Index 



215 



Kduration of young children, 177 

 of boys of the labouring classes, 



197 



influence of environment on, 201 

 Fnergy, 12 



Fish, their central nervous sys- 

 tem, 97 

 mid-brain and basal ganglia, 



103 

 behaviour in relation to basal 



ganglia, 104 

 possess rudimentary neopallia, 



105, 107 



their nest-building and instinc- 

 tive powers, no 



Forel, on the senses of insects, 87 

 Freeman, Arnold, on boy-life and 



labour, 197 

 ( ierm cells, 29 

 Hereditary qualities in reference 



to education, 167, 184, 186 

 Home life, influence on educa- 

 tion, 194 



Hormones, 21, 185 n. 

 Human being-* and hereditary in- 



instincts, 186 



Huxley on metabolic changes, 17 

 on physical basis of memory, 26 

 Hydroids, their structure, 34 



development of tactile organs, 



35 



development of nerve cells, 36 

 behaviour under action of 



stimuli, 43 



movements are instinctive, 46 

 Ideas, nature of, 158 

 their contents, 160 

 association of, 162 

 of personality, 171 

 Idiots, defective nerve cells of 



. their brains, 144, 146 

 cerebral hemispheres, 147 

 Insects, sensory organs of, 83 

 (heir reflex nervous system, 89 

 memory of, 89 

 Instinct, a fundamental property 



of living matter, 21 

 Instinctive behaviour defined, 19 

 of ants, 89 



Instinctive behaviour of star-fish, 



61 



of worms, 71 

 of higher animals, 136 

 suffices for existence of lower 



animals, 93 

 insufficient existence of higher 



animals, 124 



Lloyd Morgan's opinion re- 

 garding, 20, 51, 122, 123 

 W. McDougall's opinion re- 

 garding, 81, 140 n. 

 in young children, 167 

 depends on action of basal 



ganglia, 168 

 inherent in human beings, 



170, 179 



modified by training, 185 

 elements of nerve cells, 36, 51-2 

 Intellectual processes, 155, 157, 159 

 modifies instinctive action, 



162, 172, 177 

 Intelligence in relation to cerebral 



cortex, 108, 158 

 in relation to perfection of neo- 



pallium, 148 

 of human beings, 150 

 Jennings (Prof.) on behaviour of 



amoeba, 24 

 Keller, M., History of, 155 



new instinctive and intellectual 



processes, 157 

 Kinetic energy, 13 

 Living matter acts as a trans- 

 former of energy, 15, 17 

 its fundamental properties, 26 

 its metabolic changes, 17 

 of nerve cells, 51 

 of sensory organs, 53 

 McDougall, A., on instinctive be- 

 haviour, 140 n. 

 Medusoids, their structure, 39 



nervous system and sensory 



organs, 40, 41 

 behaviour under actions of 



stimuli, 47 

 action of their sensory organs, 



47 

 their rhythmical movements, 50 



