CONTENTS. 



PAGE 



A SOURCE OF MENTAL CONFUSION 91 



WEAKNESS OF USE-INHERITANCE 94 



INHERITED INJURIES 101 118 



INHERITED MUTILATIONS 101 



THE MOTMOT'S TAIL no 



OTHER INHERITED INJURIES MENTIONED BY 

 DARWIN 1 1 1 



QUASI-lNHERITANCE Il6 



MISCELLANEOUS CONSIDERATIONS . . 119143 



TRUE RELATION OF PARENTS AND OFFSPRING 119 



INVERSE INHERITANCE 123 



EARLY ORIGIN OF THE OVA 124 



MARKED EFFECTS OF USE AND DISUSE ON THE 



INDIVIDUAL 126 



WOULD NATURAL SELECTION FAVOUR USE- 

 INHERITANCE? 127 



USE-INHERITANCE AN EVIL 128 



VARIED EFFECTS OF USE AND DISUSE .... 134 



USE-INHERITANCE IMPLIES PANGENESIS .... 137 



PANGENESIS IMPROBABLE 138 



SPENCER'S EXPLANATION OF USE-INHERITANCE 141 



