CONTENTS xiii 



V. Excess-Value in Behaviour 



PAGE 



55. On Normality in Organic Activity . . . . -155 



56. On the Excess-values of the Urges of Life . . . 156 



57. On Sublimation ........ 158 



(a) Pleasure and Pain ; (&) Animal Play ; (c) The " Property " 

 Instinct. 



58. On Truth, Goodness and Beauty . . . . .159 



PART II. THE RACE 

 CHAPTER V. REPRODUCTION AND GROWTH 



/. Growth 



59. On Growth in Inanimate Things . . . . . i66 



(a) Crystal Growth. 



60. On Organic Growth , . . . . . .167 



(a) Simple Organic Growth ; (6) Organic Growth with Dif- 

 ferentiation ; (c) Organic Repair and Regeneration ; {d) Re- 

 generation ; (e) Malignant Growth. 



61. On Organic Growth as a Fundamental Life Activity . 170 



62. On the Means of Growth : Cell-division . . .171 



//. Animal and Plant Reprcduction 



63. On Reproduction in Unicellular Organisms . . .174 



(a) Senescence and Rejuvenation ; {b) Conjugation ; (c) The 

 Meanings of Conjugation. 



64. On Reproduction in Multicellular Organisms . . .176 



65. On Asexual Reproduction in Multicellular Organisms . 178 



{a) Vegetative Reproduction ; (6) Budding. 



66. On Sexual Reproduction . . . . . .179 



{a) Secondary Sexual Characters ; {b) Fertilization ; (c) Dis- 

 tribution and Determination of Sex. 



67. On Hermaphroditism . . . . . . .184 



68. On Parthenogenesis . . . . . . .185 



{a) Artificial Parthenogenesis. 



CHAPTER VI. DEVELOPMENT 



69. On Animal Life-histories . . . . . .187 



(a) Types of Life-histories ; {b) The Further Life-histories ; 

 (c) The Specifity of Developmental Phases. 



70. On Embryogeny : I. The Grosser Visible Events . . 191 



{a) Segmentation ; (6) The Potencies and Fates of the Germ- 

 layers and Cavities ; (c) Organogenesis. 



71. On Embryogeny : II. Histogenesis ..... 



{a) De-differentiation ; (6) Re-differentiation. 



72. On Embryogeny : III. Disharmonies and Regulations . 199 



(rt) Regulations ; {b) Isotropic and Anisotropic Ova. 



73. On the Cell-nucleus in Development .... 202 



(a) The Chemistry' of Chromatin. 



