580 



INDEX 



Python, 396, 553 



Quail, 423 

 Queen bee, 227 



Rabbits, 448, 459, 556 



Raccoons, 436 



Radial symmetry, 135, 289 



Radioactivity, 40 



Rats, 447 



Rattlesnakes, 392 



Rays, 369 



Recapitulation theory, 289 



Recessive genes, 505 



Red blood cells, 60 



Red spider, 205 



Red tide, 95 



Red wasps, 261 



Reflex action, 322, 325 



Regeneration, 113 



crayfish, 193 



earthworm, 176 



hydra, 122 



planaria, 145 



scypha, 113 



starfish, 294 

 Reproduction, 13, 69 



amoeba, 88 



birds, 408 



fishes, 374 



hydra, 122 



insect, 223 



Paramecium, 104 



scypha, 111 



starfish, 293 

 Reproductive system, 72 



ascaris, 157 



clam, 275 



crayfish, 192 



earthworm, 175 



embryology, 534 



frog, 352 



man, 352 



planaria, 141 

 Reptiles, 382 

 Research, scientific, 2, 8 

 Respiration, 65 



amoeba, 88 



ascaris, 156 



cellular, 10, 65 



earthworm, 169 



hydra, 122 



Paramecium, 104 



planaria, 139 



scypha, 110 

 Respiratory system, 71 



clam, 274 



crayfish, 189 



embryology, 531 



frog, 334 



man, 335 



starfish, 290 

 Rh factor, 345 

 Rhinoceros, 441 

 Ribbon snakes, 397 

 Roaches, 244 

 Robber flies, 256 

 Robin, 76 

 Rodents, 446 

 Rotifera, 264 

 Roundworms, 154 

 Ruminant stomach, 442 



Salamanders, 380 

 Salk vaccine, 7 

 Salmon, 376 

 Sand crab, 194 

 Sand dollars, 295 

 Sand flies, 96, 258 

 Sarcodina, 85 

 Scale insects, 252 

 Scaphopoda, 286 

 Schleiden, 18 

 Schwann, 18 

 Science, divisions, 9 

 Science, nature of, 2 

 Scientific attitude, 7 

 Scientific method, 2 

 Scientific names, 77 

 Scolex, 147 

 Scorpion, 203 

 Scorpion flies, 253 

 Scypha, 109 

 Scyphozoa, 128 

 Sea anemone, 129 

 Sea cow, 446 

 Sea cucumbers, 296 

 Sea horse, 375 

 Sea lilies, 297 

 Sea lions, 440 



