TABLE OF CONTENTS ix 



CHAPTER VI 



GYNANDROMORPHISM, HERMAPHRODITISM, 

 PARTHENOGENESIS, AND SEX 



PAGE 



1. gynandromorphism 161-167 



2. Hermaphroditism 167-173 



3. Parthenogenesis 173-188 



4. Artificial Parthenogenesis 188-193 



CHAPTER VII 



FERTILITY 



1. Inbreeding 194-199 



2. Cross-breeding 200-207 



3. Sexual Reproduction in Paramcecium . . . 207-211 



4. Theories of Fertility 211-219 



CHAPTER VIII 



SPECIAL CASES OF SEX-INHERITANCE 



1. Sex in Bees 220-221 



2. A Sex-linked Lethal Factor 221-223 



3. Non-disjunction of the Sex-chromosomes . . 223-224 



4. The Vanishing Males of the Nematodes . . 224-225 



5. Sex-ratios in Hybrid Birds and in Crossed 



Races in Man 225-227 



6. Sex-ratios in Frogs 228-229 



7. Sex-ratios in Man 229-232 



8. The Abandoned View that External Conditions 



Determine Sex 232-236 



9. Sex-determination in Man . . . - . 236-249 



BIBLIOGRHAPHY 251-278 



INDEX . . 279-282 



