LIST OF ILLUSTRATIONS XI 



FIGURE PAGE 



75. Sea Lily . , . 74 



76. A Planarian Worm 77 



77. Trichinella 78 



78. A Common Tapeworm ........ 78 



79. Hair Worm in the Body of a Grasshopper .... 79 



80. Diagram of the Organs of Earthworm from the Side . . 81 



81. Earthworm . 82 



82. Dero 84 



83. Crayfish Bearing Eggs ........ 86 



84. Crayfish . ' . 87 



85. Molted Exoskeleton of Lobster 87 



86. Organs of Crayfish 89 



87. Soft-Shell Crab 91 



88. Pill Bug . 91 



89. Cyclops . . .... ... 91 



90. Daddy-Long-Legs ..... ... 92 



91. Spider 92 



92. Thousand-legged Worm ; Centipede ..... 92 



93. Clam ; Showing Foot 94 



94. Right Shell of Clam 95 



95. Digestive Tube of Clam 95 



96. Embryo of Clam 97 



97. Snail 98 



98. Tongue of Snail 98 



99. Snail Shells 99 



100. An Octopus 99 



101. Soft-Shell Clam 100 



102. Stages in Life History of Oyster 101 



103. Barnacles and Clams Growing on Oysters . . . .101 



104. Skeleton of Fish . 103 



105. Perch 104 



106. Sunfish, or Pumpkin Seed .104 



107. Catfish, Bullhead, or Horned Pout . . . . . .105 



108. Brook Trout 106 



109. Scales of Fishes . . . . ■ 107 



110. Eggs of Land-Locked Salmon 110 



111. Young Fish ; Showing Yolk Sac .111 



112. Young Fish Fry Ill 



113. Some Common Salamanders 113 



114. Common Frog 114 



115. Diagram to Show Organs of Frog 116 



116. Kidneys of the Frog .... . .117 



