210 



CCELENTERATA 



FIG. 171. Campanularia Johnston! (after Allman). a, hydranth with hydro- 

 theca; b, retracted"; d, hydrocaulus; /, gonotheca, with blastostyle and medusa buds; 

 g, free medusa. The hydrorhiza is shown as the creeping portion from which the 

 hydrocauli and gonothecse arise. 



FIG. 172. Section of Eudendrium ramosum. ek, ectoderm; en, entoderm; p, perisarc; 



s, supporting layer. 



