INDEX Acipenser sturio (illus.), 162. Acorn-barnacle (illus.), 97. Air-bladder, 155. Albatross, 212. Ant-lion (illus.), 120. Apes, 243. Arachnida, characteristics of, 133. Alligator mississippiensis (illus.), | Argynnis cybele (illus.), 126. 191. Alternation of generations, 35. Amaba (illus.), 12; structure and Amaba-like protozoa, 12. Amphibian, development of, 174; Ariolimax columbianus (illus.), 81. Arthropods, general features of, . Ascidian (illus.), 152. Amphibious (amphi, double; bios, Axolotl, 183. life), 176. Amphioxus (illus.), 157. Amphipod (illus.), 106. Back-swimmer, 121. Balancers, 122. Anatomy (anatemno, to cut up), Band-worm (illus.), 70. Barnacles (illus.), 96. Anguillula aceti (illus.), 53. ple and complex, 18. Bascanion constrictor (illus.), 187. Basket-star (illus.), 141. Bass, 166. Animals, characteristics of, 2; sim- Bat, brown, 234; red, 234. Animals and plants compared, 2. Anosia plexippus (illus.), 125. Antedon (illus.), 148. Birds, characteristics of, 201; anat- | Cheiroptera, 234. Brittle-star (illus.), 141; regenera- Clitellum, 58. Calcolynthus primigenius (illus.), Compound eyes, 109. Carapace, of crustacea, 95, 99; of Correlation of function and struc- turtle, 188. Carp, 163. Cat, domestic, 239; wild, 239. Cell (cella, a little room), 7; shape and size, 7; typical (illus.), 8. Centipeds (illus.), 111. Cercopithecus (illus.), 244. Cervus canadensis (illus.), 238. Cestode (illus.), 50. ture, 6. Cottontail, 233. Courting colors, 203. Crab, hermit (illus.), 102; cancer (illus.), 103; rock (illus.), 104; Crane (illus.), 215. Crinoid (illus.), 143. Crocodilia (illus.), 190. Crotalus adamanteus (illus.), 222. H Crustacea, 93; anatomy of, 98, 107; | Eretmochelys imbricata (illus.), Eagle, golden, 205; bald (illus.), | Ganoidea, 161. 205. 55; distribution, 59. Echinoderms, 141; locomotor sys- Eel, 163. Egg, fertilization of, 20, 21. Encystment of protozoa, 13. Gasteropod (illus.), 80; anatomy and Gastric mill (illus.), 107. Gastrula (diminutive of gaster, Geese, 213. Gelasimus (illus.), 104. Gephyrean worms (illus.), 67. Gila monster (illus.), 193. Haliætus leucocephalus (illus.), Julus (illus.), 112. Heptacarpus brevirostris (illus.), Lacertilia, 185, Long-horned borer beetle (illus.), Multiplication of animals, 5. Lizard (illus.), 185. Lobster, 102. Locust (illus.), 117. Marsupialia, 231. or bag), 232. Muscle-cell (illus.), 7. Mysis americana (illus.), 100. Nauplius (illus.), 99. Nettle-cell (illus.), 30. Neuroptera, 118. Newt (illus.), 178. Night-hawk (illus.), 222. Notochord, 151. Marsupium (marsupium, a purse Nucleus (illus.), 9. May-fly, 118. Megaptera versabilis (illus.), 235. Metamorphosis, retrograde, 99; in- complete, 126; complete, 128. Mice, 233. Millipeds (illus.), 111. Minnow, 163. Mite (illus.), 138. Mole, 234. Octopus punctatus (illus.), 87. Operculum (operculum, a lid), 87. Opossum-shrimp (illus.), 100. Orb-weaving spider, 136. Ornithorhynchus paradoxus (illus- tration). 230. Orthoptera, 117. Ostrich (illus.), 209. Mollusks, general characters of, 72. Molt, of crustacea, 99, 110; of Monarch butterfly (illus.), 125. Monkeys, 243. Morphology, defined, 1. Oyster, 77. Owls, 219. Pagurus bernhardus (illus.), 103. Paludicolæ, 215. Pandorina (illus.), 19. Panther (illus.), 241. |