INDEX 



829 



Lakes, 75 



Lamarck, J., 788, 789 



Laminaria, 56 



Lamp shell, 533, 547, 548, 797 



Lancet, 664 



Landsteiner, K., 209 



Langerhans, islands of, 191, 252, 267, 268 



Larva, 598, 686 



Larynx, birds, 241 



human, 182, 206, 236, 237, 240 

 Lateral line, 668. 678. 679, 708 

 Leadership and foUowership, 102, 104 

 Leaf, 60, 61 

 Lecithin, 170 



Leeches, 569, 570, 571, 798 

 Leeuwenhoek, A., 538. 539 

 Lemur, 769, 799 

 Lens vesicle, 373 

 Lenses. 321-323, 330 



compound eyes, 322. 323 

 crystalline, 326-328, 677 

 development, 374 

 vertebrate. 322 

 Leopard frog. 687, 689 

 Lepidoptera, 593 

 Lepidoscelio, 601 

 Leucocytes, 123, 124, 201, 202, 204-208, 



209. 698 

 Leucon, 457 



Leucosolenia. 455, 456. 461 

 Life, beginning of. 778, 779 



increase of, 780 

 Light. 86 



Light receptors, 426, 611 

 Lignin, 53 



Limbs, evolution of, 146 

 Limpet, keyhole, 634 

 Limulus, 574 

 Linens socialis, 535, 536 



vegetus, 535 

 Lingula, 533, 548, 549, 782 

 Linnaea, 55 

 Linnaeus, C, 55, 57 

 Lipase, gastric, 185-187, 696 

 Lipocaic, 267 

 Lipochromes, 733 

 Lipophores. 691 

 Liquid. 19, 21 

 Liquor folliculi. 344 

 Littorina litorea, 75 

 Liver, 216. 252 

 bird, 743 



development of, 375 

 fish. 673 

 frog. 697 

 human, 189, 256 

 lobster, 580 

 mollusk, 639, 640 

 Lizards, 666, 713, 716, 718. 799 

 fence, 714 

 Gila monster, 714 



Lizards — (Continued) 



horned toad, 714 



six-lined, 714 

 Locomotion, 65, 135-154, 155-167 



bird, 739-741 



fish, 670, 673 



hydra, 470, 471 



planaria, 501 



reptiles, 714, 715 



starfish. 657 

 Locustidae, 600 

 Loeb, J., 339 

 Loligo. 647, 649, 650 

 Lophophore, 544, 546. 547, 548, 549, 551 

 Louse, 97, 98 

 Lumbarsacral plexus, 291 

 Lumbricns terrestris, 555-567 

 Luminescent ctenophores, 493, 497 

 Lungs, 230, 232, 236 



bird. 743 



evolution of, 234 



frog, 697, 700, 702 



human, 233. 235, 238, 239 



mammals. 752 

 Lymantria, 257 

 Lymnaea. 510 

 Lymph, 119, 123, 195-197, 213, 215, 701 



capillary, 197 



origin. 212 



relation to blood, 213 

 Lymph hearts, 701. 702 

 Lymph nodes, 214, 215 

 Lymph sinuses, 701 

 Lymph vessels, 194, 214 

 Lymphocytes, 202, 205-209, 213, 215, 701 



M 



McClung, C. E., 405 



Mackerel, 670 



Macleod, J. J. R., 268 



Macrobdella decora, 570 



Macrocystis, 56 



Macronucleus. 428 



Macrophages, 203, 475 



Macropus major, 756, 759 



Magnesium, 174, 199 



Malaria, 100, 429, 444, 445, 447, 448 



Malleus, 316, 319, 320 



Mallophaga, 593 



Malpighi, M., 253, 609 



Malpighian body, 246 



Malpighian layer, 127. 128 



Malpighian tubules, 605, 606. 609. 617, 625 



Maltase, 187. 192 



Malthus, T., 789. 791 



Mammals, 666, 752-773, 799 



egg-laying, 728, 754. 799 



limbs of. 784 



marsupial, 728, 755, 799 



placental, 728, 756, 759, 799 



