552 



INDEX 



Locust-borers, 305 

 Locusts, 298 

 Longipennes, 415 

 Lophobranchii, 376 

 Lophophore, 203 

 Lumbar vertebrse, 328 

 Lumbricus, 223 

 Lung-fishes, 374 

 Lungs, 70, 336 

 Lymph, 59 

 Lymphatics, 446 



Macromere, 234, 255 



Madreporic body, 215 



Malacostraca, 294 



Malaria, 1.63 



Mallophaga, 300 



Malpighian tubule, 282 



Mammals, 144 



Mammary glands, 442 



Mammoth, 455 



Man, 460, eh. XXV 



Man, 466; differences from animals, 

 466-470; mental life, 470; social 

 instincts, 472; education of, 473; 

 relation to nature, 474; age on earth, 

 475; types of, 475; future of, 476 



Manatee, 453 



Mandible, 264, 274 



Mantle, 248 



Marsupials, 441, 440, 451 



Marsupium, 440, 449 



Marten, 455 



Mastodon, 455 



Maturation (of ovum), 32, 33, 34 



Maxilla, 268, 274 



Maxillary palpus, 274 



Maxillipeds, 268 



May-flies, 299 



Meantes, 484 



Medical uses of animals, 511 



Medulla oblongata, 349, 351 



Medullary sheath (nerve), 61, 62 



Medusa-type, 179 



Megalops, 289 



Mendel's experiments, 497 



Mendel's laws, 499 



Mental life of man, 470 



Mesenchyma (mesogloea), 167 



Mesenteron, 68, 332 



Mesentery, 321 



Mesoblast (see mesoderm), 234 



Mesoderm, 40, 41 



Mesothorax, 273 



Mesozoa, 204 



Metabolism, 67 



Metamere, 97 



Metamorphosis — worms, 196, 197; 

 echinoderms, 219; arthropods, 288 

 amphibia; 380, 381 



Metaphase, 24 



Metapleure, 314 



Metathorax, 273 



Metazoa, 149-486 



Metridium, 176 



Mice, 458 



Micromeres, 234, 255 



Micropyle, 36 



Microstomum, 19s 



Migration, 107, 136; of birds, 433 



Millipedes, 297 



Mimicry, 130, 391 



Mimus, 428 



Mink, 455 



Mites, 310 



Mitotic cell-division, 24, 25 



Mniotiltidse, 431 



Mocking bird, 428 



Modern birds, 411 



Molar teeth, 444 



Moles, 452 



Mollusca, 240 



MoUuscoidea, 203 



Monkeys, 460 



Monodelphia, 451 



Monomya, 260 



Monotremata, 440, 450 



Morphology — defined, 3 



Morula, 38, 39 



Mosquitoes, 302, 303 



Moths, 303 



Motion, 76 (see locomotion); proto- 

 plasmic, 15 



Moulting, 280 



Mouth-parts (arthropods), 266, 274 



Mucous epithelium, 50 



Muscular system, 76; coelenterates, 183; 

 echinoderms, 217; annulates, 229; 

 moUusks, 248 ; arthropods, 281 ; verte- 

 brates, 346 



