INDEX 



361 



rents in reaction to electricity, 85; reac- 

 tion to water currents in Paramecium, 73. 



Cutleria swarm spores, reaction to light, 142, 

 146. 



Cyclidium, collection in acids, 122. 



Cysts of Euglena, as food for Amoeba, 12. 



Daily life of Paramecium, ro4. 



Dale, reaction of infusoria to water currents, 

 75; to chemicals, 122. 



Davenport, reaction of Amoeba to light, 11, 

 21; of Paramecium to gravity, 76; of in- 

 fusoria to chemicals, 122; diagram of 

 tropism theory, 268; terminology, 275. 



Desire, 331. 



Development of behavior, 314-327. 



Didinium, food habits, gr, 185; discharge of 

 trichocysts, 186. 



Discrimination, 304, 315, 329. 



Driesch, chain reflexes, 251; tropism theory, 

 266; reflex, 278; vitalism, 338. 



Driving Amceba, 6. 



Drying, reaction to, in flatworm, 243. 



Earthworm, testing movements, 247; reac- 

 tion to light, 248. 



Echinoderms, behavior, 234, 238; relation 

 to tropism theory, 272. 



Ectosarc, 2, 43; contraction in Paramecium, 89. 



Electricity, reaction to, in Amoeba, 12, 23, 24; 

 in bacteria, 37; in Paramecium, 51, 80 

 (induction shocks, 81 ; alternating cur- 

 rents, 83, 87; constant current, &^\ inter- 

 ference with reaction to electricity, 94, 96, 

 119); in other infusoria, 151 (induction 

 shocks, 151; constant current, 152); 

 lack of reaction in Euglena, 152; reaction 

 in Colpidium, 155; in Spirostomum, 157; 

 in Opalina, 159; summary on infusoria, 

 163; theories, 164; reaction in coelen- 

 terates, 208; in rotifers, 242; agreement 

 with tropism theory in infusoria, 27r. 



Elemental life, 260. 



Endosarc, -2^ 43. 



Engelmann, reaction of Pelomyxa to light. 

 It; behavior of bacteria, 30, 35, 36, 39; 

 reaction of Euglena to shading parts of 

 body, 136; reaction to light in Parame- 

 cium bursaria, 142; terminology, 275. 



Epistylis, reaction to ultra-violet light, 142; 

 cessation of reaction to weak stimuli, 172. 



Ether, collection of bacteria in, 33. 



Euglena, structure and reactions, 102, 134; 

 reactions to light, 134, 294; spiral path, 

 r38; reaction to gravity, 149; to centrifu- 

 gal force, 150; no reaction to electric 

 current, 152. 



Exploratory movements, in Lacrymaria, 181; 

 in Hydra, 189, 204; in medusee, 220; in 

 sea anemones, 222; in Planaria, 243- 

 245; in other invertebrates, 246-250 

 (see trial movements). 



Famintzin, reaction of flagellates to light, 

 140. 



Fatigue, in infusoria, 100, 172; general, 331. 



Fear, 332. 



Fern spermatozoids, reaction method, 121; 

 Weber's law, 123. 



Final causes, 344. 



"Fishing" in Gonionemus, 192, 2ir, 214. 



Fission, behavior during, 102. 



Flagella, in bacteria, 26; in infusoria, 41, 60, 

 III. 



Flagellata, 41; movements and reactions, 

 in; reactions to electricity, 119, 152. 



Flatworm, localization of reactions, 236; 

 testing movements, 243; righting reac- 

 tion, 245; physiological states, 253; 

 habit formation, 254. 



Food, behavior in obtaining. Amoeba, 12- 

 19, 24, 25; Paramecium, 46, 183; Sten- 

 tor, 171; in other infusoria, 118, 1S2; 

 Gonionemus, 192, 219; in coelenterates 

 in general, 216; Hydra, 216; medusas, 

 219; sea anemones, 221; sea urchin, 

 235; flatworm, 246; mollusk (Nassa), 

 247; food habits in general, 331; lack of 

 food, in infusoria, roi; in Hydra, 189; 

 in Cerianthus, 196; rejection of food in 

 sea anemones, 202 ; relation of food 

 reactions to reaction to light, in parasitic 

 infusoria, 142; in Hydra, 213. 



Form regulation, 348. 



Free infusoria, simplicity of behavior, 180. 



Gamble and Keeble, behavior of Convoluta, 



255- 



Garrey, kinesis, 275. 



Gonionemus, "fishing," 192; relation to 

 gravity, 211; reaction to Ught, 214; 

 food reactions, 219; chemical stimuli, 

 220; mechanical stimuli, 220; reactions 

 of separated parts, 227; adaptiveness of 

 reactions, 221, 230. 



Gravity, reaction to, in bacteria, 37; in Para- 

 mecium, 51, 75; in other ipfusoria, 150; 

 interference with, in infusoria, 96, 150; 

 reaction in coelenterates, 195, 210; in 

 hermit crabs, 2n; in Convoluta, 255; de- 

 pendence on experience in Convoluta, 

 258; general effects of gravity on organ- 

 isms, 211. 



Growth, regulation of, 348. 



Habit, 333. 



Habit formation, sea anemone (?), 207; 



starfish, 241; Convoluta (flatworm), 254; 



Crustacea, 255; retention of habit, 256. 

 Hsematococcus, reaction to light, 142, 146; 



to gravity, 149. 

 Halteria, reaction, 115. 

 Harper, behavior of earthworm, 247, 248. 

 Harrington and Leaming, reaction of Amceba 



to Hght, II, 20, 24. 



