834 



INDFX 



Pouchetia. 427 

 Pre-Cambrian era, 779 

 Pregnancy. 347, 353, 354, 383 



tests for, 383 

 Priestley, J., 57,58 

 Primates, 769, 770. 799 



family tree, 768 

 Proboscidea, 763 



Proboscis, 535, 537, 554, 663, 644, 765 

 Procoracoid, 725 

 Proctodeum, 613 

 Progesterone, 271, 276, 277, 344, 346, 



348, 350-352, 384 

 Proglottids, 513, 515, 516 

 Prognathism, 771 

 Pronephros. 244, 246 

 Prophase. 39, 40, 43 

 Proprioceptors, 166, 280, 311, 316 

 Prostate gland. 340, 343 

 Prostomium, 555. 566 

 Protective resemblance, 90 

 Proteins. 31, 32, 65, 79, 168, 169. 187- 



198, 211, 249, 257, 269, 388. 417, 



696 

 Proterospongia, 434, 435, 454, 464 

 Prothrombin. 212 

 Protons. 14, 16 

 Protoplasm, 22, 25-29. 32. 35, 77, 78, 



309, 311 

 Protozoa, 3, 71, 78, 95, 100, 227, 425- 



454, 663, 797 

 Protozoea, 575. 578 

 Protura. 593 



Proventriculus, 606. 617. 743 

 Pseudoceros montereyensis, 509 

 Pseudopodia. 430, 431, 437, 438, 440, 



443. 502 

 Pteridophyta. 796 

 Pteropods. 632 

 Ptyalin, 187 

 Pubis. 148, 150, 725 

 Pulmocutaneous arches, 701 

 Pulse, 220, 221 

 Pupae, 598 

 Purkinje cells, 217 

 Purr, 241 



Piitoriiis vison, 763 

 Pygostyle. 739 

 Pyloric valve. 184. 188. 696 

 Pylorus, 187 

 Python, 720, 721 



Quahog, 640 

 Queen bee, 614, 615 

 Quill, 733 



Rabbit, blood vessels of ears, 200, 203 



Radio-ulna, 693 



Radioactive elements. 12. 14-16. 19, 777 



Radioactive tracers, 18 



Radiolarians, 136, 426, 437, 443 



Radius, 148, 150-152, 154, 158, 725 



Raduia, 644. 645 



Rana cateshiana, 262, 264, 687 



clamitans, 690 



pipiens, 273, 276, 383, 687, 711 

 Rattlesnake, 714, 721, 722 

 Reaumur. R.. 188 



Receptor cells. 279, 280, 309-312, 315, 

 317, 320 



cold, 310 



hearing, 312, 317 



heat, 310 



light, 426. 611 



pressure, 310 



sight, 312, 321-325, 328 



smell, 311. 312. 314 



taste, 311-313, 314 



temperature, 309. 3 1 1 



touch, 309. 310 

 Recessive character. 391-393, 398, 400, 



401, 406, 407. 411, 413-418 

 Rectum, 194 

 "Red snow," 433 

 "Red tide," 434 

 Reefs, coral, 487-492 

 Reflex arc, 287, 290 

 Reflexes. 288-290, 293 



conditioned, 289, 290 



involuntary, 289, 293 



voluntary, 289. 293 

 Regeneration. 461-463, 477. 497. 498. 

 505. 506, 535, 536, 565, 585, 654, 

 720 

 Relationships, plant and animal, 52, 53 

 Renal arteries, 247-249 

 Renal capsule, 246, 248, 249 

 Renal vein, 249 

 Rennin, 185-187 

 Reproduction, 331-355 



asexual. 99. 331. 332 



plants, higher, 64 



sexual, 331, 332, 333, 338 

 Reproductive systems, ameba, 331, 440 



bird. 746, 748. 749 



crayfish. 584. 585 



ctenophore. 493. 497 



earthworm. 562-565 



fish, 676-677 



frog. 709 



human, 340-346, 355 



hydra, 331, 332, 468, 476 



insects, 61 1-612 



mollusk. 639-642, 644 



planaria, 504, 505 



ribbon worm. 537 



rotifer. 541-543 



starfish, 661 



