Index 



381 



Spathidium, 6g. 



Starfish, 186 {., 220, 248 S. 



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



Statoliths, 128. 



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



Stbiachactis, 74. 



Structure, as evidence of mind, 35 ff. ; 



as evidence of discrimination, 54 f. 

 Support, sense of, 239; 

 Systems of successive movements, 278 £f. 



Tactual cues in maze running, 281. 



Talbot-Plateau Law, 152. 



Taming, 266. 



Tealia, 73. 



Teljesthetic 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., 7S a., 79 ff., 87, 281. 

 Toxopneustes, 141. 

 Tropism, 193 S. 



Tubularia, 71, 73, 137. 

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



Ultra-violet rays, 147, 155, 252. 

 Unpleasantness, 83, 89, 143 f., 246, 250 £.,• 



264, 267, 277, 284. 

 Useless movements, dropping off, 258 



ff ., 288 ; organization into systems, 283. 



Vanessa, aio. 



Variability of behavior, as evidence of 



mind, 29 f. 

 Vertebrates, chemical sense, 109 ff. ; 



hearing, 126 ff. ; color vision, 1598.; 



geotropism, igo ff. 

 Virbius, 119. 



Visual cues in maze running, 281 f. 

 Vision, reaction to change in intensity, 



13s 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. 



