Fig. 11. 



. Ohelia. b c d. Medusas of same (c, everted). Us, 

 blastostyle ; coe, common body tissues ; ect, end, ecto 

 and endoderm ; ent, stomach ; gth, generative cap- 

 sules; hth, horny cups; I, lithocyst ; mbd, Medusa 

 bud ; miih, manubrium ; 2^, horny outer covering ; 

 P 1,2,3, feeding polyps; rad. c, radial canal; t, 

 tentacle ; v, velum. (After Parker and Haswell ) 



