INDEX 



Metachronal wa\es, in Paramecium, 251 

 Mctae;enesis, 302 

 Metalloproteins, 27, 28 

 Metamerism, in annelids, 421 

 Metamorphosis, 159; of Antedon, 507, 508; of 

 Arbaaa, 501; of ascidians, 547, 548; of 

 brachiopods, 365; of echinoderms, 486; of 

 ectoprocts, 360; of entoprocts, 356; of froe;, 

 634; of insects, 455; of moth, 466, 467, 

 468; of A'ems, 400; of pilidium, 343; of 

 starfish, 496 

 Metanephridia, of invertebrates, 519 

 Metanephros, 57, 129 

 Metaphase, 43, 136 

 Metatheria, 579, 582, 583, 585; adaptive 



radiation in, 609 

 Metazoa, 216, 221, 225; origin and evolution 



of, 619; origin of, 264-268 

 Metencephalon, 87, 102 

 Method of science, 5 

 Melridntm, 306, 307, 528 

 Mice, inheritance in, 178, 186, 187 

 /\/;(Tononfl, 273,281 

 Microdissection, 15 



Microa;amete, 137, 141; of Plasmodium, 247 

 Micronucleus, of Paramecium, 248, 250, 254, 



255 

 Microors^anisms, place in food chains, 607 

 Microphaa;es, 64 



Microscope, 11, 141; compound, 13, 15; elec- 

 tron, 14, 15, 16; liu;ht, 13, 14; phase- 

 contrast, 14 

 Microscopic anatomy, see Histology 

 Microsomes, 20 

 Middle ear, 48. 90, 108 

 Middle piece, 137 



Migration, 598; from centers of origin, 631; 

 of earl v man, 640; of locusts, 444; of salmon 

 and eels, 602 

 Milkweed butterfly, 466 

 Millipedes, 478, 479 

 Mirabilis jalapa, 178 

 Miracidium, 330, 331 

 Mites, 480, 482 

 Mitochondria, 19, 119 

 Mitosis, 39-45, 40 

 Mitotic spindle, 20, 39, 40, 41 

 Mixed nerves, 101 

 Alnemiopsis, 312 

 Moerilhenum, 628, 629 

 Mole, 579, 584; marsupial, 609 

 Mole cricket, 462 

 Molgula, 545, 546, 547 



Moilusca, 216, 219, 221, 223, 368-394; adap- 

 tive radiation in, 393 

 MoUusks, as food of starfishes, 491; calcium 

 requirements of, 601; circulatory system in, 

 516; exoskeleton, 528; fossil remains, 621; 

 nervous integration, 525; reproduction, 533 

 Molting, in arthropods, 484, 529; in cray- 



696 



fish, 430, 456; in locust, 445; in nematodes, 

 350, 352, ,529 

 Monarch butterfly, 466 

 Monaxonida, 272 

 Mongoose, 591 

 Monitor lizard, 57 1 , 572 

 Monkey, 580, 591, 638; malaria in, 247 

 Mnnocyslis, 244, 245 

 Monocyte, 64 



Monoeciousness, significance of, 534 

 Monogenea, 328 

 Monohvbridization, 175, 176, 177, 178, 179, 



185,188 

 Monosaccharides, 26, 77 

 Monosioa, 242, 243 

 Moray, 560 



Morgan, T. H., 181,182 

 Morphology, 8 

 Moruloidea, 270 

 Mosasaur, 566, 568 

 Mosquito, 474, 475, 485; control methods 



for, 476 

 Moths, 466, 467, 468 

 Motor centers, 103 

 Motor end plate, 98, 113 

 Motor neuron, 98 

 Motor root, 98 



Motorium, in Paramecium, 251 

 Mouse, 580, 590; marsupial, 609 

 Mousterian culture, implement of, 645 

 Mouth, 48; in Hydra, 287 

 Mouth cavity, 48, 60; digestion in, 70 

 Mouth parts, of crayfish, 426; of locust, 446, 



447 

 Movement, euglenoid, 239 



Mucous membrane, 69 



Mucus, in copulation of earthworms, 411, 

 412; in feeding of bivalves, 372; in feeding 

 of Crepidula, 384; in feeding of ctenophores, 

 310; in feeding of polychaetes, 401 



Mud daubers, 470 



Mud puppv, 214, 377, 564 



Muller, H. J., 207 



Multicellular animals, 10 



Multiple allelomorphs, 197, 199 



Multiple fission, 245 



Mus musculus, 590 



Miisca domestica, 475 



Muscle cells, 67-68, 77 



Muscle contraction, 77, 98, 113 



Muscle fibrillae, 67 



Muscle impulse, 1 1 3 



Muscle layers, 69; circular, 69; longitudinal, 

 69 



Muscle tone, 1 1 3 



Muscles, 68, 95, 103, 113 



Muscular dystrophy, 32 



Muscular fatigue, 1 14 



Muscular system, 87, 91-95 



Muscularis mucosae, 70 



