Index 



Spathidium, 69. 



Starfish, 186 f., 220, 248 ff. 



Statocysts, 117 ff., 181, 183, 186, 188. 



Statoliths, 128. 



Stentor, 68, 247, 249, 251, 253. 



Stoiachactis, 74. 



Structure, as evidence of mind, 35 ff. ; 



as evidence of discrimination, 54 f. 

 Support, sense of, 239. 

 Systems of successive movements, 278 ff. 



Tactual cues in maze running, 281. 



Talbot-Plateau Law, 152. 



Taming, 266. 



Tealia, 73. 



Telasthetic taste, 81. 



Temora, 203. 



Temperature, effect on phototropism, 



202. 

 Temperature, responses to, 61, 214, 



249 f. 



Termites, 102, 155. 

 Thigmotaxis, 66, 81. 

 Thyone, 86. 

 Tiaropsis, 138. 

 Tones, hearing of, 133 f. 

 Touch, 61 f., 67 ff., 75 ff., 79 ff., 87, 281. 

 Toxopneustes, 141. 

 Tropism, 193 ff. 



Tubularia, 71, 73, 137. 

 Turtle, 165, 192, 224, 239, 274. 



Ultra-violet rays, 147, 155, 252. 

 Unpleasantness, 83, 89, 143 f., 246, 250 1., 



264, 267, 277, 284. 

 Useless movements, dropping off, 258 



ff., 288; organization into systems, 283. 



Vanessa, 210. 



Variability of behavior, as evidence of 



mind, 29 f. 

 Vertebrates, chemical sense, 109 ff. ; 



hearing, 126 ff. ; color vision, 159 ff. ; 



geotropism, 190 ff. 

 Virbius, 119. 



Visual cues in maze running, 281 f. 

 Vision, reaction to change in intensity, 



J 35 ff- > photokinesis, 143 ff. ; color 



vision, 144 ff. ; of motion, 216 ff. ; 



image vision, 218 ff.; of distance, 



237 ff- 



Vitalism, 20. 

 Volvox, 136. 

 Vorticella, 251. 



Wasp, 91, 109, 156, 234 ff., 286 f., 291. 



Weber's Law, 169. 



Wetness, effect on phototropism, 206. 



