XIV 



LIST OF ILLUSTRATIONS. 



FIG. PAGB 



74. Flying Dragon *54 



75. Skeleton of Bird's Wing . . . iSS 



76. Bird . . . -156 



77. Leg and Ankle of Bird . . . 57 



7 \ Fossil Footprints from Triassic Rocks 157 



79- ' 



80. Fossil Remains of Archxopteryx . 158 



8t. Hesperornis Jaw .... 160 



82. Ichthyornis Jaw 160 



83. Odontopteryx (restored) . . .161 



84. Restoration of Compsognathus . . 162 



85. Hindlimbs of Bird, Extinct Reptile, 



and Crocodile 163 



86. Skeleton of Pterodactyl . . .164 



87. Development of a Sponge (Olynthus) 173 



88. Sea-squirt i?4 



89. Development of Sea-squirt . . 175 



90. Appendicularia 176 



91. Amphioxus, or Lancelet . . . 176 



92. Development of Lancelet . . . '77 



93. Vertebrate . .179 



94. Section through a developing Verte- 



brate i?9 



95. Development of Chick . . .180 



96. Embryo-chick 180 



97. Embryo-vertebrates .... 181 



98. Development of a Protozoon . .184 

 go,. Bear-animalcule . 185 



100. Segmentation of Vertebrate Egg . 185 



101. Frog's Egg . . 186 



102. Gastrulas of various Animals . . 186 



103. Development of a Fish . . . 187 



104. Embryos of Quadrupeds . . . 188 



105. Tadpoles of Frog . . . .189 



1 06. Sea-urchins 195 



107. Starfishes 195 



108. Sea-cucumbers 196 



109. Crinoid 197 



no. Larvae of Starfish .... 197 



in. Development of Sea-urchin . . 198 



112. Rosy Feather-star and Young . . 198 



113. Development of Crinoid . . . 199 



114. Sea-cucumber . . 200 



115. Crab 201 



116. Water-fleas 202 



117. Barnacles 203 



118. Sacculina 204 



1 19. Young of Barnacle .... 205 



120. Development of Barnacles, &c. . . 205 



121. Nauplius of Sacculina . . . 206 



122. Cyclops .... 207 



123. Fish-louse and its Nauplius . . 208 



124. King Crab . .... 209 



FIG. PAGE 

 125. Trilobites 210 



Iz6- 1 Larvae of King Crab and Trilobite . 210 



127. ) 



128. Brine Shrimp and Young . . .211 



129. Development of Lobster . . .211 



130. Crab . . .212 



131. Mysis 213 



132. Penaeus 2I 4 



133. Nauplius of Penaeus .... 215 



134. Zoea of Penaeus 215 



135. Mysis-stage of Penaeus . . . 216 



136. Mussel 22 



137. Snail 221 



1 3 8. Slugs 221 



139. Chitons 222 



140. Pteropoda 222 



141. Cuttlefishes 223 



142. Development of Cockle and Ship- 



worm 223 



143. Teredo, or Ship-worm . . . 224 



144. Dentalium and its Structure . . 224 



145. Development of Dentalium . . 225 



146. Chiton (Loven) . 226 



147. Pond Snail, Gastrula-stage . . 226 



148. Development of Trochus . . . 227 



149. Doris 228 



150. JEolis 228 



151. Bulla 228 



152. Young of ./Eolis and Adult Pteropod 228 



153. Larval, or Young Pteropod . . 229 



154. Brachiopoda and Development . . 229 



155. Lob-worm (A renicola) . . .231 



156. Nereis : a Marine Worm . . . 231 



157. Development of Worms . . . 231 



158. Serpula 232 



159. Development of Frog . . . 235 



160. Axolotl, showing the External Gills . 236 



161. Newts 238 



162. Hippocampus, or Sea-horse . . 239 



163. Amblystoma 242 



164. Cecidomyia 246 



165. Sitaris and its Development . . 247 



166. Humming-bird 249 



167. Swifts 250 



168. Sun-bird 250 



169. Young Kangaroo .... 254 



170. The Rosy Feather-star's Develop- 



ment 256 



171. Chloeon ...... 257 



172. Metamorphosis or Swallow-tailed 



Butterfly 258 



173. Cockroaches 259 



174. Dragon-fly and its Metamorphosis . 261 



