718 



INDEX 



Relation (Cont): 



of human reproduction organs 

 to urinary bladder and 

 urethra, 342 

 between protozoans and 



sponges, 605 

 between vertebrates and inverte- 

 brates, 604 

 Relative size of blue whale, man, 

 and African elephant, 487 

 influences of heredity and en- 

 vironment, 599 

 Relaxin, 554 

 Remora, 393, 395 

 Renal arteries, 338, 532, 533, 

 539 

 corpuscle, 339, 539 

 portal system, 371 

 portal veins, 338 

 veins, 337, 338, 341, 342, 532, 

 533, 539 

 Reproduction, asexual, 79, 558 

 binary fission, 62, 558 

 budding, 559 

 conjugation, 61-64 

 ducts and glands, 564 

 egg-laying, 564 

 fertilization, 564 

 fission, 558 

 metagenesis, 563 

 neoteny, 561 

 oogenesis, 563 

 paedogenesis, 561 

 parthenogenesis, 165, 311, 560, 



561 

 sexual, 79, 560 

 spermatogenesis, 563 

 Reproductive system, 5, 88, 558- 

 571 

 Amoeba, 37 

 amphioxus, 320 

 Ascaris, 150, 151, 152 

 Aurellia, 122 

 bird, 442 

 cat, 472 

 clam, 288 

 Coelenterata, 117 

 crayfish, 211, 212 

 dogfish shark, 373, 374 

 earthworm, 180, 182 

 Euglena, 44, 45 

 fish, 385 

 frog, 340 

 Hydra, 103-105, 104, 111, 114, 



115 

 insect, 239 

 lamprey, 364 

 man, 341 



Metazoa, 79-84, 558 

 Paramecium, 61-64, 62, 63 

 planaria, 136, 139 

 Porifera, 97, 98 

 Scypha, 97 

 spider, 271 



Reproductive system {Cont.): 



starfish, 308 



tapeworm, 141 



turtle, 410 



Volvox, 48 

 Reptilia, 317, 325, 405-431, 616, 

 647 



age of, 617 



classification, 428 



fossil, 426 



number of species, 429 



poisonous, 422-426 



relations to man, 427-428 



relationships, 407 

 Research, experimental cell, 22 



virus, 603 

 Reservoir, 43 

 Respiration, 20, 534 



biologic, 534 



cellular, 20, 534 



external, 534 



internal, 534 

 Respiratory system, 87, 534 



amphibians, 534 



amphioxus, 319 



bird, 439, 441, 535 



cat, 469 



clam, 286, 287 



Coelenterata, 117 



crayfish, 207 



dogfish shark, 371 



earthworm, 177, 534 



fish, 383 



frog, 333 



insect, 249 



lamprey, 362 



leech, 190 



mammals, 535 



man, 536 



Metazoa, 83, 87 



Protozoa, 534 



reptiles, 535 



spider, 271 



starfish, 306 



turtle, 409 

 Respiratory trees, 310 

 Response, 109 

 Rest, 508 

 Resting cell, 25 

 Reticulitermes, 263, 639 

 Reticulum, 488 

 Retina, 231, 233, 355, 550 

 Retinoblastoma, 596 

 Retinula, 210 

 Retractile tentacle, 131 

 Retractor muscle, 284, 310 

 Retrogressive metamorphosis, 569 

 Rh blood groups, 528, 591 



factor, 528, 591 



incompatibility, 591 



inheritance, 591 



mechanism, 592 

 Rhabdites, 137 

 Rhabdocoela, 147 



Rhabdom, 209, 210 



Rhachitomi, 397 



Rhagon, 96 



Rhea, 450, 451, 461 



Rheiformes, 461 



Rhesus monkey, 488 



Rhineodon, 373 



Rhineura, 414, 430 



Rhinoceros, 487 



Rhinodrilus, 190 



Rhizomastigina, 49 



Rhizopoda, 39 



Rhodnius, 249 



Rhodopsin, 550 



Rhopalma, 168, 169 



Rhynchocephalia, 405, 407, 429 



Rhynchocoela, 163 



Rhynchotus, 461 



Rib, 436, 437, 501 



Ribbon worms, 163 



Ribbonfishes, 395 



Riboflavin, 521 



Rickets, 523 



Ring canal, 118, 120, 122, 304, 



309, 310 

 Ringhals, 424 

 River ducks, 452 

 Road runners, 453, 461 

 Robber flics, 265 



frog, 397 

 Rock barnacles, 216 



fishes, 395 

 Rock-boring mussel, 298 

 Rocky Mountain locust, 257 



spotted fever, 277 

 Rodentia, 464, 482, 496 

 Rods, eye, 550 

 Rollers,' 462 

 Rorqual, 486 

 Rose aphid, 258 

 Rostellum, 144 

 Rostrum, 200, 201, 202 

 Rotator, 349 

 Rotatoria, 164 

 Rotifera, 164, 165 

 Round dance, bee, 252 

 Roundworms, 149-162, 174 



free-living, 153 

 Rove beetle, 264 



Ruby throated humming-bird, 455 

 Ruffed grouse, 453, 461 

 Rumen, 488 

 Ruminants, 487, 488 



hollow horned, 487 

 Ruminating horse, 618, 619, 620 



Saccoglossus, 321 

 Saccule, ear, 548 

 Sacculina, 216 

 Sacral vertebra, 343 

 Sacrum, 500, 501 

 Sagitta, 168 



