44 



Invcrtcbrata. 



the body becomes enormously swollen by the inordi- 

 nate amount of water which the anemone takes in. 



Multiplication. Sea anemones occasionally mul- 

 tiply by division, but in general they increase by the 

 development of eggs, in the thick cord-like ovaries 

 on the surface of the mesenteries. These eggs are 

 emitted by the mouth, and from them arise minute, 

 ciliated embryos which become saccular. 



Anemones can be multiplied also by artificial divi- 

 sion, and if an anemone be cut horizontally the 

 mouth end still continues to eat, and finally develops 



FIG. 26. 



Caryophvllia f.iscwilata, a sclerodermic coral. The left side of the figure 

 shows 'the coral denuded of soft parts; on the right the animal matter is 

 shown, while at the upper part several of the polyps are seen projecting. 



a foot, while the foot end may (but seldom does) con- 

 tinue to live and may ultimately develop tentacles. 

 One experimenter produced by his sections an ane- 

 mone with a tentacle armed mouth at each end. 



Corals and Coral Building. Most sea anemones 



