286 



INDEX 



Darwin, C. R., imperfect instincts 



of Molothrus, 96 

 intelligence of earthworms, 161 

 Lamarokian theory of instinct 



inadequate, 126 

 mental evolution, 260 

 reactions of earthworms, 28, 



140 



Davenport, C. B., 61 

 Davis, H. B., 258, intelligence of 



raccoons, 243, 255 

 Day, L. M. and Bentley, M., 



learning in Paramcecium, 



87-89 



Death-feigning. SeeFeigningDeath. 

 Delage, Y., equilibrium in crus- 

 tacea, 31 

 Delbreuf, J., 231, intelligence ni 



lizards, 229 

 Dellinger, O. P., 89, locomotion in 



Amoeba, 66 

 Descartes, R., consciousness in 



animals, 4 

 Didinium, capture of food, 64, 



77-79 



Dog, imitation in, 256 

 instinct to swim, 97 

 intelligence, 235-237, 240, 245, 



246, 249-251, 255 

 Dragon fly, larval and adult 



instincts compared, 98 

 Driesch, H., geotaxis in Sertulari- 



ella, 30 

 Drzewina, A., 189, tidal rhythms 



in phototaxis of hermit 



crabs, 158 

 learning in Pachygrapsus, 187 



Earthworms, phototaxis, 21, 43, 



44, 54 



intelligence, 161 

 interference of reactions, 140 

 reactions to chemicals, 28 

 varied reactions, 148> 149 



Earwigs, thigmotaxis, 36 



Edinger, L., 231 



Eimer, O. E., 38, definition of 

 instinct, 92 



origin of instinct, 118, 119 

 Electrotaxis, 59 ff 

 Eledone, intelligence, 189 

 Emery, C., 216 



Englemann, T. W., chemotaxis of 

 bacteria, 22 



influence of oxygen on photo- 

 taxis, 49 



Epeira, instincts of young, 98 

 Escherich, K., 216 

 Eubranchipus, photataxis, 54 

 Eudendriumplanulse, photo taxis, 52 

 Euglena, geotaxis, 29 



phototaxis, 28, 44, 45 



Fabre, J. H., 216, constancy of 



instinct, 132 



intelligence of beetles, 206 

 locality sense of mason bee, 197 

 nature of instinct, 91 

 Fatigue as cause of ' change of 

 behavior, 84, 142-145, 149 

 Fear of hawks, not innate, 123 

 in fiddler crabs, 140 

 in Rhea, 122, 123 

 in sparrows, 122 

 in young birds in general, 96, 



121-123 



in young ducks, 123 

 in young rabbits, 123 

 in young terns, 96, 97 

 Feigning death, change of attitude 



in through fatigue, 143 

 in young terns, 96,97 

 Fiddler crabs, interference of reac- 

 tions, 140 



phototaxis, 48, 56, 140, 144 

 Fishes, intelligence, 219 ff 

 rheotaxis, 37, 38, 57 

 Fleure, H. J., and Walton, C. L., 

 162, reactions of Actinia, 

 159, 160 



Fly, behavior of decapitated speci- 

 mens, 104 



