658 



INDEX 



T;caf arraneoinent, 250 

 Leeches, 93, 103 

 Leg 



fore, 332 



hind, 332 

 Legs, evolution of, 532, 543 



of worker bee, 207 

 Lemurs, U5, 514, 535, 536, 545 

 Lens, 359, 360 

 Lenticels, 2Jf8 

 Lepidoptera, 102 

 Leptorhynchoides, 87 

 Leuckhart, 467 

 Leucocytes, 303 

 Leucoplasts, 465 

 Lice, 216 



head, 223 

 Lichen, 55 

 Liebig, 312 

 Life 



in air, 23-24 



definition of, 126 



in the hive, 213 



in water, 21-23 



on land, 24-25 



signs of, 127 

 Life realms, 42, 43 

 Life zones, 41-42 

 Light, 490, 492 



a stimulus, 14 

 Light-perceiving organ, 344 

 Light receptors, 357 

 Lignin, 264 

 Ligula, 203, 205 

 Limax, 97 

 Limestone, 478 

 Limulus, 314, 499, 514 

 Linin fibers, 141 

 Linkage, 458-461 

 Linnaeus (Linne), 64, 65, 66, 506, 517, 



530 

 Linophryne, 491 

 Lion, 508 

 Lipase, 280, 295 

 Liver, 293, 296, 321 

 Liver fluke, 490 

 Liverworts, 73 

 Living matter, chemical organization 



of, 130-131 

 Lizards, 103, 111, 499, 514, 532 

 Llama, 508, 509 

 L'Obel, Matthias, 64 

 Lobsters, 99, 333, 500 

 Locomotion 



the "why" of, 334 



ways of, 38-40 

 Locomotor organs, 233, 334 

 Locust, sex inheritance in, 467, 468 

 Loeb, Jacques, 357, 367-368 



Loons, 113 

 Louse, body, 620 

 Lumbar plexus, 497 

 liUmbricus, 93 

 Lung books, 313 

 Lung-fishes, 107 



rise of, 513 

 Lungs, 316, 322 

 Lycopodium, 75 

 Lycopsida, 75 

 Lymph, 298, 299, 304 

 Lymphatic system, 304 

 Lymph nodes, 292, 304 

 Lymphocytes, 304 

 Lysins, 626 

 Lytic power of parasites, 217 



Macaques, 537 



MacDougal, D. T., 251 



McClung, 467, 468 



McCollum, 278, 279 



MacCurdy, 549, 553 



Mclndoo, 204 



Macleod, 296, 397 



Macrolecithal, 421 



Macronucleus, Paramecium, 160, 161, 



162 

 Macropus, 115 

 Macula lutea, 360 

 Madreporite, 335 

 Magellania, 91 

 Magnesium, 277 

 Maize, 457, 515 

 Malaria, 220 



economic importance of, 618-619 



life cycle of, 227 



preventive measures for, 618-619 

 Malays, 562 

 Male pronucleus, 417 

 Mallophaga, 100, 524 

 Malpighi, 209 

 Malpighian corpuscle, 324 

 Malpighian tubules, 209, 321 

 Maltase, 280, 295, 297 

 Malthus, 519 

 Maltose, 293 

 Mammalia, 103, 115 

 Mammals, 488, 491, 497, 501, 513, 533, 

 553 



conservation of, 600 

 Mammary glands, 489 

 Mammoth, 478, 557 

 Man, 115, 513, 532, 545, 553, 637, 638 



parasitic worms of, 613-614 

 Mandibles 



bee, 203, 205 



locust, 201 

 Mandrill, 537 

 Marchantia, 73 



