Index 713 



Mesoderm, 282, 288-289, 402 

 Mesoglea, 376, 384 

 Mesohippus, 333 

 Mesomere, 288 

 Mesonephros, 185, 186 

 Mesothorax, 522 

 Mesovarium, 260 

 Mesozoa, 346, 375, 382-383 

 Mesozoic era, 342, 568, 569, 604, 613, 



627 

 Metabolic processes, 186 



rate 149 

 Metabolism, 24, 127, 225, 228 



basal, 157 



of calcium and phosphorus, 231-232 



of carbohydrates, 235, 238, 247 



of fat, 238, 247 



of proteins, 235 

 Metacarpals, 56, 58, 101, 109 

 Metacercaria, 411, 414 

 Metacrinus, 553 

 Metagenesis, 385 

 Metamerism, 346, 447 

 Metamorphosis, 134, 231, 249, 520, 



521, 597 

 Metanephridial system, 448, 468 

 Metanephros, 185, 186, 603 

 Metaphase, 271 

 Metapleural fold, 564 

 Metatarsals, 56, 58, 101, 110 

 Metatarsus, 512 

 Metatheria, 627, 630 

 Metathorax, 522 

 Metazoa, 44, 114, 147, 346, 375 



origin of, 644-645 

 Metencephalon, 196, 199-201 

 Metridium, 396 

 Miastor, 254 

 Mice, 81, 649 



lethal characters in, 312 

 Microcyprini, 590 

 Microfilaria, 436, 437 

 Microgamete, 356, 363, 364 

 Micronucleus, 369, 370, 372 

 Micropodiformes, 625 

 Micropterus, 590 

 Micropyle, 520, 527 

 Microscope, 265, 266, 267 

 Microsorex, 634 

 Microtus, 636 

 Micrurus, 609 

 Micturition, 191 

 Midbrain {see mesencephalon), 60, 



196, 199 

 Middle piece of sperm, 258, 275 

 Midgut. 497, 519, 523 

 Midwife toad {see Alytes), 596, 599 

 Migration, 77, 337 



bird, 77, 621-623, 650 



fish, 587 

 routes, 337 



Milk, 81, 138 



pigeon, 132, 621 

 teeth, 88 

 Millipede, 489, 515, 516 

 Milt, 586 

 Mimicry, 236-237 

 Mineral reserves, 93 

 Mink, 630, 638 

 Miocene epoch, 333, 342 

 Miohippus, 2i2i2) 

 Miracidium, 410, 413 

 Mistichthys, 581 

 Mite. 489, 514, 515, 516 

 Mitochondria, 268 

 Mitosis, 270-272 

 Mitral valve {see bicuspid valve), 



162, 163, 164 

 Mixed nerve, 203 

 Moa, 625 



Mola, 581, 589, 590 

 Molar, 87, 88, 130 

 Mole, 82, 111, 112, 633 

 Mole cricket, 530, 538 

 Molecule, 27 

 Molgula, 561, 562-564 

 Mollusca, 45, 92, 148, 209, 348, 357, 

 466-485 



characteristics of, 466-468 



classes of, 468 

 Molt, 90, 91, 94. 249, 487-488 

 Monkey, 83, 85, 130, 134, 181 

 Monocyte, 177, 178 

 Monodon, 630 

 Monoecious, 253, 459 

 Monogenea, 409 

 Monogenetic trematodes, 409 

 Monohybrid cross, 298-301 

 Monosaccharide, 31 

 Monotremata, 629, 630-631 

 Mons pubis. 261 

 Montipora. 397 

 Morgan, T. H., 302 

 Morphology, 21 

 Morula, 280 

 Mosquito, 540 



as vector, 365, 367, 436, 518, 535, 536 



habits and control. 367 

 Moss animals {see Entoprocta or Bry- 



ozoa) 

 Moth, 540 

 Motor areas of brain, 198, 200 



axon, 209 



nerve, 203 



neuron, 203 



plate, 194, 195 

 Mouse, 174, 241 

 Mouse bird, 625 

 Mouth, 52, 53-54, 120, 128, 130-131 



