LIST OF ILLUSTRATIONS XV 



FIGURE PAGE 



83. Electric ray ... 112 



84. Sword-fish n8 



85. Sturgeon HQ 



86. Metamorphosis of frog 124 



87. Mud-puppy, Necturus. 125 



88. Hellbender, Cryptobranchus 125 



89. Spotted salamander ... 126 



90. Tree frog ... 127 



91. Common bullfrog' 128 



92. Leopard frog , I2 9 



93. Spring frog -131 



94. American toad *3 2 



95. Green turtle ,- , *.. *3 8 



96. Carapace of diamond-back terrapin .14 



960. Pen of diamond-back terrapins 142 



97. Common snapping turtle 145 



98. Common soft-shelled turtle . 146 



99. Hawk's bill turtle . U9 



100. Common swift ... 151 



101. Iguana - i5 2 



102. Dissected head of rattlesnake 154 



103. Skull of a pit viper ... i55 



104. Cotton-mouth moccasin . . 158 



105. Copperhead 160 



106. Diamond rattler ... 161 



107. Common water snake 163 



108. Blacksnake ... 165 



109. Common bull snake 168 



no. Common king snake 169 



in. Skins of alligator 1 73 



112. Archaeopteryx , 179 



1 13. Kiwi 1 80 



1 14. African ostrich 181 



115. Plucking an ostrich r 183 



1 16. American egret 187 



117. California quail 188 



118. Hairy woodpecker 190 



119. Great horned owl 191 



120. Barn owl 192 



121. Cooper's hawk 193 



122. Four seed-destroying sparrows 196 



1 23. Bird house 199 



1 24. Bird house 199 



125. Bird house 199 



-126. Martin house 201 



