ACTINIiE. 



485 



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

 cles disappeared when the animal was touched." 



Fig. 2B7. —Actinozoa, 



1, Fungia agariciformis. 2, Alcyonivm, Cydonium M^dleri. 3, Cydonium, 

 polj'pes protruding and tentacles expanded, others closed. 4, Zoantharia, 

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

 magnified, showing internal structure. 7, Corallidce ; Coral. 8, Coj-a^, polypes 

 protruding from the cells. 9, Gorgonia nobiUs, 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 others withdrawn into polypidoras. 



