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ZOANTHARIA 



4. A sea-anemone with tentacles expanded (Anemonia sulcata). Aboral disc for attachment ; 

 tentacles ; mouth. 



5. A colonial coral-forming Zoantharian (Asteroides calycularis). Polyps, some expanded and 

 some retracted, with mouth and tentacles ; thecae or cups of calcareous matter with radiating septa. 



6. The dried theca of a solitary coral-forming Zoantharian (Fungia). Septa. 



7. Dried skeletons of different forms of corals, (a) Lophohelia, (b] Oculina. Theca; septa; 

 costse. 



