungfish 167 



XXVIII. The Salamander, Frog, and other Amphibians 169 



XXIX. The Lizards, Snakes, and other Reptiles 183 



XXX. The Birds i96 



XXXI. The Cat as a Type of the Mammals 217 



XXXII. The Reptilian Mammals 231 



XXXIII. The Marsupials or Pouched Mammals 234 



XXXIV. The Docile Mammals 237 



