420 GENERAL BIOLOGY 



Class III. Anthozoa ( ) 



Subclass I. Alcyonaria ( ) 



Order 1. Stolonifera ( ) 



Order 2. Alcyonacea ( ) 



Order 3. Gorgonacea ( ) 



Order 4. Pennatulacea ( ) 



Subclass II. Zoantharia ( ) 



Order 1. Edwardsiidea ( ) 



Order 2. Actiniaria ( ) 



Order 3. Madreporaria ( ) 



Order 4. Zoanthidea ( ) 



Order 5. Antipathidea ( ) 



Order 6. Cerianthidea ( ) 



PHYLUM IV. CTENOPHORA 

 PHYLUM V. PLATYHELMINTHES 



Class I. Turbellaria ( ) 



Order 1. Rhabdocoelida ( ) 



Order 2. Tricladida ( ) 



Order 3. Polycladida ( ) 



Class II. Trematoda ( ) 



Order 1. Monogenea ( ) 



Order 2. Digenea ) 



Class III. Cestoda ( ) 



PHYLUM VI. NEMATHELMINTHES 

 PHYLUM VII. ECHINODERMATA 



Class I. Asteroidea ( ) 



Class II. Ophiuroidea ( ) 



Class III. Echinoidea ( ) 



Class IV. Holothuroidea ( ) 



Class V. Crinoidea ( ) 



PHYLUM VIII. ANNELIDA 



Class I. Archiannelida ( ) 



Class II. Chaetopoda ( ) 



Subclass I. Polychaeta ( ) 



Order 1. Phanerocephala ( ) 



Order 2. Cryptocephala ( ) 



