ACTIXLE. 



485 



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

 cles disappeared when the animal was touched." 



Fig. 237. — Actinozoa, 



1, Fungm agariciformis. 2, Alcyonium, Cydonuim Mulleri. 3, Cydmuum, 

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

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

 magnified, showing internal structure. 7, Corallidce ; Coral. 8, Coral, polypes 

 protruding from the cells. 9, Gorgonia nobiUs, polypes expanded. 10, Ttcbi- 

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

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

 ethers withdrawn into polypidcms. 



