INDEX 



627 



Evening primroses, mutation, 550 

 Evolution, 6, 36, dUSS^ 

 evidence of, 546 

 fin to limb, 367 

 in man, 454 

 Evolutionary series, 551 

 elephant, 552 

 horse, 553 

 Excretion, 33, 37, 493-494 



(See also Excretory system) 

 Excretions, 65, 71, 135 

 Excretory pore, 160, 168, 178 

 Excretory system, 104-105, 323, 469-470, 494 

 crayfish, 259 

 earthworm, 236 

 fishes, 357-358 

 mussel, 217 

 planaria, 160, 161 

 rotifer, 189 

 spiders, 304 

 tapeworm, 170 

 threadworm, 169-170 

 vertebrates, 330-333 

 Excretory tubes, 160, 168 

 Excretory tubule, 161 

 Exoskeleton, 259, 313, 324, 465-466 

 Expiration, 33, 37, 43, 71, 467-468 



(See also Respiration) 

 External gills, 379, 468 

 External inspiration, 36, 37 

 External structure, arthropods, 310 

 birds, 403-404 

 crayfish, 255—258 

 ctenophores, 156-157 

 earthworm, 234 

 fishes, 353, 363 

 hydra, 136-137 

 insects, 276-281 

 mammals, 424 

 mussel, 212-213 

 planaria, 159 

 reptiles, 386 

 spiders, 302-303 

 sponges, 130 

 starfishes, 195-196 

 Exteroceptors, 473 

 Extra digits, inheritance, 565 

 Extracellular digestion, 140 

 Extra-embryonic coelom, 384, 444 

 Eyeball, 338 



Eyelids, 368, 370, 375, 391, 424, 547 

 Eyes, 187, 222, 248, 338-339, 368 

 amphibia, 375 

 annelids, 252 

 birds, 408-409 

 compound, 276, 261 

 crayfish, 256, 260-261 

 Crustacea, 266 

 fish, 359, 363 

 insects, 276-278, 282 

 mammals, 427 

 mollusks, 222, 223, 225, 227 

 pineal, 399 

 reptiles, 389, 395 

 simple, 302 



Eyes, spider, 303 



squid, 226 



stalked, 256 



tunicates, 318 

 Eyespots, 187, 247, 252, 321 



Fi, Fz, etc., generations, 559-561 

 Factors, 555 

 Family association, 521 

 Family name, 59, 573 

 Fangs, snakes, 398, 399 

 Fasciola hepatica, 172, 173 

 Fat body, 373 

 Fat tissue, 100 

 Fatigue, 495 

 Fats, 20, 34, 39, 482 

 Fatty acids, 35 

 Fauces, 425 



Faunal divisions, 534-537 

 Faunas, cave, 512 

 desert, 512 

 forest, 512 

 fresh-water, 512 

 island, 532-534 

 marine, 510-511, 529-530 

 stream, 512 

 terrestrial, 512 

 Fear, 501 



Feather stars, 205, 209, 211 

 Feather tracts, 406 

 Feathers, 324, 385, 404, 405, 420 

 Feces, 37 



(See also Excretions) 

 Feeble-mindedness, inheritance, 565 

 Feeding and sex determination, 566-568 

 Feet, bird, 413 

 carnivore, 435 

 even-toed ungulates, 435 

 Felidae, 573 

 Felis, 573 

 Female, 45, 106, 181, 182, 263, 266, 268, 288, 



296-299, 331, 471, 566-568 

 Femur, 277, 325, 327, 400, 404 

 Fenestra ovalis, 336, 337 

 Fenestra rotunda, 336, 337 

 Fermentation, 14, 583 

 Ferments, 14, 28, 104, 492 



(See also Enzymes) 

 FertiHzation, 46, 114-117, 476 



internal and external, 108 

 Fetal circulation, 446 

 Fetus, 478 



Fibrillar structure, protoplasm, 23 

 Fibrin, 490 

 Fibrinogen, 490 

 Fibrous tissue, 100 

 Fibula, 325, 327, 400, 404 

 Faaria, 184 



Filial generations (see F\, F2, etc.) 

 Filoplumes, 405, 406 

 Fin rays, 319, 320, 323. 367 

 Final host, 172 

 Fingers, 409 



