CONTENTS. XV 



CHAPTER III. 



PAOK 

 POLTZOA — MOLLUSCA — GASTEROPODA — BRAOHIOPODA— CONCHI- 

 FERA — CEPHALOPODA — PTEROPODA — TUNICATA — CRUS- 

 TACEA — ENTOMOSTRACA — CIRRIPEDA — ENTOZOA — ANNU- 

 LOSA — ANNELIDA 511 



CHAPTER IV. 



SUB-KINGDOM ARTICULATA — INSECTA — ARACHNIDA .... 579 



CHAPTER V. 



VERTEBiiArA — PHYSIOLOGY — HISTOLOGY — BOUNDARY BE- 

 TWEEN THE TWO KINGDOMS — CELL THEORY — GROWTH OF 

 TISSUES — SPECIAL TISSUES — SKIN, NERVES, CARTILAGE, 

 TEETH, BONE, ETC 654 



CHAPTER VI. 



INORGANIC OR MINERAL KINGDOM — FORMATION OF CRYSTALS 



— POLARISATION — SPECTRUM ANALYSIS, ETC 728 



