INDEX 
Inttorina, habits of, 83. 
Liver-fluke, 49. 
Lizard (illus.), 185. 
Lobster, 102. 
Locust (illus.), 117. 
Long-horned borer beetle (illus.), 
124, 
Longipennes, 211. 
Loon, 209. 
Lophius piscatorius (illus.), 169. 
Lophortyx californicus (illus.), 217. 
Lumbricus terrestris (illus.), 55. 
Lung-fish, 160. 
Lynx (illus.), 241. 
Macrobdelia (illus), 63. 
Macrocheira, 222. 
Mammals, characteristics of, 225; 
anatomy, 226; classification, 228. 
Man, 245. 
Many-celled animals, 11. 
Marsupialia, 231. 
Marsupium (marsupium, a purse 
or bag), 2382. 
May-fly, 118. 
Megaptera versabilis (illus.), 235. 
Mesenteric filaments, 40. 
Messmates, defined, 48. 
Metamorphosis, retrograde, 99 ; in- 
complete, 126; complete, 128. 
Metazoa, defined, 11. 
Mice, 233. 
Millipeds (illus.), 111. 
Minnow, 163. 
Mite (illus.), 188. 
Mole, 234. 
Mollusks, general characters of, 72. 
Molt, of crustacea, 99, 110; of 
birds, 202. 
Monarch butterfly (illus.), 125. 
Monkeys, 248. 
Morphology, defined, 1. 
255 
Mosquito, 122; development of, 
123. 
Moths (illus.), 125. 
Mud-hen, 215. 
Mud-puppy (illus.), 178. 
Multiplication of animals, 5. 
Muscle-cell (illus.), 7. 
Muscular system, use of, 4. 
Mussel, 77, 
Mysis americana (illus.), 100. 
Mytilus edulis (illus.), 77. 
Nauplius (illus.), 99. 
Nematoda (illus.), 52. 
Nemertean worm (illus.), 70. 
Nerets (illus.), 59.’ 
Nerve-cell (illus.), 7. 
Nettle-cell (illus.), 30. 
Neuroptera, 118. 
Newt (illus.), 178. 
Night-hawk (illus.), 222. 
Notochord, 151. 
Nucleus (illus.), 9. 
Octopus punctatus (illus.), 87. 
Oligochetes, 59. 
Operculum (operculum, a lid), 87. 
Opossum (illus.), 231. 
Opossum-shrimp (illus.), 100. 
Orang-utan (illus.), 243. 
Orb-weaving spider, 136. 
Ornithorhynchus paradoxus (illus- 
tration), 280. 
Orthoptera, 117. 
Ostrich (illus.), 209. 
Oyster, 77. 
Owls, 219. 
Pagurus bernhardus (illus.), 108. 
Paludicole, 215. 
Pandorina (illus.), 19. 
Panther (illus.), 241. 
