308 ANIMAL LIFE 



BKANCH IV. PLATYHELMlN'THES 



CLASS I. Turbella'ria. 



Planaria. 



CLASS II. Tremat5'da. 

 CLASS III. Cesto'da. 



Tape-worm, Tce'nia, Lig'ula, flat-worm. 

 APPENDIX TO PLATYHELMIXTHES CLASS Nemertin ea. 



BKANCH V. NEMATHELMlN'THES 



CLASS I. Nemato da. 



Syn'gamus, round-worm, Trichl'na, Bothrioceph' alus, pup- 

 worm, Unclna 'ria. 

 CLASS II. Acanthoceph ala. 

 CLASS III. Chaetog natha (ke-tog'-na-tha). 



BRANCH VI. TROCHELMlN'THES 



CLASS I. Rotif era. 



Rotato'ria. 



CLASS II. Dinophi lea. 

 CLASS III. Gastrbt'richa. 



BRANCH VII. MdLLUSCOI'DA 



CLASS I. FSlyzo a. 

 CLASS II. Phoro'nida. 

 CLASS III. BrachiSp oda. 



BRANCH VIII. ECHfNODER'MATA 



CLASS I. Asteroi dea. 



Starfish. 



CLASS II. Ophiuroi' dea. 

 CLASS III. Echiiioi dea. 



Sea-urchin. 

 CLASS IV. HSlothuroi'dea. 



Sea-cucumber. 

 CLASS V. Crmoi'dea. 



Crinoid, Khlzocrl 'nus. 

 CLASS VI. Cystoi dea. 

 CLASS VII. Blastoi dea. 





