ent, enteric cavity (ccelenteron) ; gth, 

 gonotheca; hth, hydro theca; /, litho- 

 cyst; m. bd, medusabud; mnb, manu- 

 int> brium; msgl, mesogloea; mth, mouth; 

 p, perisarc; P. i, 2, 3, polyps; rad. c, 

 radial canal; t, tentacle; vl, velum. 



