x TABLE OF CONTENTS 



PART II 



PAGE 



XII. RELATION OF AFUS TO THE OTHER CRUSTACEA 



LIMULUS .... 173 



XIII. THE TRILOBITES 209 



XIV. THE EURYPTERID.E 237 



XV. THE NEW CLASSIFICATION PROPOSED 252 



XVI. PERIPATUS AND THE TRACHEATA 279 



APPENDICES . 291 



LITERATURE 3 J 3 



