422 General Biology 



Class II. Scyphozoa ( 



Order 1. Stauromeclusae ( 



Order 2. Peromedusae ( 



Order 3. Cubomedusae ( 



Order 4. Discomedusae ( 



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 ( 



