Acclimatization to stimuli, in Amoeba, 24; 

 in Paramecium, 52; in sea anemones, 

 207; general, 294; to heat, 101; to poisons, 

 346. 



Accommodation, see adaptiveness and regu- 

 lation. 



Acids, collection in, by Paramecium, 65, 67; 

 by other infusoria, 122. 



Actinia, taking of food when cut in two, 

 227. 



Actinians, see sea anemones. 



Action system, Paramecium, 107; of infuso- 

 ria in general, no; of Ccelenterata, 189; 

 general, 300. 



Activity, cause of, 284, 285. 



Adams, behavior of earthworm, 248. 



Adaptiveness of behavior, in Amoeba, 23; in 

 bacteria, 39; in Paramecium, 45, 79, 

 109; of changes of behavior in Stentor, 

 178; in food reactions of Gonionemus, 

 221; in ccelenterates, 230; in reactions 

 to representative stimuli, 296; general 

 factors, 299, 305, 338-350. 



Adjustment, 342 (see adaptiveness and regu- 

 lation). 



Aiptasia, reaction to local stimulation, 199; 

 setting of reaction by repetition, 206; 

 acclimatization to stimuli, 207; relation 

 to gravity, an; food reactions, 223-226; 

 rapid contraction, 228. 



Allabach, behavior of Metridium, 224. 



Allolobophora, testing movements, 247. 



Alternating electric currents, reaction to, 

 in Paramecium, 83. 



Amoeba angulata, 5; proteus, 2, 12, 13; 

 velata, 5, 8; verrucosa, 2, 18. 



Amoeba, structure, i ; movements, 2 ; behav- 

 ior and reactions, 6-25; food taking, 13- 

 19; relation of behavior to tropism 

 theory, 269; relation to reflexes, 279; 

 question of consciousness, 336. 



Amylobacter, 30, 32, 38. 



Anaerobic bacteria, 31, 341. 



Analysis of behavior, 283-313. 



Anode, movement toward, in Paramecium, 

 Si, 85, 98; in Flagcllata, 152; in Opa- 

 lina, 152, 159; in infusoria in general, 

 163. 



Antholoba, attachment to crabs, 197. 



Antitype, 277. 



Anuraea, reaction to electric current, 242. 



359 



Association, in hermit crabs, 257, 290; gen- 

 eral, 334. 



Attached infusoria, reactions, 116; complex- 

 ity of behavior, 180. 



Attention, 330. 



Authorities cited, 351. 



Avoiding reaction, in Paramecium, 47, 53; 

 adaptiveness of, 79; in Chilomonas, in; 

 in Euglena, 112; in other flagellates, 113; 

 in other ciliates, 113; in light reactions, 

 149; relation to localization, 117; relation 

 to reflexes, 279. 



Bacteria, structure, 26; movements, 26; 

 behavior and reactions, 27-40; relation 

 of behavior to tropism theory, 271; rela- 

 tion to reflexes, 278; regulation in behav- 

 ior, 341. 



Bacterium chlorinum, 37; megatherium, 34; 

 termo, 30, 32, 33, 34. 



Bain, selection of overproduced movements, 



3*, 327- 



Balantidium, reaction to chemicals, 122. 



Balbiani, behavior of conjugating Paramecia, 

 104; use of trichocysts, 186. 



Baldwin, law of dynamogenesis, 289; selec- 

 tion of overproduced movements, 302, 

 327; organic selection, 321, 326; regu- 

 lation, 349. 



Bancroft, reaction of infusoria to electricity, 

 167; of medusas to electricity, 208, 210. 



Barratt, reaction of Paramecia to chemicals, 

 64; theory of reaction to electricity (with 

 Coehn), 165. 



Bell of medusa, independent contractility, 

 228. 



Beer, Bethe, and v. Ucxkiill, terminology, 

 275; reflex and antitype, 277. 



Bethe, behavior of ants and bees, 258. 



Bibliography, 351. 



Bilateral animals, relation of behavior to 

 tropism theory, 271, 273. 



Binet, food habits of infusoria, 186. 



Birukoff, reaction of Paramecium to induc- 

 tion shocks, 83, 88. 



Blowfly larva, behavior, 249. 



Bodo, reaction to chemicals, 124. 



Bohn, behavior of hermit crabs, an, 350; of 

 Convoluta, 254; of littoral animals, 255; 

 local action theory of tropisms, 274. 



Botrydium, reactions to light, 143, 144. 



