INDEX 



2,^5 



Lyon, reaction to currents, 74; to gravity, 

 77; to centrifugal force, 78. 



Manubrium, localizing reactions, 200; food 

 reactions, 220; independent reactions, 

 227. 



Massart, reactions of bacteria, 34, 37; dis- 

 charge of trichocysts, 90; interference of 

 heat and contact reactions, 93; reaction 

 of Polytoma, 123; reversal of reaction to 

 gravity by heat, 150; nomenclature, 275. 



Mast, reactions of bacteria, 37; local stimu- 

 lation with heat, 198; behavior of Hydra, 

 203, 205 ; reaction of flatworm to heat, 245. 



Maupas, food habits of infusoria, 182, 186. 



Mechanical stimulation, in Amceba, 6; in 

 bacteria, 27, 37; in Paramecium, 51, 54, 

 59; in other infusoria, 117; in Hydra, 

 204; in medusEe, 220; interference with 

 other stimuli in infusoria, 92-96. 



MedusEe, nervous system, 189; rhythmical 

 contractions, 191, 227; food habits, 192, 

 219; reaction to local stimulation, 199, 

 200; reaction to electric current, 210; 

 to gravity, 211; to light, 214; to chemi- 

 cals, 220; behavior of separated pieces, 

 227; relation of behavior to tropism the- 

 ory, 272. 



Memory, 333. 



Mendelssohn, temperature reactions, 70; 

 optimum for infusoria, 127; change of 

 optimum, loi. 



Metabolism, relation of behavior to, in bac- 

 teria, 36, 39; in Coelenterata, 231; in 

 invertebrates in general, 251; relation to 

 movement, 284; relation to changes in 

 physiological state, 286, 287; relation to 

 positive reactions, 295; general, 299, 

 340, 341- 



Metazoa and Protozoa, 188; comparison of 

 behavior, 260-264. 



Metridium, movement from internal causes, 

 191; relation to gravity, 211; food reac- 

 tions, 222, 224, 225; fatigue, 226; reac- 

 tions of separated tentacles, 227. 



Microthorax, avoiding reaction, 115. 



Miyoshi, reactions of bacteria, 32. 



Modifiability of behavior. Amoeba, 24; bac- 

 teria, 39; Paramecium, 100; Stentor, 

 170; sea anemones, 206, 207, 226; Coe- 

 lenterata, 231, 232; invertebrates, 237, 

 250; Convoluta (flatworm), 255; Crus- 

 tacea, 255-257; higher invertebrates, 

 258; general, 258, 317; laws of, 286-291; 

 modifiability in colloids, 317. 



Moebius, behavior of Nassa, 247. 



MoUusks, trial movements, 247. 



Monas, reaction to light, 36. 



Moore, reactions of infusoria to gravity, 77, 

 96; lack of food, loi. 



Morgan, C. L., trial and error in higher ani- 

 mals, 250. 



Morgan, T. H., variability in regeneration, 



348. 

 Motile touch, reaction of Gonionemus to, 



221, 230. 

 Movement spontaneous, 283; cause of, 



284, 285. 

 Myxomycetes, reaction to light, 12. 



Naegeli, movement and reactions of flagel- 

 lates, III, 113; spiral movement in swarm 

 spores, 143. 



Nagel, food reactions in sea anemones, 224. 



Nassa, behavior in finding food, 247. 



Natural selection, 320; relation to individ- 

 ual selection or intelligence, 324, 325, 345; 

 part played in behavior, 327. 



Negative reaction, in Amceba, 6, 23; in 

 bacteria, 27, 28; in infusoria, 53, 117; 

 general, 301. 



Nematocysts, action in food taking, 218. 



Nervous system, of Coelenterata, 189; con- 

 duction by, in ccelenterates, 228; func- 

 tion in ccelenterates, 230; specific prop- 

 erties and general functions, 260-264; 

 behavior without a nervous system, 261. 



Nomenclature, 274-276. 



Nucleus, in Amceba, 2; in Paramecium, 43. 



Nutritive processes, relation of behavior to, 

 see metabolism. 



Nyctotherus, avoiding reaction, 114; reac- 

 tion to chemicals, 122. 



Oltmanns, terminology, 275. 

 Opalina, avoiding reaction, 114; reaction to 

 chemicals, 122; to electric current, 156, 



159- 



Ophidomonas, reaction to light, 36. 



Ophryoglena, lack of reaction to gravity, 150. 



Optimum, in bacteria, 31; Paramecium, 

 56, 66; for temperature, 71, 127; change 

 of optimum, loi; optimum in other in- 

 fusoria, 123, 127; optimum in light reac- 

 tions, 141, 148; general, 295. 



Organic selection, 321. 



Orientation, Amoeba, 22, 269; Paramecium, 

 73 (by exclusion, 72); relation between 

 orientation reactions and others in infuso- 

 ria, 78; no position of symmetry in infu- 

 soria, 79; orientation by exclusion in 

 Oxytricha, 126; orientation to light, 134, 

 138-140; to electric current, 153, 163; 

 in rotifera, 242; orientation to light in 

 earthworm, 247, 248; in blowfly larva, 

 249; fundamental feature in tropism, 

 264; how brought about, 267. 



Oscillaria, as food for Amceba, 19. 



Osmotic pressure, reaction to, in bacteria, 

 34; in Paramecium, 63; in other infuso- 

 ria, 124. 



Ostwald, chemical processes in organisms, 

 346- 



Oxygen, reaction to, bacteria, 28-31, 39, 341; 



