882 Index 



Megasporangia, 136,* 140,* 193, 200- 



203, 225 

 Megaspore, 136,* 140,* 142, 143, 193, 



194, 200-203, 206, 225 

 Megasporophyll, 138, 140,* 142, 193, 



200-203, 206, 225* 

 Meiosis (reduction division), 187, 357, 



697, 709 



Meissner's corpuscle, 495 

 Melanin, 422,* 758 {see also Pigments) 

 Melanoplus {see Grasshopper) 

 Membrane, cell, 39, 40,* 393 



nictitating, 438 



permeability of, 39 



plasma, 39, 40*, 156* 



sieve, 282* 



undulating, 279* 

 Mendel, Gregor, 683-685, 803 

 Mendel's laws, 683-685 

 Meninges, 503 

 Menstruation, 516 

 Merle collies, 707* 

 Merozoite, 365,* 366 

 Mesenchyme, 46, 280, 284,* 295, 309, 

 381, 449,* 454 



Mesentery, 289, 290, 291,* 306, 488* 

 Mesoderm, 292, 293, 295, 299, 306, 



309, 314, 325, 368, 373, 445,* 



449,* 451, 453 



Mesoglea (mesogloea), 280, 286, 286,* 

 287,* 288* 



Mesonephros, 842 

 Mesophile, 122, 170 

 Mesophyte, 653 

 Mesothelium, 842 

 Mesozoic era, 614, 616 

 Metabolism, 92, 101, 625 

 Metacarpal, 423, 425, 462,* 466 

 Metagenesis, 117, 130-149, 154, 160, 

 164, 185-198, 285,* 286 



Metamere and metamerism, 314-340, 

 738* 



Metamorphosis {see also Reproduction) 

 of frog, 448* 

 of insects, 410, 414-418 

 complete, 413,* 418 

 gradual, 411, 412* 

 incomplete, 411, 412* 

 none (ametamorphosis), 410, 411* 



Metaphase (mitosis), 62, 63,* 65, 66, 



67 

 Metaplasmic granule, 40,* 43 

 Metaplast, 44 

 Metastasis, 583 

 Metatarsus (metatarsal), 400, 401,* 



423,* 425,* 462,* 466 

 Metridium {see Sea anemone) 

 Microgamete, 843 



Microgametophyte, 142, 143, 194, 201- 



204, 206, 225* 

 Micromere, 444 



Micronucleus, 279,* 349, 350,* 356* 

 Microphyll, 135 

 Micropyle, 140,* 142, 144,* 201-203, 



213, 225,* 406 



Microscope, 27-36, 28,* 30,* 32*-34* 

 Microsome, 349, 354* 

 Microsporangium, 136,* 140,* 193, 



201-203 

 Microspore, 136,* 140,* 142, 143, 193, 



194, 200-204, 206, 225 

 Microsporophyll, 140,* 142, 193, 201- 



203, 225* 

 Midbrain, 54, 445,* 456,* 502, 503 

 Migration, 655, 656 

 Mildew, 127, 129, 177 

 Millipede, 318, 324,* 543, 544 

 Mimicry, 730 



Mimosa {see Sensitive plant) 

 Mineral salts, 89 

 Mineralization, 611 

 Miracidium, 375,* 376, 787* {see also 



Liver fluke) 



Mites, 319, 326,* 543, 544, 545,* 554* 



Mitochondria, 40,* 41 



Mitosis, 62-72, 63,* 64,* 66,* 68,* 



69,* 349, 673, 680 

 Mixture, 85 

 Mohl, von, 37 



Mold, black bread (Rhizopus), 124,* 

 125, 173 

 blue (Aspergillus), 125-129, 126,* 



175 

 blue (PeniciUium), 125-129, 126,* 



167, 175 

 bracket fungus, 128,* 129 

 cup fungus, 127,* 176 

 mushroom, 128,* 129,* 177-179, 

 178* {see also Basidiomycete) 

 slime, 122-124, 123,* 172 

 water (Saprolegnia), 125, 173, 174* 

 yeast, 125,* 176 



Molecule, 77-79, 79,* 81,* 83,* 750 



Molgula, 328* 



Mollusca, 309-314, 309*-316,* 541, 542 



Molting, 944 



Monecious, 175, 186, 200, 202, 309, 

 372, 376, 391 



Monilia {see Yeast) 



Monkey, 340 



Monocotyledoneae, 110, 143-148, 207, 

 209, 222 



Monocotyledons and dicotyledons con- 

 trasted, 143, 207 



Monocystis, 275, 277,* 534 



Monohybrid cross, 686, 688 



Monosaccharide, 87 



