INDEX 



827 



Grasshopper — ( Continued) 



abdomen, 604 



development of, 613 



ecology, 600 



head, 600-602, 603 



hearing, 61 1 



metamorphosis, 597 



thorax, 601-603 



wings, 603 

 Gravity, 81 



Grebes, courtship of, 748 

 Green frog, life history, 690 

 "Green glands," 582 

 Gregarines, 444 



Guanin, 671, 672, 674, 680, 691, 692 

 Guanophores, 691 

 Guard cells, 60, 61 

 Guttation, 63 



H 



Hair, 126, 129, 130 



human, 131 

 Hair follicle, 128 

 Hair papilla, 128 

 Hair shaft, 157 

 Haldane, J. B. S., 411 

 Halichondria, 455 

 Haploid, 43, 46 

 Harvestman spider, 623 

 Harvey, W., 222, 223 

 Haversian system, 117, 118 

 Heart, 214, 215, 786 



earthworm, 560 



frog, 697, 698 



human, 218 



insect, 607 

 Heartbeat, bird, 744 * 



control of, 217 

 Heidelberg man, 773 

 Heliozoans, 442 

 Helix, 643 

 Hell-bender, 684 

 Heloderma, 714, 719 

 Hematin, 203 

 Hemichorda, 663-664 

 Hemiptera, 593 

 Hemocoel, 605, 607 

 Hemoglobin, 125, 199, 200, 202-204, 236, 



417 

 Hemophilia, 212, 406-408, 411, 415 

 Hemosporidia, 444 

 Hepatic ducts, 189 

 Hepatic veins, 216 

 Herbivorous animals, 172 

 Herbivorous teeth, 180 

 Heredity, 388, 389, 414, 449, 786, 787, 792 



as force in evolution, 784 



human, 415-418 

 Hermaphroditism, 338, 339 



arrow worms, 551 



Hermaphroditism — (Continued) 

 bryozoans, 546 

 ctenophores, 497 

 earthworms, 564 

 leeches, 571 

 liver fluke, 511 

 planaria, 504 

 ribbon worms, 537 

 tapeworms, 514 

 Hernia, inguinal, 342 

 Herrick, 591 

 Hexapoda, 590, 594 

 Hibernation, reptiles, 722, 723 

 Hiccough, 241 



Hindbrain, 294, 302, 304, 305, 372 

 Hindgut, 606 

 Hippocampus, 103 

 Hippodaniia convergens, 591 

 Hippospongia, 464 

 Hirudin, 569, 571 

 Hirudinea, 569-571, 798 

 Hirudo medicinalis, 570 

 Histology, 107 



Holothuroidea, 652, 654, 798 

 Homarus americana, 588 

 Homo heidelbergensis, 11 "i 

 Homo neanderthalensis, 111, 713 

 Homo rhodesiensis, 113 

 Homo sapiens, 112, 773, 788, 795 

 Homo sapiens fossilis, 773 

 Homologous parts, 782 

 Honey stomach, 617 

 Honeybee, 3, 612-621 

 development, 339 

 salivary glands, 180 

 sense of smell, 312, 620 

 Hoofs, 129, 131, 132 

 Hookworm, 100, 524-526 

 Hormiphora plumosa, 494 

 Hormones, 32, 66, 199, 255-257, 267, 268, 

 271, 272, 275, 277, 304, 335, 349, 

 404, 407, 409. 609 

 gonadotropic, 271, 343, 344, 346, 349 

 luteotrophic, 348, 350, 352 

 placental, 382 

 Horned toad, 714, 718 

 Horns, 126, 129, 132 

 Horse, 763, 765, 799 

 evolution of, 785 

 speed of mammals, 755 

 Horsehair worms, 530, 797 

 Horseshoe crab, 574, 798 

 Human embryo, 378, 380, 382 

 Humerus, 143, 148, 150, 158, 693, 725 

 Hummingbird, 729 

 Hyaloplasm, 26, 35 

 Hyaluronidase, 352 

 Hybrid, 399, 400, 402, 414 

 Hydra, 3, 20, 38, 70, 178, 242, 465, 468- 

 478, 797 

 digestion, 476 



