Index 



503 



Eeactions, see Amoeba, Bacteria, 

 Compass plant, Crustacea, 

 Daphnia, Diaptomus, Dros- 

 era, Flagellates, Fundulus, 

 Geotropism, Heliotropism, 

 Insects, Mimosa, Paramoe- 

 cium. Pigeon, Plants, Por- 

 thesia, Rheotropism, Sten- 

 tor, Tropism, Unicellular 



Realms, see Zoogeographic 



Recapitulation, 105 



Recessiveness, 258 



Recognition marks, 342 



Red cedar, distribution, 176 



Red Cross, work, 476 



Red-eyed Vireo, migration, spread, 

 182 



Red fox, distribution, 174 



Reducing division, 205-6, 215, 216 



Redwood, see Sequoia 



Reed, J. A., Senator, quoted, 422 

 W., Dr., 451 

 quoted, 452 

 ill. 451 



Reese, 88; quoted, 466 



Refractive index, see Blood serum 



Regeneration, 192-4, 480 



Reighard, 348 



Rejuvenation, see Protozoa, con- 

 jugation 



Religion, see Science 



Repair, living matter, see Metab- 

 olism 



Reproduction, asexual, 98 



characteristic of life, 282, 325, 



327 

 non-life, 282, 327 

 sexual, 98 



see Algae, Ferns, Flowers, Liver- 

 worts, Mosses, Paramoecium, 

 Protophyta, Protozoa 



Reptiles, extinct, 125 et seq. 

 extinction, 127, 136 

 spread, 154 

 see Sex cells, origin 



"Research Methods in Ecology," 

 158 



Resemblance, see Aggressive, Al- 

 luring 



Reservations, see Game 



Responses of life, of non-life, 282 



Resting bodies, animals, plants, 

 382 



Resting, see Sex cycle, daphnids 



Reversion, see Inheritance, kinds 



Rhamphorhynchus, 130; ill. 129 



Rhea, distribution, 139 



Rheotropism, roots, 308 



Rhumbler, 88 



Rhyncocephalia, invariability, 121, 

 ill. 121 

 see Tuatara 

 Ribot, quoted, 257 

 Ribs, see Abdominal Vertebrate, 



head 

 Rice, polished, see Beriberi 



rat, distribution, 178 

 Richardson, 31, 37 

 Riddle, 232 

 Ridgway, 44 



Ring -necked pheasant, 411 

 Ritter, 88, quoted, 72-3 

 Rockefeller, Foundation, 466 

 Hookworm Commission, 467 

 Institute for Medical Research, 



73, 86, 448 

 see Hookworm control 

 Rock thrush, see Sexual selection 

 Rocky Mountain goat, distribution, 



174 

 Rodents, damage, 393 et seq. 



destruction, 400, 402 

 Rose-breasted grosbeak, color, 343 

 Rotifer, 105, 381; eggs, 382 



see Sex cycle 

 Rotation of crops, see Nitrogen 



fixation 

 Ruppia, see Ditch-grass 



S 



Saber-toothed tiger, see Smilodon 

 Sahara, barrier, 254 

 Salamander, light influence, 227 



see Amblystoma, Intercrossing 

 Salmon, canning, data, 428-9 



catching, 427-8 



fecundity, 427, 430 



life history, 426-7 



migration, 156, 360-1 



propagation, 429-31 



spawning, 427 



see Sexual selection 

 Salton Sea, 76-7 

 Salvarsan 447 



Salvia, ill. 331; see Insects, rela- 

 tion to riowers 

 Sambon, 450 



Sand hopper, see Orchestia 

 San Francisco, Mountains, life 



zones, 163 et seq. 



profile, 163 



see Plague 

 Sargasso Sea, 353 

 Sargassum weed, 353 



