3 o8 



INDEX 



Memory. See Associations. 



Mental diseases, chemical theory of, 



207 



Meyer, 148, 149, 212 

 Mollusks, 128, etc. 

 Moth, 177-183 

 Motor nerves in arthropods, 113 



regions of cerebral hemispheres, 



259-273, 277 



Mliller, Johannes, 290 



Munk, 269-272, 276 



Miinsterberg, 216, 235 



Muscular activity, a measure of men- 

 tal activity, 294, etc. 



Nagel, 60, 228 



Nereis, 83, 87, 90-98, 116 



Neuron, 45, 161 



Nceud vital. See Respiratory Centre. 



Norman, 65, 229-232, 235 



Occipital lobes, 262, 269 



Optic nerve, 150 



Orientation and functions of elements, 

 160-170 



Oxygen, importance of, for associa- 

 tions, 215, 255, 256 



Pain-sensations in animal, 229-231 

 Palaemonetes, 164, 178 

 Parker, 52, 60 



Pars commissuralis, 139, 140 

 Patten, 105 

 Peckham, 224, 235 

 Pedal ganglia of Mollusks, 131 

 Pfliiger, 248-251, 258 

 Phrenic nerve, 109 

 Phrenology, 277 



Pigeons, without cerebral hemi- 

 spheres, 239-244 



instincts of, 196 

 Planarians, 72, etc., 230 

 Plateau, 222 

 Pollock, 60 

 Polygordius, 193 



Porter, 25, 26, 34, 112, 126 



Porthesia, 188 



Posterior roots, 113, 135 



Preyer, 64, 70, 71, 219 



Progressive motion. See Spontaneity. 



Psychic phenomena. See Association. 



blindness, 269-272 



localisation, 259-276 



Pterotrachea, 128 

 Purposefulness, 2, etc., 177, etc. 



Quincke, 22, 34 



Reflexes, general remarks, 1-6 



coordinate character of. See Coor- 



dination. 



special. See various groups of ani- 



mals. 



without ganglion, 35-46 

 Respiration, in relation to ganglia, 



107 



in frog, 143 _ 



in higher animals, 109 

 Respiratory centre, 110-112, 143, 146 

 Responsibility, 234 



Rhythmic, innervations, 294, etc. 

 motion in general, 9 ; in Me- 

 dusae, 18, etc. ; in heart, 23-30 ; 

 in respiration. See Respiration. 



theory of rhythm, 21 

 Ribbert, 195, 206, 212 

 Rieger, 279, 287 



Righting motion of Actinians, 56-59 ; 

 starfish, 61-65 i Planarians, 74 ; 

 arthropods, 124 



Rolando, 239 



Rolling motions. See Forced Move- 

 ments. 



Romanes, 18, 24, 31, 34, 63, 71, 219 



Rosenthal, 21 



Sachs, 66, 203, 290 



Salamander, 142, 160, 204 



Schaper, 42, 47, 206, 212 



Schrader, 139, 143, 149, 157, 236-241, 

 258 



Schweizer, 164 



Segmental theory of reflexes, general 

 remarks, 82, 147, 148 ; of worms, 

 82, etc. ; of Arthropods, 117 ; 

 of vertebrates, 133, 145 ; rela- 

 tion to cerebral hemispheres, 259- 

 276 



Self-preservation, instinct of, 183 



Semicircular canals, 167, 168, 176 



Semi-decussation, 150-159 



Sensations, 290, etc. 



Sexual cells, bearers of hereditary 

 properties, 201 



influence of nervous system 



upon, 204-211 



