INDEX 



825 



Enzymes, 32. 199. 397 



Eoanthropus. 772 



Eohippus. 785 



Eosinophils. 202, 205. 207 



Ephemeroptera, 593 



Epidermis. 127, 128, 129. 132. 157 



frog. 691, 692 



human, 310 



hydra. 437 



Malpighian layer. 127, 128 



plant. 60, 61, 62 



reptiles, 7 13 

 Epididymis, 341, 342 

 Epiglottis, 181, 182, 206, 236. 237, 240, 



241 

 Epinephrine. 265 

 Epistylis. 428. 448 



Epithelial tissue. 107. 108, 109, 110. Ill 

 Equilibrium, 314-316, 320 

 Erepsin, 187, 696 

 Eryops, 682 

 Erythrocytes, 200, 202, 207, 211 



development of, 205 



frog, 698 



relative sizes, 201 

 Esophagus, 182-184, 206 

 Estrogen, 271, 276, 277, 344, 348, 350, 



351, 384 

 Estrus. 276 

 Estrus cycle, 348-350 

 Eubranchipus, 587 

 Eudorina, 429 

 Eugenics, 418, 419 



Euglena, 426, 428, 429, 430, 432, 433, 797 

 Eunuch, 344, 407 

 Eustachian tubes. 235. 319, 375 

 Evolution, 664, 777-794 



convergent, 756. 782. 783 



organic and social, 787 



theories, 788-792 

 Excretion, 4, 242-254 

 Excretory organs, 242-254 



bladder, 251 



flame cells, 243, 244 



gills, 252 



kidneys, 243-247, 248, 249, 253 



lungs, 252 



nephridium, 243 



ureters. 251 



vacuoles. 243 

 Excretory system, 242-254 



Ascaris. 522 



bird, 743, 744 



crayfish. 245, 582 



earthworm, 245, 561 



frog, 703, 709 



insect, 245, 608, 609 



moUusk, 639 



planaria, 503 



reptile, 723 



starfish, 660 



Exoskeletons, 136-138. 141, 578 

 Experimental method, illustration of. 259 

 Eyeball, 326, 327 

 Eyes, compound. 323, 584, 601, 602, 611 



development of, 374 



farsighted, 330 



frog. 708 



simple, 601, 602, 624 



snail. 643 



squid. 648 

 Eyesight of birds, 747, 748 



Fairy shrimp, 587 

 Fallopian tubes, 344 

 Family, 104, 795 

 Fangs, poison, 721, 722 

 Farsighted eye, 330 

 Fasciola hepatica, 509 



life history of. 510 

 Fasciolopsis buski, 512, 513 



life history of, 512 

 Fat body. 688, 689. 697, 709, 711 

 Fats. 30-33, 168-170. 188. 190. 198. 199 

 Feathers, 126, 129, 130. 729-734, 799 



types, 733 

 Feeding devices, 175. 176, 177 

 Feet of birds. 736. 737, 738 

 Femur. 143, 148, 150, 693, 725, 739 

 Fertilization, 40, 47, 54, 65, 335, 337. 339. 

 346. 351. 353. 361, 380, 381. 404 



cross-. 338, 390, 393 



guinea pig, 363 



membrane, 338, 361, 367 

 Fibrillae, 36 



Fibrin threads. 211, 212 

 Fibrinogen. 212 

 Fibula. 148, 150, 152, 725 

 Filariae. 528 

 Filariasis, 100, 529 

 Filoplume, 733 

 Filum terminale, 705 

 Fishes. 667-680 



airbladder and sounds, 674-676 



embryo, 377 



eyes, 677, 678 



hearing. 678 



internal structures. 673 



skin and scales. 669 



spawning habits. 677 



taste and smell. 679 



(See also specific fish) 

 Flagella, 36, 244, 430, 432, 457, 460 

 Flame cells, 503, 537. 538. 541 

 Flatworms, 100, 498-518, 663 

 Flea, 97, 98 

 Flight. 740. 741 

 Floscularia, 538, 541 

 Flukes, 508-513, 797 



blood, 511, 512 



