INDEX 



363 



Flat worms, 174 



Fleas, 112 



Fluctuating variations, 351 



Flukes, 178 



Fly, 106, 109, 111 



Fossil reptiles, 267 



Fossils, 328 



Frogs, 255 



Galen, 7 

 Gall-fly, 117 

 Gall-gnat, 109 

 Gastropoda, 213, 216 

 Gastrula, 152, 153, 165 

 Geographic Distribution, 343 

 Germ layers, 16, 153 

 Germinal variations, 351 

 Gill arches, 224, 225 

 Gill slits, 224, 225 

 Glochidium, 218 

 Goose, 273 

 Gordiacea, 187 

 Grasshopper, 73, 76, 79 

 Grebe, 272 

 Gull, 273 

 Gyrinidae, 114 



Hagfish, 231 

 Harvey, 9 

 Hawk, 273 

 Hemiptera, 95 

 Heredity, 354, 357 

 Hermaphrodite, 150, 177, 207 

 Heterocera, 103 

 Heteromera, 116 

 Heteroptera, 98 

 Hibernation, 253 

 Hirudinea, 211 

 Holothuroidea, 201 

 Homoptera, 96 

 Hook-headed worms, 188 

 Hookworm, 186 

 Horse, 295 

 Horse-fly, 109 

 Horsehair worms, 187 

 Horses, fossil, 339 

 Huxley, 12 

 Hydra, 16, 18 



Hydrophilidae, 115 

 Hydrozoa, 163 

 Hymenoptera, 116 



Infusoria, 142 

 Insecta, 66 

 Insectivora, 291 

 Isopoda, 58, 59 

 Isoptera, 72 



Kangaroo, 291 

 Katydid, 73 

 Kidneys, 230 

 Kiwi, 271 



Lamarck, 348 



Lamellibranchiata, 217 



Lamellicornia, 115 



Lamprey, 231 



Lancelet, 228 



Law of Biogenesis, 60, 251, 255, 344 



Law of Recapitulation, 60, 251, 255, 



344 



Leech, 16, 211 

 Lemurs, 293 

 Lepidoptera, 102 

 Lice, 95 

 Life, 25 

 Life cycle, 35 

 Linnaeus, 9 

 Living substance, 28 

 Living things, 33 

 Lizard, 258, 261 

 Locust, 73, 76, 79 

 Loon, 272 

 Lumbricus, 204 



Malaria, 108, 141 

 Mammalia, 286 

 Man, 293, 294, 297 

 Manitee, 296 

 Mantis, 74 

 Mantle, 213 

 Marsupial pouch, 288 

 Marsupial ia, 290 

 Marsupium, 218 

 Mastigophora, 139 

 Maturation, 151 



