C. DOBELL 183 



ANALYSIS OF CONTENTS. 



N.B. 7%e numbers refer to paragraphs. 



Preface. 



Chapter I. Organization and Life of a Ciliate 1 — 1.5. , " 



Structure 1 — "2. 



Eeproduction 3. 



Encystation 4. 



Conjugation .5 — 8. 

 Meiosis 7. 



Ciliate compared with Metazoon 9 — 15. 

 Chapter II. Life-cycle acCoirding to Maupas 16 — 22. 



Life-cycle 17—18. 



Division 19. 



Conditions for conjugation 20. 



Senescence 21—22. 



Chapter III. Results of later investigators 23—122. 



A. Asexual period 24 — 89. 



Duration of period; "senescence," " depression," — causes and effects 24 — 44. 

 Mechanics of division 45 — 50. 



Effects of chemical and physical agents on division and growth 51 — 60. 

 Variation and inheritance 61 — 88. 



Normal inheritance 61. 



Pure lines 62—65. 



Production and inheritance of variations 66 — 88. 

 Monsters 81—88. 

 Nuclear reorganization without conjugation 89. 



B. Sexual period 90—122. 



Conjugation 90 — 115. 



Assortative mating 90—91. 

 "Karyogamic maturity" 92. 

 "Hunger divisions" 93. 

 "Causes" of conjugation 94—101. 

 Internal 94—96. 

 External 97—101. 

 "Non-conjugating races" 101. 

 " Effects " of conjugation 102 — 115. 

 " Bejuvenescence " 102 — 104. 

 Efl'ects on variation 105 — 115. 

 "Biparental inheritance," 107, 110—111, 114. 

 " Hemisex " 115. 

 Interconjugation ("inbreeding") 116 — 119. 

 Eeconjugatiou 120. 

 Misconjugation 121. 



Cross-conjugation ("hybridization") 122. , 



■Chapter IV. General conclusions 123 — 131. 

 Analysis of Contents. 

 .Bibliography. 



