INDEX 



751 



Mepacrine, 77 



Merism, 109 



Mermaids' purses, 336 



Mermis nigvescens, 144 



Meroblastic segmentation, 644 



Meropodite, 197 



Merozoite, 72, 74, 77 



Mesencephalon, 608 



Mesenchyme, 638 



Mesenteries of sea-anemones, 115 



Mesenteron (midgut) oi A scar is, 137 



of chick, 656 



of cockroach, 232 



of crayfish, 204 



of frog embryo, 640 



of tadpole, 640 

 Mesentery, 420 

 Mesobiast, 187, 623, 624, 633, 641, 



648, 650 

 Mesoblastic somites. See Somites 

 Mesoderm, iii, 187, 192, 621. See 

 also Mesobiast 



of chick, 649 

 Mesogloea, 90 

 Mesonephros, 615 



of chick, 657 



of frog, 643 

 Mesoptetygium, 321 

 Mesorchium, 379 

 Mesothelium, 530, 638 

 Mesothorax, 228 

 Mesovarium, 380 

 Metabolism, 14 

 Metacarpal quills, 394 

 Metacarpus, 359, 405, 418 

 Metacercaria, 126 

 Metacromion, 435 

 Metagenesis, log, 133 

 Metameric segmentation, 192 

 Metamorphosis of insects, 246, 247 



of lancelet, 625 



of starfish, 294 



of tadpole, 345, 637 

 Metanephros, 615, 618 

 Metaphase, 688, 694 

 Metapleural fold, 300 

 Metapodials, 419, 492 

 Metapophysis, 424 

 Metapterygium, 321 

 Metasoma, 223 

 Metastome, 203 

 Metatarsus, 359, 406, 41S 

 Metatheria, 494 

 Metathorax, 228 

 Metazoa, 79 

 Metencephalon, 608 

 Metridium, 115 

 Mice, 485 



Microcheiroptera, 478 



Microgametes, 73, 77 



Micromere, 672 



Micromys, 485 



Micronucleus of Paramecium, 48 



of Vorticella, 57 

 Microphagy, 304, 344, 486, 589 

 Microtinae, 485 

 Microtus agresiis, 485 

 Midges, 260 



Midgut. See Mesenteron 

 Midriff, 420 

 Milk, 418, 471, 474 



pigeon's, 414 

 Mill, gastric, 205 

 Millipedes, 222 

 Miner's worm, 143 

 Miracidium, 125 

 Mites, 223 



Mitochondria, 499, 302 

 Mitosis, 688 



in Amceba, 34 



in Paramecium, 51 

 Mitral valve, 448 

 Mole, 476 

 Molge, 548 



Mollusca, 264, 2S3, 672 

 Monkey, 558 

 Monocystis, 43, 80 



magna and lumbrici, 45 



life-history of, 44 

 Monosiga, 83 

 Monotremata, 4g6, 579 

 Morgan, T. H., 696 

 Morphogenesis, 109 

 Morphology, 24 

 Morula, 663 

 Mosaic image, 214 

 Mosquitoes, 73, 257. See Gnats 



and disease, 76 



mouth parts of, 242, 257 

 Motacilla, 707 

 Moths, 243, 244, 245, 2j4 

 Moulting, of crayfish, 201, 205 



of insects, 227, 245 

 Mouse, 485 

 Mouth, 438, 509, 593. See also 



Canal, alimentary 

 Mucus, 264, 509 

 Mud-puppy, 549 

 Miillerian duct, 643, 657 

 Multiple fission, 35, 44, 69 

 Murinae, 485 

 Mus, 485 

 Musca domestica, 259 



life-history of, 258 

 Miiscardinus avellanar'ius, 485 

 Muscle, 506, 520, 539 



