TRUE MEDUSA. 



247 



has separated from the one below itself. Each disk, as 

 it separates, turns over and floats away, and is known 

 as cpliyra. Soon each ephyra assumes the form of a 



Fig. 475- — Scyphos- 

 toma of Aurelia. 



Fig. 474. — Strobila 

 of Aurelia. Magnified. 



Fig. 476. — Strobila of Aurelia. 

 Much magnified. 



Fig. 477. — Sunfish, or Aurelia. 



perfect Jellyfish, as shown in Figure 477. Thus one 

 scyphostoma which comes from a single egg becomes 

 a strobila, and this strobila divides into numerous 

 parts, each of which becomes a Jellyfish. 



