420 



INDEX 



Real organisms, 22 



Reciprocal, 153 



Reciprocal parasitism, 143 



Red devil, 339 



Red fox, 195 



Red horse, 300 



Red oaks, 232 



Red Sea anemone, 328 



Regurgitation, 153 



Reithrodontomys megalotis dychei 



259 

 Reproduction, 109, 151 



plant, 40 

 Reptiles, 25, 62, 72, 82, 265, 267, 268, 

 274, 290 



California prairie, 290 



carnivores, 133 



desert plains, 285 



fresh-water influents, 301 



grassland, 257, 258 



migration, 62 



mixed prairie, 265, 267 



true prairie, 274 

 Rhachianectes glaucus, 316 

 Rhamphocottus richardsoni, 331 

 Rhea, 253 



Rheotactic characteristic, 310 

 Rhizomes, 76 

 Rhizumenon, 50 

 Rhodeus, 143 

 Rhythmic migrants, 326 

 Richardson ground squirrel, 253, 264 

 Right whale, 320 

 River carp, 300 

 River climaxes, 299-305 



development, 303-305 

 Roa, 340 

 Road runner, 134 

 Robber flies, 266, 275 

 Rock fishes, 331 

 Rock oyster, 330 

 Rodents, 78 

 Role, 49 

 Rookeries, 62 

 Rooting, 84, 85 



swine, 79 

 Roots, 76 

 Root systems, 87 

 Rose beetle, 62 

 Rose star, 332 



Rotifers, 315 

 Routes of wolves, 115 

 Ruffed grouse, 123 

 Ruppia maritima, 25 

 Rutaceae, 140 

 Rutting, 47, 48 



Sage grouse, 293 

 Sagitta, 315, 319, 321 



elegans, 320 

 Salmon, 62, 199, 320, 340 



cycle, 187 



hump-back, 316 



silver, 316 



sockeye, 316 

 Salmo trutta, 320 

 Salsola, 120 



Salt-marsh caterpillars, 117 

 Salvia, 279, 288 



pitched, 273 

 Sand bottoms, 308, 311 

 Sandhill crane, 223 

 Sand turtle, 268 

 Saprobes, 165 

 Saprolegnia, 138 

 Sapsucker, 129, 220 

 Sarsia, 315 

 Scale insects, 155 

 Scalibregma, 339 



inflatum, 339 

 Scalopus aquaticus texanus, 280 

 Scaphirhj^nchus platorhynchus, 305 

 Scatology, 106 

 Scenedesmus, 140 

 Schistocerca gregaria, 205, 206 

 Sciurus kaibabensis, 124 

 Scleropogon brevifolius, 282 

 Scolopax, 197 

 Scomber, -Calanus biome, 319, 320 



scombrus, 319, 320 

 Scombresox, 319 

 Scopelid, 319 

 Scratching, 85 

 Scudderia texensis, 280 

 Sculpin, 331, 333 

 Sea anemone, 327 

 Sea cucumber, 330 

 Sea scoi"pion, 336 

 Seasonal sequence, 45 



