IUDIATA DIAGRAM 7. 



165 



solid framework remains, whicli supported the flesh of the animal ; 

 and it is this horny part alone which is used. 



The Sea-anemones are closely allied to the corals, but have no 

 hard skeleton ; they live fixed to rocks, and when they open and 

 unfold their beautifully-coloured tentacles, they appear like 

 moving flowers. 



The Medusce, or Jelly-fish, somewhat resemble the anemones, 

 but live floating on the sea. Some sting severely, but they 

 consist almost entirely of sea-water ; and even the largest species, 

 though measuring two or three feet across, will dissolve so com- 

 pletely as to leave no more than a film on paper. 



The Starfish, which have five 

 or more arms radiating from the 

 centre of the body, and the sea- 

 hedgehogs, or sea-eggs, which are 

 round and covered with spines, 

 are also radiata. 



Some authors also place 

 this 



in 



sub-kingdom those swarms 



Medusa. 



Starfish. 



Infusoria, magnified. 

 150 times. 



Infusoria, magnified Infusoria, magnified 

 300 times. 100 times. 



