266 



Index 



Random movements, 164 



r61e in orientation, 70-78 

 Reason in animals, 9, 259-26 

 Reeves, C. D., 230, 331 



Temperature, influence on tro- 



pisms, 94, 101-103 

 Terns, death feigning of, 205, 



206 



Regeneration and behavior, Thigmotaxis, 103-105, 115, 182, 



166 flf. 

 Reimarus, S. H., 19, 20 

 Rheotaxis, 64, 65 

 Rhumbler, L., 180 

 Robertson, T. B., 212, 213 

 Romanes, G. J., 26, 27, 28, 53, 



79, 122, 214 

 Roux, W., 180 

 Royce, J., 66, 67 



Sachs, J., 52, 53 

 Schmidt, P., 209, 214, 216 

 Severin, H. C. and H. H. P., 



209, 210, 212, 213, 214 

 Sex in mental evolution, 239 ff. 



recognition of, 219 ff. 

 Slime molds, behavior of, 193 

 Spence, W., 199 

 Spencer, H., 24, 25, 28, 31, 50, 



51, 132, 133, 139, 163, 164 

 Spiders, death feigning of, 200, 



212, 213 

 Stahl, E., 97 

 Stentor, behavior of, 125-127 



184, 186, 189, 215 



Thomasius, 17 



Thorndike, E., 33, 139-142, 144. 

 149-161 



Torrey, H. B., 89 



Towle, E. W., 104 



Trial and Error, 155 ff., 254 fif. 



Tropisms, relation of to in- 

 stinct, 31, 32, 5S, 62, 63 

 reversal of, 93 



Verworn, M., 99, 214 



Voice, primary function of, 



241-243 

 Voltaire, 67 

 Volvox, reaction to light, 99, 



107, 109-111, 114 



Wasmann, E., 22, 27, 121 



Weismann, A., 28 



Whitman, C. O., 28, 41, 42, 



123 

 Wilson, H. v., 194 



Strasburger, E., 96, 97, 98, 101 ^undt, W.. 28. 122 



Talorchestia, death feigning of, Yerkes, R. M., 33, 104, 129 

 203, 204 



phototaxis in. 57, 94 Zur Strassen, H., 195 



