576 



INDEX 



Element, 36 

 Elephantiasis, 163 

 Elephants, 444, 545 

 Embryo, human, 301, 535 



mammal, 427 

 Embryology, 15, 523, 551 



experimental, 538 

 Embryonic membranes, 536 

 Embryogenesis of mammals, 537 

 Emulsifier, 44 

 Emulsion, 43 

 Endamoeba, 90 

 Endocrine system, 72 



man, 355 

 Endoderm, 525 

 Endoskeleton, 303 

 Enterobius, 163 

 Entomology, 16 

 Environment, response to, 11 

 Enzymes, 22 

 Ephemerida, 241 

 Epidermis, 122 

 Equilibrium, crayfish, 191 

 Erythroblastosis, 347 

 Erythrocytes, 339 

 Estrogen, 362 

 Euglena, 93 

 Evolution, 4, 541, 551 

 Excretion, 66 



amoeba, 88 



hydra, 122 



Paramecium, 104 



scypha, 110 



starfish, 290 

 Excretory system, 71 



ascaris, 157 



clam, 275 



crayfish, 189 



earthworm, 173 



embryology, 534 



frog, 349 ' 



man, 331 



planaria, 140 

 Exoskeleton, 183 

 Experiment, controlled, 5 

 Eye, human, 324, 326 



Fairy shrimp, 194 

 Fasciola hepatica, 147 

 Fatty compounds, 48 

 Feathers, 405 



Fer de lance, 396 



Fertilization, 497 



Fiddler crab, 194 



Filtration, 61 



Firefly, 223, 225, 247 



Fish tapeworm, 151 



Fishes, 367 



Fishmoth, 240 



Fission, 69 

 amoeba, 88 

 Paramecium, 104 

 planaria, 144 



Flagellum, 93, 109 



Flame cells, 140 



Flatworms, 134 



Fleas, 259 



Flesh flies, 257 



Flies, 256 



Flukes, 145 



Flying fish, 374 



Fossils, 557 



Frog embryogenesis, 527 



Frogs, 382 



Fruit flies, 258 



Gamma globulin, 7 

 Ganglion, 174, 191 

 Garter snakes, 397 

 Gastrodermis, 122 

 Gastropoda, 279 

 Gastrotricha, 265 

 Gastrula, 525 

 Gel, 45 



Gene segregation, 510 

 Genes, 21, 23, 501 

 Genetic ratios, 507 

 Genetics, 15, 503, 554 

 Geographic realms, 468 

 Germ plasm, 491 

 Giant fibers, 174 

 Giant squid, 282 

 Giardia, 96 

 Gibbon, 453 

 Gila monster, 387 

 Gill clefts, 302, 531, 552 

 Glass snake, 388, 389 

 Glochidia larvae, 275 

 Gnats, 258 

 Goiter, 358 

 Golgi bodies, 20 

 Gonad, 122 



