INDEX 



863 



Leukocytes, 542 



Liebig, J., 66 



Life, origin of, 710 



Life zones, fresh-water, 797-798 



marine, 794, 797 



terrestrial, 789-794 

 Ligament, 56 



Light, effect on animal distribution, 761 

 Lignite, 756 

 Limnetic zone, 797 

 Limnopitliecus, 741 

 Limulus, 320, 835 

 lAngtda, 838 

 Linkage, 663 

 Linkage group. 666 

 Linnaeus, Karl, 10, 143 

 Lipase, 67, 81, 523 

 Lipophores, 396 

 Littleneck clams, 253 

 Littoral zone, 797 

 Liver, 520 

 Liver flukes. 214 

 Living fossil, 371 



Living things, characteristics of, 14 

 Lizards, 459 

 Loa, 834 



Lobes of brain, 602 

 Locomotion of worms, 273 

 Locomotor cilia, 379 

 Locus, 652 

 Loligo, 260, 834 

 Loons, 483 

 Loop of Henle. 562 

 Lophophore, 355, 356 

 Lorises, 494 

 Louse, 802 



Lower Paleolithic culture, 751 

 Loxodonta, 842 

 Luciferase, 76 

 Luciferin, 76 

 Lugworm, 281 

 Lumbricus, 270-279, 835 

 Lungfish, 437, 442 

 Lung fluke, 214 

 Lungs, 87, 518, 559 



birds, 476 



evolution of, 476 



fishes, 439 



frog, 406, 451 



mammals, 488 



toad, 451 



vertebrates, 532 

 Luteinizing hormone, 626 

 Lycaenops, 466, 840 

 Lyell, Sir Charles, 697 

 Lymph, 537, 538 

 Lymph capillaries, 538 

 Lymph nodes. 538 

 Lymph sacs. 408 

 Lymph vessels, 408, 538 



Lymphatic system, 545 

 Lymphatic vessels, 556, 557 

 Lymphocytes, 59, 542 

 Lynx, 773 

 Lysis, 542 



M 



Macromeres, 241 

 Macromutation, 706 

 Macronucleus, 160 

 Madreporaria, 833 

 Madreporite, 365, 381 

 Magendie, Francois, 10 

 Maggots, 342, 804 

 Magnesium, 23, 68 

 Magnus, Albertus, 9 

 Malacostraca, 293, 836 

 Malaria, 1 16, 165, 814 

 Male sex hormones, 627 

 Malformations, 137 

 Malleus, 466, 511, 583 

 Mallophaga, 802. 837 

 Malpighi, Marcello, 10 

 Malpighian tubules. 93, 310, 322 

 Makase, 81, 517 

 Maltose, 26, 517, 524 

 Mammal-like reptiles, 465 

 Mammals, 390, 468, 842 



characteristics of, 486 



development of, 637 



excretory system, 489 



eye, structure of, 576 



heart of, 551 



reproduction in, 489 



respiratory system, 488 



skeleton, 508 



teeth of, 487 

 Mammary glands, 489, 506, 572 

 Mammoths, 500 

 Man, 496 



blood pressure, 555 



blood velocity, 555 



circulatory system, 548 



digestive system, 517 



evolution of, 738-752 



muscles, 513 



respiratory system, 531 



skeleton of, 509 

 Man apes, 743 

 Manatees, 500 

 Manatus, 842 

 Mandible, 291, 296 

 Mandibular arch, 432, 508 

 Mandrills, 740 

 Manis, 842 

 Manta, 437, 839 

 Mantle, 246, 385 

 Mantle cavity, 254 

 Manubrium, \ 8^ 



