INDEX 



483 



Egg, Nereis, 240 



starfish, 240 

 Elasmobranchii, 447 

 Electric organ, 331, 332 



ray, 447 

 Electroplax, 331 

 Eleidin, 47 

 Embryo, chick, 259 



frog, 252 



human, 295 



shark, 162 

 Enamel, 89 

 Enchytraeus, 418 

 Endamoeba, 370 

 Endemic goiter, 211 

 Endocrines, 205 

 Endoderm, 248, 253 

 Endolymph, 200 

 Endomixis, 282, 383 

 Endoskeleton, 54 

 Endothelium, 121 

 Ensiform process, 68 

 Entelechy, 12 

 Enterokinase, 106 

 Enteropneusta, 440 

 Environment, 288, 359 

 Enzymes, 105, 106 



coagulating, 107 



diastatic, 106 



digestive, 106 



inverting, 107 



lipolytic, 107 



proteolytic, 106 

 Eoanthropus dawsoni, 307 

 Eohippus, 304 

 Eosinophile, 138 

 Epargyreus, 431 

 Ephemera, 429 

 Ephemeroptera, 428 

 Epidermis, 42, 43 

 Epinephrine, 213 

 Episternum, 67 

 Epithelium, 42 

 Epizoanthus, 397 

 Equilibration, 203 

 Equus, 305 

 Erepsin, 106 

 Eretmochelys, 452 



Ergosterol, 111 

 Erythrocyte, 137 

 Erythrodextrin, 111 

 Esophageal glands, 32 

 Esophagus, 94-96 

 Eubranchipus, 421 

 Euciliata, 381 

 Eucypris, 422 

 Eugenics, 287-289 

 Euglena, 368, 369 



eyespot in, 353 

 Eupagurus, symbiosis of, 346, 347 

 Euplanaria, 86, 400 

 Euplectella, 388 

 Eurycea, 450 

 Eustachian tube, 29 

 Eutheria, 455 

 Evolution, 3, 21, 290 



horse, 304, 305 



man, 306 

 Excretion, 144 

 Exhormone, 110 

 Extensor cruris muscle, 83 

 External ear, 202 

 External iliac vein, 130 

 Extracellular digestion, 85 

 Eye, 257 



accommodation of, 196 



compound, 192 



development of, 257 



human, 193, 194 



muscles of, 197 



Planaria, 192 

 Eyespot, 368 



F 



Facial nerve, 179 

 Factor, 263 

 Fangs, 330 

 Fasciola, 402, 403 

 Fat, 7, 118 

 Fat body, 160 

 Feathers, 48 

 Feather stars, 437 

 Feeble-minded, 288 

 Feint, 338, 339 

 Felichthys, 356 



