INDEX 



865 



Monkeys, 496 

 Monocytes, 59, 542 

 Monod, Jacques, 134 

 Monogenea, 213, 833 

 Monohybrid cross, 654 

 Monotremes, 491, 734, 842 

 Monsters, 212 

 Moore, Carl R., 568 

 Moray eels, 442 

 Morgan, T. H., 650 

 Morphogenesis, 134 

 Morphogenetic substances, 120 

 Mortality rate, 771 

 Morula, 637 

 Mosaic vision. 336 

 Motion, 98 



ameboid, 98 

 Motor neuron, 418 

 Motor unit, 101 

 Mount Carmel fossils, 748 

 Mouth, 515 

 Movement, 15 

 Mucosa, 405, 521 

 Mucous glands, 396, 506 

 Mudpuppy, 450 

 Mudskipper, 442 

 Miiller, Johannes, 10 

 Multiple alleles, 677 

 Multiple factors, 674 

 Multiple fission, 165 

 Muscle, belly of, 101 



cardiac, 57 



insertion of. 101 



origin of, 101 



skeletal, 57 



smooth, 57 

 Muscles, 99 



bird, 474 



dogfish, 513 



fishes, 512 



groups of, 512 



man, 513 



vertebrate, 512 

 Muscular contraction, mechanism of, 



101 

 Muscular coordination, 419 

 Muscular system of frog, 401 

 Muscularis mucosae, 405 

 Musculocutaneous vein, 410 

 Muskrats, 500 

 Mussel, 256, 257 

 Mutagenic agents, 706 

 Mutants, biochemical, 687 

 Mutations, 685, 700, 704 

 Mutualism, 765 

 Alya arena) ia. 256 

 Myelencephalon, 416, 597 

 Myelin sheath, 27, 61 

 Myodocopa, 836 

 Myofibrils, 57 



Myogenic rhythms, 335 

 Myomere, 387, 512 

 Myosin, 44 

 Myotis, 842 

 Myotomes, 420, 644 

 Myriapoda, 305, 836 

 Mysidacea, 304, 836 

 Mystacocarida, 836 

 Mysticeti, 842 

 Myxedema, 610 

 Myzostomida, 835 



N 



Nails, 506 



Nares, 531 



Nasal cavities, 531 



Natural selection, 698, 702, 732 



theory of, 699 

 Nature-philosophy, 145 

 Nauplius eye, 302 

 Nauplius larva, 292 

 Nautiloidea, 834 

 Navel, 573 

 Navigation, bird. 485 



insect, 343 

 Neanderthal man, 747 

 Nearctic realm. 736 

 Nearsightedness, 580 

 Necator americanus, 808 

 Necturus, 450. 840 

 Need ham, Joseph, 729 

 Negroid races, 750 

 Nekton. 795 



Nematocvsl. 184, 185, 199 

 Nematoda. 227, 833 



reproduction in. 229 

 Nematomorpha, 834 

 Nemertea, 220, 232, 834 



circulatory system of, 233 

 Neodarwinism. 700 

 Neognathae, 481, 841 

 Neolithic culture. 752 

 Neoptera. 313, 837 

 Neornithes, 481, 841 

 Neoteny, 392, 450 

 Neotropical realm, 736 

 Nephridia, 93, 245, 249 

 Nephridial tubules, 223 

 Nephridiopore, 245 

 Nephrogenic ridge, 645 

 Nephron, 559, 562 



evolution of, 565 

 Nephrostome, 565 

 Nereis, 270-279, 834 

 Nerve cord, 384, 390 

 Nerve impulse, 104, 585 

 Nerve net, 104, 187 

 Nerve nuclei, 599 

 Nerve ring, 187, 369 



