INDEX 



577 



Gonadotropic hormone, 363 

 Gonionemus, 127, 128 

 Gordius, 164 

 Gorilla, 455, 456 

 Granddaddy longlegs, 204 

 Grasshopper, 222, 243 



meiosis, 496 

 Grasslands, 478 

 Ground beetles, 246 

 Growth, 10 

 Growth hormone, 363 

 Guinea pigs, 505 

 Gymnodinium, 95 



Hair, 426 



Hair worm, 164 



Haldane, J. B. S., 550 



Harelip, 3 



Hearing, 327 



Helminthology, 16 



Hemichordata, 304 



Hemiptera, 250 



Hemoglobin, 172 



Hemophilia, 521 



Heredity, 503 



Hermaphroditic animals, 112, 122, 



142-175 

 Herpetology, 16 

 Heterozygous, 506 

 Hippopotamus, 443 

 Hirudo, 178 

 Histology, 15 

 Hognosed snake, 398 

 Holothuroidea, 296 

 Homology, 187 

 Homoptera, 251 

 Homozygous, 505 

 Honeybee, 227, 259, 547 

 Honeybee reproduction, 500, 519 

 Hooke, Robert, 18 

 Hookworm, 159 

 Hormones, 72, 356 

 Horned lizard, 387 

 Hornets, 261 



Horse ancestors, 556, 558 

 Horse flies, 256 

 Horses, 441 



Horseshoe crab, 206, 207 

 House fly, 223, 256 

 Hummingbirds, 418 

 Hybrid sterility, 82 



Hybrid vigor, 144 

 Hyenas, 436 

 Hymenoptera, 259 

 Hypothesis, 3 



Icthyology, 16 



Iguanas, 389 

 Indigo snake, 400 

 Ingestion, 64 

 Inorganic compounds, 46 

 Insect characteristics, 212 

 Insectivora, 432 

 Insects, 210, 240 

 Insulin, 360 



Intermediate genes, 509 

 Intermedin, 362 

 Ionization of molecules, 40 

 Irritability, amoeba, 90 

 Isoptera, 245 

 Isotopes, 39 

 Itch mites, 204 



Jellyfish, 128 



Joints, bone, 308 

 June bugs, 248 



Kala-azar, 96 



Kangaroo, 431 

 Katydids, 243 

 Kidney, human, 352 

 Kidneys, 67 

 King crab, 206, 207 

 King snakes, 398 

 Koala "bear," 431 



Lactogenic hormone, 364 

 Lagomorpha, 448 

 Lamarck, Jean, 490 

 Lamprey eel, 366, 461, 552 

 Langerhans, isles of, 360 

 Larder beetles, 247 

 Larva, 215 

 Leeches, 178 



Leeuwenhoek, Anton, 490 

 Lemurs, 451, 453 

 Leopards, 435 

 Lepidoptera, 254 

 Leucocytes, 340 

 Lice, 249 



Life, nature of, 10 

 Life processes, 64 



