530 



INDEX 



319, 335, 336, 341, 342, 386, 387, 

 390-394, 396, 407, 416, 420, 453, 

 477, 479; See: Amoeba and Para- 

 mecium 



Protozoology, 46, 393; See: Protozoa 



Pseudopodium, 10, 35, 48 



Psychology, 4, 5, 423 



Psychozoic era, 359 



Pterodactyl, 120 



Ptyalin, 152, 156 



Pubis, 140, 142 



Public health, 6, 339, 389-403 



Pulmonary circulation, 173-176 



Pulvillus, 332, 333 



Pupa, 97, 392, 406, 407, 410, 412 



Pupil, 215, 217 



Pure line, 380-382 



Pure science, 386, 388 



Purity of gametes, 302 ; See: Segrega- 

 tion 



Purpose in Nature, 385 



Putrefaction, 21; See: Decay 



Pyloric, caeca, 84; sac, 84; valve, 153 



Pylorus, 155 



Pyramids, 49 



Python, 123, 357 



Quahaug, 88 

 Queen bee, 329, 330 

 Quinine, 396 



Rabbit, 129, 372 

 Rabies, 343, 390 

 Radial, canal, 72, 74; symmetry, 71, 



IS, 99 

 Radio, 210 

 Radiolaria, 49 

 Radius, 142, 144, 355 

 Radula, 87 



Ramapithecus, 430, 431 

 Rana, See: Frog 

 Rat, 129, 367, 401, 402, 407 

 Ratitae, 124 

 Rattlesnake, 123, 358 

 Ray, 113, 114 

 Ray, John, 456 

 Reason, 347 

 Reaumur, 460 

 Recapitulation theory, 96, 364-366, 



468 

 Receptaculum chyli, 158 

 Receptor, See: Sense organ 

 Receptor-effector system, 199 



Recessive character, 290-297, 383 

 Recombination, 287, 288, 314, 315, 



380-384 

 Rectum, 152, 268 

 Redi, 219, 220, 453 

 Redia, 397, 398 

 Reduction of chromosomes, 244, 245, 



247, 305; .See: Maturation 

 Reed, 393 

 Reef, 77 

 Reflex action, 201, 207, 208, 346, 



347 

 Regeneration, 67, 118, 233, 235-237 

 Rejuvenation, 256-260 

 Relapsing fever, 391 

 Renaissance science, 349, 449-451 

 Renal, artery, 171, 185, 186; portal 



system, 171-173; vein, 171, 185, 



186 

 Rennin, 153, 156 

 Reorganization, 229 

 Repair, 10; -See: Regeneration 

 Reproduction, 12, 26, 57, 65, 184, 



188-195, 229-258, 262; power of, 



375 

 Reproductive organs, 184; See: Re- 

 production 

 Reptile, 111, 120-123, 204, 359, 360, 



367, 430 

 Research, 383, 386, 387, 394, 402- 



404, 417, 423-425 

 Resorption, 271 

 Respiration, 33, 34, 37, 134, 145, 161- 



167, 181, 461, 463 

 Respiratory center, 165, 205; inter- 

 change, 165, 166; mechanism, 164, 



165 

 Resting cell, 240 

 Retina, 213-2*6" 

 Reversion, 287 

 Rhagon, 69, 70 

 Rhinoceros, 130 

 Rib, 133, 142, 144, 164 

 Rickets, 160 

 Roan cattle, 298 

 Rodentia, 129, 352, 353 

 Rods and cones, 216, 217 

 Roman science, 448, 449 

 Roosevelt, 418 

 Ross, 392 



Rotifer, 82, 83, 260, 477 

 Roundworm, 79, 80, 260, 400, 401 

 Rye, 409 



