878 Index 



Gonidia, 122, 167, 172 

 Gonionemus, 288,* 289 

 Graafian follicle, 450, 515 

 Grana, 229, 230* 



Grantia (scypha, sponge), 279, 281, 

 281*-284* 



Granular theory, 74, 75* 

 Granules, 47, 349, 353*-355* 

 Granulocyte, 484-486 

 Grasshopper, 319, 393-398, 412* (see 

 also Insects) 



Graves' disease {see Endocrine glands) 

 Gravity, 627 

 Gray, Asa, 803 

 Gray matter, 55,* 503, 505 

 Green algae {see Algae) 

 Gregarious, 658, 665 

 Grew, Nehemiah, 29, 802 

 Ground pine, 192, 257 

 Growth, 70, 94, 95, 101, 105 

 Guanin, 758 



Guard cell, 56, 57,* 58,* 145* 

 Guinea pig heredity, 686, 686,* 687, 

 688 



Gullet, 290, 291,* 350,* 358, 358* 

 Gums from plants, 262, 268 

 Gymnospermae, 110-112, 138, 200- 

 205 

 economic importance, 257 



Gynandromorph, 834 



H 



Habitat, 318, 319, 594 

 Hair, 211, 340, 391, 459-461, 460* 

 Halters, 409 



Hammer bone, 466, 498,* 505 

 Haploid, 162, 357, 679, 680, 709 

 Harvestman, 326,* 547 

 Harvey, William, 801 

 Haustoria, 177 



Haversian canal, 49, 50,* 51* 

 Head, 308,* 310, 311, 318, 319, 329 

 393, 394* 



Health and biology, 778 



Heart, 314, 315,* 321,* 322,* 325,* 



326,* 385,* 388, 390, 395, 



396,* 403,* 405, 430, 430,* 



477-481, 478*-481,* 491* 



chambers of v^ertebrates, 331-340, 



740,* 741* 

 urchin, 303 



Heat, 87, 231, 760, 761 



Helianthus {see Sunflower) 



Helix, 311,* 312,* 542 {see also Snail) 



Hellbender {see Salamander) 



Hellgrammite, 562,* 563 



Hematin, 237, 263 



Hemichordata, 326,* 327, 327* 

 Hemocoel, 314, 393, 396, 400, 405 

 Hemoglobin, 390, 434, 484 

 Hemolysis, 659 



Hemophilia, 702 {see also Heredity) 

 Hemopyrrole, 237 

 Henle's loop, 493* 

 Heparin, 487 

 Hepatic, 301* 



Hepaticae, 109, 130, 131, 131,* 132,* 

 186 {see also Liverwort) 



Herbaceous, 207 

 Herbivorous, 105, 835 

 Heredity (genetics), 24, 102, 621-625, 

 673-720, 722, 746 



blood groups, 489, 524-526 



chromosomes {see Chromosomes) 



definition, 673 



genes {see Gene) 



human, 522-526, 712-719 



Mendehan, 683-685 



methods of study, 673 



Hermaphroditism, 292, 309, 312,* 372, 

 376, 391, 699 



Heteroauxin, 240, 768 

 Heterocyst, 118,* 154, 155 

 Heterodera, 539, 661 

 Heterogamous, 115, 118, 125, 154, 155, 

 161, 162, 167 



Heteronomous, 835 

 Heterosis, 705 



Heterospory, 142, 143, 192, 200, 203, 

 206 



Heterotrophic, 119, 167, 168 

 Heterozygous, 682, 685 

 Hexactinellida, 281 

 Hexagonal area, 349, 353,* 354* 

 Hibernation, 594 

 Highways, 595, 629 

 Hiilier, 35 

 Hilum, 144,* 212 

 Hindbrain, 743* 

 Hippocrates, 801 

 Hirudinea (leeches), 308,* 309 

 Hirudo (leech), 306, 308,* 309, 541, 

 788 



Histology, 24 



Histomonas, 534 



History of biology, 800-806 



Holdfast, 116, 151, 160, 161, 304, 307* 



Holoblastic, 444 



Holophytic nutrition, 359 



Holothurioidea, 303, 306* 



Holozoic nutrition, 836 



Homo sapiens, 589 {see also Man) 



Homologous chromosomes, 682 



Homology, 576, 577,* 578* 



I 



