INDEX 



523 



Gum, 135 



Guppy, 113 



Gustatory cell, 211 



Gymnodinium, 51 



Gymnura, 128, 129, 320, 321, 323, 479 



Gypsy moth, 412 



Habit, 347 



Habituation, social, 437, 438 



Hagfish, 113 



Hair, 15, 97, 111, 126, 134, 181 



Hairworm, 80 



Hales, 462 



Halibut, 115 



Haller, 460, 467 



Hand, 130, 143, 177, 430, 431 



Haploid, 245, 248, 249, 303 



Hare, 325 



Harpoon, 440 



Harvest mite, 95 



Harvey, 168, 451, 452, 454, 466, 467 



Hay infusion, 43-45, 220, 317 



Head, 132, 206, 330, 371 



Health, 339, 389-403 



Heart, 105, 133, 146-149, 158, 163, 



169-179, 364, 365, 452 

 Heat, animal, See: Temperature 

 Heat sense spots, 211 

 Hedgehog, 128, 129, 321 

 Heidelberg man, 434, 438 

 Heliozoa, 49 

 Hematochrome, 32 

 Hemiptera, 94, 324 

 Hemoglobin, 166, 367; See: Blood 

 Hemophilia, 307, 308 

 Hen, 190, 251, 253, 274 

 Henderson, 316 

 Hepatic, artery, 170, 173; duct, 155; 



portal, 172, 173; vein, 172, 173; 



See: Liver 

 Herbal, 450, 451 

 Herbivorous, 129, 357 

 Heredity, 3, 281-315, 377-384, 420- 



425, 468-470; See: Inheritance 

 Hermaphrodite, 188, 189, 396, 399 

 Hertwig, 14, 57 

 Hessian fly, 409 

 Heteroploidy, 310 

 Heterozygous, 291-299, 382; See: 



Hybrid 

 Hexuronic acid, 23, 159 

 Hibernation, 117 

 Hind-brain, See: Brain 



Hippocrates, 448 



Hippopotamus, 130 



Hirudinea, 81, 82 



Histology, 3, 4, 462, 464-466 



History of biology, 2, 3, 218-221, 446- 

 476 



Hive, 330, 334 



Holothuroidea, 86 



Holozoic, 44 



Hominidae, 428, 480 



Homo sapiens, 436; See: Man 



Homologous chromosomes, 302-505, 

 308; See: Synapsis 



Homologous genes, 302, 308 



Homology, 107, 354-356, 459 



Homothermal, 123, 126, 178, 319; 

 See: Temperature 



Homozygous, 291-299 



Honey bee, 260, 327-336, 414 



Hoof, 134, 362-364 



Hooke, 452 



Hookworm, 80, 401 



Hormone, 160, 169, 192, 193, 196- 

 198, 306, 367 



Horn, 134 



Horned-toad, 122 



Horse, 321, 352, 355, 361-364 



Horse botfly, 94, 405 



Host, 52, 339, 340, 342; See: Parasite 



House fly, 93, 375, 407 



Human, body composition, 21; hand, 

 143, 431; heredity, 283, 285-288, 

 299-301, 306-315; origin, 426-445; 

 posture, 143, 431, 435, 436; skele- 

 ton, 356 ; welfare, 386-425 ; See: Man 



Humerus, 141, 142, 144, 355 



Hummingbird, 126 



Huxley, 5, 227, 228, 251, 263, 349, 

 358, 361, 459 



Hyaloplasm, 18, 19 



Hybrid, 290, 314, 382-384 



Hydatid, 400 



Hydra, 8, 71, 73, 98-100, 150, 188, 

 189, 199, 209, 210, 231, 233, 235, 

 337, 344, 477 



Hydranth, 73 



Hydrolysis, 151 



Hydrozoa, 71-73, 234 



Hymenoptera, 94, 478; See: Bee 



Hyoid, 142 



Ice age, 359; See: Pleistocene epoch 

 Ichneumon fly, 414 



