CONTENTS 



CHAPTER XIX 



AKACHXIDA (APPENDIX l) 



PAQE 



Takdigkada — Occurrence — Ecdysis — Structure — Development — 



Affinities — Biology — Desiccation — Parasites — Systematic . . 477 



CHAPTER XX 



arachnida (appendix ii) 



Pentastomida — Occurrence — Economic Importance — Structure ■ 

 Development and Life-History — Systematic 



PYCKOGONIDA 



CHAPTER XXI 

 Pycnooonida . .... 501 



IITDEX ... . 543 



