CONTENTS. 



PAGE 



PREFACE v 



IMPORTANCE AND BEARING OF THE 



INQUIRY i 



SPENCER'S EXAMPLES AND ARGUMENTS 644 



DIMINUTION OF THE JAWS 6 



DIMINISHED BITING MUSCLES OF LAP-DOGS . 12 



CROWDED TEETH 14 



BLIND CAVE-CRABS 17 



No CONCOMITANT VARIATION FROM CON- 

 COMITANT DISUSE 17 



THE GIRAFFE, AND NECESSITY FOR CONCOMI- 

 TANT VARIATION 18 



ALLEGED RUINOUS EFFECTS OF NATURAL 



SELECTION 23 



ADVERSE CASE OF NEUTER INSECTS 24 



ESTHETIC FACULTIES 29 



b 



