CONTENTS 



CHAPTER III 



PLATODES 



PAGE 



Mjstematw uemew ..... .133 



1. General Remarks . ... 135 



2. The Body Form . . 137 . 



3. The Outer Body Epitheliitm . 133 



4. The Gastko-oanal System . 138 



5. SirppOBTING OeGAKS, PASSIVE ORGANS OE LoOOMOTIDN . . 143 



6. The Musculature . . . 144 



7. Organs of Adhesion . 145 



8. The Nervous System . . .146 



9. The Sensory Organs . .149 



10. The Body Parenchyma . . . .151 



11. The Excretory or "Water-vascular System . . 152 



12. The Sexual Organs ....... 154 



13. Asexual Reproduction and its Origin — The Organisation of the 

 Oestoda ..... . . 163 



14. Ontogeny of the Polyclada . . 167 



15. The Life-history of the Trematoda 168 



16. The Life-history of the Cestoda • . . . . 171 

 The Influence of Parasitism on the Structure and Development of 



Animals .... ... 172 



Steobilation and Segmentation . . 175 



Literature ... .176 



CHAPTER IV 



VERMES 



Systematic Reviev) ..... 



1. Form of Body and Outer Organisation 



2. The Integument .... 



3. The Dermo-muscular Tube 



4. The Proboscis of the Nemertina and Aoanthooephala 



5. The Intestinal Canal .... 



A. The Foee-gut 



B. The Mid-gut 



C. The Hind-gut and the Anus 



178 

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 193 

 197 

 200 

 201 

 205 

 209 



