706 



INDEX 



Heron, 433, 446, 452, 461 

 Herpetology, 10 

 Herring, 393, 395 

 Hesperiidae, 265 

 Hesperornis, 458 

 Hesperornithiformcs, 458 

 Hessian fly, 258 

 Heterakis, 154, 155 

 Heterocercal tail, 368, 387 

 Heterodon, 418 

 Heterodont teeth, 474 

 Heterodontia, 376 

 Heteromida, 395 

 Heteromorphosis, 559 

 Heteronomous segmentation, 89 

 Heterophyes, 145 

 Heterozygous trait, 575, 581 

 Hexanchida, 376 

 Hexasteropha, 101 

 Hibernation, amphibia, 399 



mammals, 479 

 Highways, 649 

 Hindgut, 235 



Hindlimb, 326, 346, 358, 438 

 Hindwing, 245 

 Hinge, clam, 284 



joints, 503 



ligament, 286 

 Hippoboscidae, 265 

 Hippopotamus, 464, 487 

 Hirudin, 195 



Hirudinea, 170, 171, 190, 192, 196 

 Hirudo medicinalis, 170, 190, 191, 

 196 



digestion, 190 



metamerism, 190 



respiration, 190 



suckers, 190 

 Hirundinidae, 462 

 Histology, 10, 84 

 Histomonas, 154 

 History of animal life, 601-627 



zoology, 652 

 Hoatzin, 445, 461 

 Hogfish, 389 

 Hognose snake, 416 

 Holoblastic cleavage, 81, 82 



egg, 180 

 Holocephah, 376 

 Holophytic nutrition, 512 

 Holosteica, 379, 394 

 Holothuroidea, 304, 313 

 Holotricha, 64 

 Holozoic nutrition, 512 

 Homarus, 198, 217, 221 

 Hominidae, 489 

 Homo, 489, 495,625, 626 



{see Man) 

 Homocercal tail, 387 

 Homodont teeth, 474 

 Homologous appendages, 205 



chromosomes, 583 



forelimbs of vertebrates, 613 



organs, 90 



Homologous (Cont.): 



structures, 203 

 Homology, serial, 203 

 Homonomous segmentation, 89 

 Homoptera, 229, 241, 246. 256, 



258, 260, 264 

 Homozygote, 578 

 Homozygous trait, 575, 581 

 Honey bee, 251, 265 



adaptations, 245 



behavior, 252 



bread, 251 



castes, 251 



egg, 251 



eye, 233 



"language," 252 



larva, 251 



life cycle, 251 



honey, 251, 254 



pollen, 251, 255 



pupa, 251 



round dance, 252 



royal jelly, 251 



senses, 253 



tail-wagging dance, 252 

 Hood, 296 

 Hoof, 474 



Hoofed mammals, 487 

 Hook, 141, 144 

 Hooke, 29, 653 

 Hooklets, feather, 435 

 Hookworms, 155-156, 157 

 Hormiphora, 131 

 Hormone, 249, 544, 551 



interrelations of, 554 



invertebrate, 551 



man, 551 

 Horn, 473 



nasal, 473 



sheaths, 473 

 Hombills, 462 

 Horned lark, 449 



"toad," 415 

 Hornet, 250 

 Horn worm, 256 

 Horny jaws, 358 

 Horse, 487 



botfly, 259 



evolution, 617, 618, 619, 620 



hair worm, 160 



roundworm, 154 



syphilis, 74 

 Horseshoe crab, 273, 274 

 Host, 636 



and donor tissues, 568 

 Hour-glass spider, 276 

 House mouse, 485 



rat, 485 



spider, 272 

 Housefly, 257, 265 

 Household insect pests, 260 

 Howler, 489 



Human being, 325, 485, 489, 495 

 (see Man) 



Human (Cont.) : 



blood groups, 527 



embryo, 477, 478 



hair, 473 



itch mite, 275 



skeleton, 500 

 Humerus, 343, 346, 437, 438, 501 

 Humming birds, 449, 453, 455, 



462 

 Humpback whale, 486 

 Hunger, 547 



Huntington's chorea, 596 

 Hyalonema, 101 

 Hyalospongiae, 101 

 Hybridization, 581 

 Hydatid cyst, 146 



Hydra, 103-117, 104, 106, 10^, 

 110,113,125,127,607 



behavior, 113-114 



budding, 1 1 5 



cell types, 108 



development, 116 



differentiation, body regions, 

 111 



digestion, 112 



embryology, 115 



excretion, 113 



grafting, 117 



histology, 105 



locomotion, 113, 114 



mesoglea, 116 



metagenesis, 118 



morphology, 103 



muscular system, 107 



nematocysts, 106, 107, 109, 110 



nervous system, 108 



nutrition, 112 



physiology, 112 



regeneration, 116 



reproduction, 103-105, 104, 

 114, 115 

 asexual, 103, 104 

 sexual, 103. 104,115 



respiration, 113 



response to stimuli, 109 



spermatogenesis, 115 



stomach-reproductive and stalk 

 region. 111 

 Hydrachna, 279 

 Hydrachnidae, 279 

 Hydranth, 118, 119 

 Hydrax, 496 

 Hydrocaulus, 118 

 Hydroid polyp, 125 

 Hydrolysis, 519 

 Hydrophiidae, 407 

 Hydrophilidae, 264 

 Hydrorhiza, 1 1 8 

 Hydrostatic organ, fish, 383 

 Hydrotheca, 118, 119 

 Hydrozoa, 103, 127 

 Hyena, 464, 496 

 Hyla, 402, 403 

 Hylidae, 397 



