INDEX 



573 



motion of, 167, 168; reproduction 

 and life cycle of, 171, 172; struc- 

 ture of, 166, 167. 



Euglenoid, movements, 166, 167, 168; 

 see also Euglena. 



Euglenoidina, 166. 



Eumeces, 425. 



Euplotes, 176, 190, 315. 



Eustachian tubes, 4.3, 46. 



Evidence for Organic Evolution, 

 from animal domestication, 523; 

 from classification, 506; from 

 comparative anatomy, 498, 4C9, 

 500, 501, 530; from comparative 

 embryology, 498, 503, 531; from 

 geographical distribution, 519; 

 from geological distribution, 507, 

 535; from physiology, 522, 533. 



Evolution, 6, 489, 494; evidence for, 

 497; human, 528; see also Organic 

 Evolution. 



Excretion, in Hydra, 261; in Proto- 

 zoa, 162, 184; in vertebrates, 94; 

 summarj', 96. 



Excretions, 54, 94. 



Excretory system, of earthworm, 295; 

 of locust, 357; of vertebrates, 51. 



Exopodite, 326. 



Experimental breeding, 457, 462. 



Experimental embryology, 457, 483. 



Experimental evolution, 526. 



External features, of craj'fish, 322; of 

 earthworm, 283; of Hydra, 247; 

 of locust, 344; of vertebrates, 38. 



Extra-embryonic coelome, 431. 



Eye-spot, of Euglena, 166, 167. 



Eyes, of Arthropoda, 362; of craj^h, 

 322,362; of locust, 348, 361. 



Factors, Mendelian, 474; see also 



Genes. 

 Faeces, 85, 285. 

 Fairy Shrimps, 334, 336. 

 Family tree, of animal life, 239; of 



Primates, 529. 

 Fat-body, 47, 353. 

 Fats, 73, 135; absorption of, 88, 89; 



digestion of, 83, 85; storage of, 91. 



Fatty acids, 73. 



Faults, geologic, 510. 



Fauna, 522. 



Feeding habits, of frog, 17, 31; of 

 Hydra, 263. 



Fertihzation, 55, 232; in frog, 403; 

 membrane, 232; in Protozoa, 173; 

 in Toxopneustes, 233. 



Fibrin, 74, 146. 



Filial regression, 459. 



Filum terminale, 66. 



Fins, 39. 



Fish moth, 372. 



Fishes, climbing, 27; development 

 of, 37, 420; environment of, 27. 



Fission, binary, 219; see also Cell 

 division in protozoa. 



Flagellate, see Euglena. 



Flagellum, 154, 166, 168. 



Flatworms, see Platyhelminthes. 



Flea, 375. 



Flounder, 498. 



Fluctuation, 461, 486, 559, 560. 



Flukes, 22. 



FcEtus, 434, 452. 



FoUicle ceUs, of frog, 400. 



Food, 76, 77. 



Food relations of organisms, 351, 382, 

 388, 395, 550. 



Food vacuoles, 156, 171, 178. 



Foraminifera, 164, 165. 



Fore brain, of frog, 416; see also 

 Telencephalon and Diencephalon. 



Fossils, 5, 507, 535; representative 

 records of, 502, 503, 504, 505, 510; 

 of reptiles, 506, 508, 509. 



Frog, adaptations of, 24; arterial 

 sj'stem of, 57; breeding habits of, 

 400; circulatory sj^stem of, 56, 

 90; classification, 12, 37; develop- 

 ment of, 23, 400; digestive tract 

 of, 43, 47, 51; distribution of, 14; 

 enemies and parasites of, 22; food 

 and feeding of, 17; hfe cycle of, 23; 

 metamorphosis and juvenile stages 

 23, 24, 419; movements and loco- 

 motion of, 18; nervous system of 

 64; reproductive organs of, 47, 54, 



