194 THE ANIMAL KINGDOM 



Mesoglea- 



, Hood- 



Ga.st r o d.e.r mi S 



Pi^me-nt Cup 

 visual SLTCci: 



.^mcnt spot 

 sued. a.rea 



Figure 10.12. Section through a rhopalium showing the hood and the various 

 sensory areas. (Modified from Hyman, after Schewiakoff.) 



-\ 



J± 





h 





i 



€ 





Figure 10.13. Reproduction in the Scyphozoa. A, The polyp. A frustule forming 

 on its right will creep off and become another polyp. B. Stroljila. Starting at the upper 

 end, successively lower portions of the polyp transform into medusae. {A modified from 

 Hyman after Perez; B after Hyman.) 



