ACTI.NOZOA. 



197 



Zoantharia have reference to the form of the 

 polype, with its tentacles and corallum, and that 

 of the compound mass resulting therefrom by 

 a repetition of the process of gemmation. The 

 varieties which these animals present in size, 

 colour, and the superficial aspect of the body are 

 too multifarious to admit of any precise general 

 enunciation. 



%. 34. 



Zoantharia maxacodermata : — a, Actinia (or Sagartia) 

 rosea; b, Uyanthus Scoticus ; c, Arachnactis albida ; d, Zoanthus 

 CoucMi. (Natural size.) 



The form and structure of the polype has been 

 best studied in the soft-bodied Zoantharians, more 

 o 3 



