INDEX OF SUBJECTS 



Abstraction, 322. 



Accommodation, 241. 



Acephala, chemical sense, 84. 



Actinia, 73, 182, 193, 203, 254, 259. 



Actinobolus, 69. 



Adamsia, 72, 74, 254. 



Adaptation, sensory, 251 ff. f 256 f. 



Adaptation, darkness, 149, 152, 165 f., 

 168. 



/Eolosoma, 83. 



Age, effect on learning, 309 f. 



Aiptasia, 73, 215, 251, 254. 



Allolobophora, 81 f. 



Amblystoma, 112. 



Amoeba, 38 fT., response to change in 

 light intensity, 135 ; response to colors, 

 146; reaction to locali/.ed stimuli, 



173 f- 



Amphibia, chemical sense, in f. ; color 

 vision, 163 f. 



Amphioxus, chemical sense, 109; color 

 vision, 159 f. 



Amphipods, 194. 



Amphithoe, 88. 



Anecdote, Method of, 4 ff . 



Anemotropism, 178, 213 f. 



Annelids, chemical sense, 81 ff. ; orienta- 

 tion to gravity, 184 f . ; hearing, 117; 

 color vision, 147 f . ; response to change 

 in light intensity, 139 f. ; 251 f. 



Anticipation of movements, 302 ff. 



Ants, taste in, 91 ; smell, 94 ff. ; homing, 

 96 ff. ; recognition of nestmates, 100 

 ff . ; hearing, 123 f . ; color vision, 

 I 5S; perception of light direction, 

 220 f. ; form perception, 230; 252, 

 255 ; maze experiments, 273. 



Arachnida, chemical sense, 89 f. See 

 Spiders. 



Arenicola, 146. 



Arthropods. See Crustacea, Spiders, 

 Insects. 



Associative memory, 30 f. 



Asterias, 141. 



Attention, 52, 253, 284, 305 f., 313 ff. 



Attitudes, revived, 301 f. 



Auditory cues in maze running, 281 f. 



Axolotl, 260. 



Background, effect on phototropism, 



207. 



Balancing reactions, 191 f. 

 Balanus, 201, 203. 

 Bat, hearing, 134. 

 Bees, attraction to flowers, 104 f., 157 f.J 



homing, 105 ff., 231, 287; recognition 



of hivemates, 107 ff. ; hearing, 124; 



color vision, 155 ff. ; form vision, 225. 

 Behavior, as evidence of discrimination, 



55 . 



Behaviorism, 22 ff., 277. 



Bembex, 234 ff. 



Beroe, 77. 



Binocular vision, 220, 241 f. 



Birds, smell and taste, 112 f. ; color 

 vision, 165 ff. ; hearing, 131 f. ; form 

 vision, 226 f. ; migration, 236 f. ; 

 puzzle box experiments, 268 f . ; maze 

 experiments, 274 f.; Multiple Choice 

 Method, 299 f. 



Bispira, 251. 



Blowfly larva, 159. 



Branchipus, 142, 188, 210. 



Brightness value of colors, 145 ff. 



Bunsen-Roscoe Law, 195. 



Bursaria, 68. 



Calyptraea, 85. 



Carmarina, 75 f. 



Cat, 113, 134, i?i, 266, 269 f., 289, 



292 f. 



Caterpillar, 225. 

 Centrostephanus, 141, 252. 

 Cereactis, 146. 

 Cerianthus, 72, 182. 

 Chemical sense, 63 ff. 



377 



