864 



INDEX 



Marine fisheries, 826 



Mariuota, 842 



Marsupial frog, 452 



Marsupials, 491. 734, 842 



Marsupium, 492 



Mass spectrometer, 21 



Mastigophora. 832 



Mastodons, 500 



Maternal instinct, 626 



Mating behavior, 124 



Mating types, 116, 162 



Matrix, 55 



Matter, cyclic use of, 755 



Maxillae, 291, 296 



Maxillipeds, 295 



McC.lung, C. E., 650 



Mechanistic theory of life, 13 



Mechanoreceptors, 107, 108, 575 



Meckel's cartilage, 397 



Mecoptera, 837 



Median eminence, 620 



Medical genetics, 693 



Medulla oblongata, 416, 562, 597, 599 



Medusa, 181 



Megaceiyle, 841 



Mega n t h rop us, 747 



Meiosis, 1 1 6 



Melanin, 506 



Melanophores, 396 



Meleagrina, 256 



Membrane potential, 104 



Membranelles, 164 



Membranous labyrinth, 581 



Mendel, Gregor Johann, 650 



Mendel's Laws, 650 



Meninges, 417, 599 



Menstrual cycle, 631 



Mesencephalon, 416, 597 



Mesenchyme, 208 



Mesenteries, 238, 403, 522 



Mesichthyes, 839 



Mesoderm, 129, 640 



differentation of, 643 

 Mesoglea, 181 

 Mesonephros, 561, 732 

 Mesosoma, 320 

 Mesothorax, 308 

 Mesozoa, 352, 832 

 Mesozoic era, 723 

 Metabolic tracers, 20 

 Metabohsm, 15, 64 



carbohydrate, 526 



fat, 526 



protein, 526 



special types of, 75 

 Metacarpals, 401, 512 

 Metacercaria, 216 

 Metameres, 267 

 Metamerism, 267 

 Metamorphosis, 330, 380, 422, 611 



Metamorphosis of insects, 316 



of tornaria, 379 

 Metancphridia, 239, 277 

 Metanephros, 561, 732 

 Metaphase, 42 

 Metapleural folds, 387 

 Metasoma, 320 

 Metatarsals, 401, 512 

 Metatheria, 491, 842 

 Metathorax, 308 

 Metazoa, 148 



phylogeny of, 242 

 Metencephalon, 416, 597 

 Method of agreement, 5 

 Method of concomitant variation, 6 

 Method of difference, 5 

 Metridium, 195 

 Michaelis, Leonor, 69 

 Micromeres, 241 

 Micronucleus, 160 

 Micropodiformes, 841 

 Micropterus, 839 

 Microsauria, 840 

 Microsomes, 17, 38, 69 

 Middle ear cavity, 518 

 Middle Paleolithic culture, 751 

 Middle piece, 1 1 9 

 Midgets, 624 

 Migration, 483 



bird, 483 

 Milleporina, 833 

 Millipede, 305 

 Mimicry, 785 

 Mineral cycles, 758 

 Mineralocorticoids, 618 

 Minerals, 83 

 Miocene epoch, 725 

 Miracidium, 214 

 Mississippian period, 723 

 Mitochondria, 17, 38, 69 

 Mitosis, 39 



regulation of, 43 

 Mixture, 22 

 Mneiuiopsis, 200, 832 

 Modifications, 700 

 Modifying factors, 677 

 Molars, 487, 516 

 Molds, 717 

 Molecular motion, 48 

 Molecule, 21 

 Moles, 492 

 Molgula, 383, 384 

 Molluscs, 244-258, 834 



classes of, 246 



general features of, 244 

 Molt and metamorphosis hormone, 330 

 Molting, 96, 231, 326, 471 

 Molting fluid, 326 

 Monaxonida, 832 

 Mongoloids, 750 



