44 Invertebrata. 



the body becomes enormously swollen by the inordi- 

 nate amount of water which the anemone takes in. 



Multiplication. Sea anemones occasionally 

 multiply by division, but, in general they increase 

 by the development of eggs, in the thick cord -like 

 edges 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. 



CaryophyUia fascicttlata, a sclerodermic coral. The Jeft 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 polypes 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 



