5 10 



CCELENTERA TES. 



ding .polyps separate from one another completely, forming so many distinct 

 individual polyps. 



In the brain-corals, or Meandrina, we have animals budding, but not com- 



A BRAIN-CORAL. 



A, Stock with the soft-parts ; B, Skeleton. (Nat. size.) 



pletely separating. No hard wall grows between the bud and its parent, although 

 such separate the polyps less closely related. We thus get a system of valleys 



THREE MOUTHS, WITH TEN- 

 TACLES AND DIVIDING 

 WALLS OF BRAIN-CORAL. 



with rows of mouths, 

 belonging to the 

 polyps, which have 

 budded off from one 

 another. The valleys 

 are bounded on each 

 side by the hard 

 walls separating 

 them from similar 

 valleys containing 

 similar series of 

 polyps. The three 

 illustrations will en- 

 able the reader to 

 understand this brief 

 description. 



We have hitherto described skeletonless forms, and forms 



A HORNY CORAL, Antipathes arburea (nat. size). 



Horny Corals. 



secreting solid, stony skeletons; the Antipatharia have horny 



