INDEX 



Roesle, reaction to induction shocks in infu- 

 soria, 82, 151. 



Rolling movement in Amoeba, 2. 



Romanes, localization in medusa, 200; reac- 

 tion of parts of medusae, 227; nervous 

 conduction in medusas, 228, 229; behav- 

 ior of starfish, 241. 



Rothert, reactions of bacteria, 31, 32, 37; 

 reaction method in flagellates, 121; kine- 

 sis, 275. 



Rotifera, avoiding reaction, 236; reactions 

 to stimuli, 242. 



Roux, polarizing effect of electric current, 

 167. 



Sagartia, reaction to gravity, 196, 210; to 

 local stimulation, 199; finding food, 222; 

 taking indifferent bodies, 224; reactions 

 of separate tencacles, 227. 



Saprolegnia, swarm spores, reaction method, 

 121. 



Schwarz, reaction to centrifugal force, 150. 



Sea anemones, nervous system, 189; loco- 

 motion, 191; effects of hunger, 191; 

 righting reaction, 195; reaction to grav- 

 ity, 195, 210; attachment to crab, 197; 

 localized reactions, 199; rejecting reac- 

 tion, 202; direction of movement, 206; 

 setting of reaction by repetition, 206; 

 acclimatization to stimuli, 207; food 

 habits, 221; part played by cilia, 222. 



Sea urchin, reflexes, 234; reaction by varied 

 movement, 238; dependence of behavior 

 on physiological states, 252; modifiability 

 of behavior, 252. 



Selection of conditions resulting from varied 

 movements, Amoeba, 22; bacteria, 40; 

 Paramccium, 79, 108; flagellates, 112; 

 ciliates, 115; ccelenterates, 230; in in- 

 vertebrata in general, 238; rotifers, 242; 

 flatworms, 246; in Protozoa and Metazoa, 

 263; production of regulation, 339, 342; 

 general, 302. 



Sensitiveness of different parts of body, in 

 infusoria, 59, 82, 117, 133, 136; compari- 

 son with sense organ, 262. 



Simultaneous stimuli, effect on infusoria, 92, 

 1 80. 



Sleep, 331. 



Smith, behavior of earthworm, 247, 254. 



Solids, reaction to, Amoeba, 6; bacteria, 27, 

 37; Paramecium, 51, 54, 59-62; other 

 infusoria, 117; interference with other 

 reactions, 92-96, 119. 



Sosnowski, reactions of infusoria to gravity, 



77, 96- 



Spaulding, association and habit formation 

 in hermit crabs, 257; reflex, 282. 



Spectrum, behavior of bacteria in, 36 ; of Eu- 

 glena, 140. 



Spencer, selection of overproduced move- 

 ments, 302, 327. 



Spermatozoids of fern, reaction method, 121; 

 Weber's law, 123. 



Spiral movement, bacteria, 27; Paramecium, 

 44, 46, 58; other infusoria, no; flagel- 

 lates, in; swarm spores, 143; effect on 

 relation to light, 133, 138. 



Spirillum, behavior, 27-29, 33, 34. 



Spirostomum, avoiding reaction, 114; at- 

 tachment by mucus, 116, 118; relation 

 to gravity, 149; reaction to induction 

 shocks, 151; to constant current, 157. 



Spontaneous activity, in Protozoa and Meta- 

 zoa, 261; in ccelenterates, 189; general, 

 283; spontaneous collections of infusoria, 

 68, 122. 



Starfish, reflexes, 236; variable reactions, 

 2 39! righting reaction, 238; setting of 

 reaction by repetition, 241. 



Statkewitsch, reaction of Paramecium to 

 water current, 75; reaction to induction 

 shocks, 81, 83, 88, 151; to constant cur- 

 rent, 84; to alternating currents, 87; 

 quieting infusoria, 81, 83; discharge of 

 trichocysts, 90, 104; cataphoric action, 

 165; cause of reaction to electric current, 

 167. 



Stentor, avoiding reaction, 113; attached 

 Stentors, 116; reaction to light, 128, 142; 

 behavior when attached, 171; modifica- 

 tion of reactions, 171-179, 333; tube 

 formation, 176; choice of food, 183; 

 relation of behavior to reflexes, 279; 

 changes in physiological state, 287; laws 

 of change, 290. 



Stimuli, 6, 293. 



Stoichactis, rejecting reaction, 201 ; reaction 

 to gravity, 211; food reactions, 223-226. 



Strasburger, reaction method in swarm spores, 

 113; reaction of swarm spores to light, 

 143; experiments with prism, 145; ter- 

 minology, 275. 



Stylonychia, avoiding reaction, 114; creep- 

 ing on surface, 118; reaction to electric 

 current, 154; food habits, 184. 



Subjective states, 328, 331. 



Summation of stimuli in Protozoa, 83, 263. 



Surface tension, currents due to, 4. 



Swarm spores, reaction method, 113; reac- 

 tion to light, 142, 143. 



Temperature reactions, Amoeba, 10; bacteria, 

 37, Paramecium, 51, 54, 55, 70; other infu- 

 soria, 124; interference with temperature 

 reactions, 93; optimum in infusoria, 127; 

 reaction in Hydra, 204; in flatworm, 243. 



Tentacles, stimulation of, Hydra, 198; sea 

 anemones, 199; medusae, 200; methods 

 of contraction and bending, 198, 199; 

 movements in medusae, 220; in sea anem- 

 ones, 222; behavior of separated tenta- 

 cles, 227. 



Terms employed in animal behavior, 274. 



