ACTINIJL 



485 



vessels placed along the edges of the folds, and the vesi- 

 cles disappeared when the animal was touched." 



Fig. 237. Actinozoa. 



1, Fungia agariciformis. 2, Alcyonium, Cydonium Mulleri. 3, Cydoniuin, 

 polypes protruding and tentacles expanded, others closed. 4, Zoantharia, 

 viewed from above. 5, Madrepore Abrotanoide. 6, Madrepore, cell slightly 

 magnified, showing internal structure. 7, Corallido} ; Coral, 8, Coral, polypes 

 protruding from the cells. 9, Gorgonia nobilfe, polypes expanded. 10, Tubi- 

 pora musica. 11, a tube of same, with polype expanded, and one cut longi- 

 tudinally to show internal structure. 12, Sertularia, polypes protruded ; and 

 others withdrawn into polypidoms 



