xii CONTENTS 



CHAPTER IV. ANIMAL BEHAVIOUR 



7. The Organs of the Sensori-Motor System 



PAGE 



39. On the Receptor Organs . . . . . . loi 



(a) The Classes of Receptors ; {h) The Nature of a Receptor 

 Organ ; (c) The Physical Nature of Stimuli ; {d) Reception 

 in General ; {e) The Conduction of Stimuli. 



40. On Nervous Conduction . . . . . .107 



{a) The Neurone ; {h) The Nervous Impulse. 



41. On Ganglionic Centres . . . . . . .110 



{a) The Synapse ; {h) Ganglia. 



42. On the Effector Organs . . . . . .112 



{a) The Reflex Arc. 



II. Sensation and Perception 



43. On Sensation as a Possible Physical Process . . • 115 



{a) The Train of Events in a Conscious Process ; {b) Pure 

 Sensation ; (c) Classifiable Sensations ; {d) Nervous Energies ; 

 {e) Reception and Behaviour ; (/) The Unities of Sensation ; 

 Ig) The Intuition of Duration ; {h) The Intuition of Space ; 

 (/) The Forms of Time and Space. 



44. On the Mind and its Operators . . . . .125 



{a) The Elementary Operators ; {b) The Acquired Operators. 



45. On Perceptions . . . . . . . .129 



///. The Purposes of Behaviour 



46. On the Life-urges. . . . . . . .130 



{a) Assimilation ; (&) Growth and Reproduction ; (c) Self- 

 preservation. 



47. On the Manifestations of the Urges in Behaviour . 13' 



{a) Assimilation and its Manifestations ; (6) Manifestation of 

 the Growth-urge ; {c) Manifestations of Individual Preserva- 

 tion ; {d) The Elements and Patterns of Behaviour ; (e) The 

 Versatility of Behaviour. 



48. On the Purposes of Behaviour . . . . -135 



(a) The Organism as a Monad. 



49. On Organic Purpose . . . . . • .137 



IV. The Levels of Behaviour 



50. On the Inorganic Model ; Simple Response . . -139 



{a) The Muscle-nerve Preparation. 



51. On Tropisms ......•• 141 



52. On Taxis ......... 142 



(a) The Resolution of Taxis. 



53. On Reflex Actions ....... 144 



{a) The Centres in Reflex Activities; {b) " The Integrative Action 

 of the Central Nervous System ; " (c) Characteristics of 

 Reflexes ; id) The Purposes of Reflexes. 



54. On Action ......... i49 



(a) Organic Experience ; {b) Trial, Error and Experience ; 

 (c) The Establishment of a Motor-habit ; {d) Intelligence and 

 Instinct. 



