LIST OF ILLUSTRATIONS 



FIG. 



225. 

 226. 



227. 



228. 

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 238. 

 239. 

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Scolex of Taenia echinococcus . • 



Process of budding in Microstomum 



Diagram of the relationships of the Platyhelminthes 

 tinea 



Diagram of Nemertine . 



Proboscis of Nemertine 



Tetrastemma .... 



Anterior portion of Nemertine 



Proboscis of Hoplonemertean, retracted 

 ,, ,, everted 



Transverse section of Nemertine . 



Vascular and excretory systems of Nemertine 



Pilidium 



Ascaris lumbricoides 



,, ,, transverse section 



,, ,, muscle fibres . 



,, ,, dissection of female . 



Nervous system of Nematoda 



Ascaris lumbricoides, dissection of male organs 



Body- wall of platymyarian Nematode 



Ankylostoma duodenale . 



Transverse section of Gordius 



Oxyuris 



Gordius, anatomy .... 



Development of Ascaris nigrovenosa 



Trichinella spiralis .... 



Two species of Echinorhynchus (Gigantorhynchus) 



Echinorhynchus gigas, dissection of male . 

 ,, ,, ,,- female 



,, ,, ,, nephridia . 



,, ,, female organs 



Sagitta hexaptera 



bipunctata, transverse 

 , , , , head 



,, hexaptera, eye 

 Development of Sagitta 

 Cheetosoma 

 Echinoderes 

 Desmoscolex 

 A trochophore . 

 Brachionus rubens, female 

 ,, ,, pharynx 



,, ,, male and 



Diagram of a Rotifer 

 Paiaseison asplanchnus . 

 Typical forms of Rotifera 



mastax 



sections 



female, with attached 



and Nemer- 



