INDEX 



659 



Market gardening, 574 

 Marmoset, 508, 545 

 Marsupials, 115 

 Mast, S. O., 154, 155 

 Mastax, rotifers, 153 

 Mastigophora, 77 

 Matthews, 565 

 Matthews' Law, 565 

 Maturation, 428, 456 

 Maxilla 



bee, 203, 205 

 locust, 201 

 Mayas, 562 

 Mayflies, 100 

 Mavo, John, 311 

 Mead, A. D., 413, 529 

 Mechanisms of response 

 animals, 374-376 

 plants, 370-374 

 Mechanisms of sensation and co-ordi- 

 nation, 340 

 Mecoptera, 102 

 Medulla, adrenal, 392 

 Medulla oblongata, 310, 318, 346, 351, 



353 

 Mediterranean fruit-fly, 585 

 Mediterranean races, 561 

 Medullary sheath, 341 

 Medusae, Obelia, 186 

 Meiosis, 459 

 Melanesians, 562 

 Membrane 

 plasma, 134 



selectively permeal)le, 134 

 Mendel, 278, 442, 443-452, 459, 523, 640 

 Mendelism, 443, 515, 640 

 Mendel's laws, 455, 467 

 Mental age, 388 

 Meridion, 71 

 Meristem, 243 

 Merozoite, 227 

 Mesencephalon, S46, 350 

 Mesenchyme cells, 419 

 Mesoderm formation, 419 



in earthworm, 197 

 Mesodermal derivatives, 422 

 Mesohippus, 511 

 Mesomeral, 425 

 Mesophyfl, 252 

 Mesophytes, 6, 7 

 Mesozoic era, 476, 513, 533, 553 

 Metabolic gradients, 381, 431 

 Metabolism, definition of, 126 

 Metacarpal bones, 332 

 Metagenesis, 414 

 Metameres, earthworm, 187 

 Metamerism 

 earthworm, 187 

 insect, 200 



Metamorphosis, 235 



honey bee, 212-213 

 Mctaphase, 142, 143 

 Metatarsal bones, 332 

 Metatarsus, bee, 207, 208 

 Metatela, 351 

 Metathcria, 115 

 Metazoa, 139 

 Metencephalon, 3^6, 350 

 Method 



experimental, 441 

 germplasmal, 441, 455 

 observational, 440 

 statistical, 440 

 Metridium, 81 

 Mexican axolotl, 414 

 Mice, 487 



Micro-conjugant, 412 

 Micronucleus, Paramecium, 160 161, 



162 

 Microsphaera, 73 

 Microstomum, 41 1 

 Micrura, 85 

 Mid-brain, 346. 350 

 Middle ear, 329, 362 

 Middle piece, sperm, Jft5, 416 

 Mildews, 228 

 Milhpedes, 99, 103 

 Milton, John, 493 

 Minkowski, 397 

 Miocene period, 476, 511, 513 

 Mirabilis jalapa, 446 

 Miracidium, 219 

 Mistletoe, 217, 223 

 Mites, 102 

 Mitochondria, 416 

 Mitosis, 141-144, 415, 456, 459 

 animal, US 

 plant, 141 

 Mixed nerves, 353 

 Moas, 113 



Modified ratios, 450-452 

 Molars, 286 

 Molds, 71 



bread, 173-/74 

 fossil, 478 



reproduction in, 174 

 Moles, 115, 534 

 Molluscoidea, 91, 103 

 Mollusca, 97, 103 

 Molluscs, 235, 499, 513 

 Molting, 234 

 Mongolians, 562 

 Monkeys, 233, 487, 507, 514, 535, 



536, .537, 546 

 Monocotyledonous stem, ^.^5-251, 250 

 Monocotyledons, 64, 75, 77, 240 

 Monohybrids, 447 

 Monotremes, 115, 423 



