232 



CCELENTERA TA. 



'FiG.W.—Campanulnrfajnhnstoni. (After Allman.) a, hydranth with bydrotlieca; 

 (>, retracted: rf. hydrocaulus; /, gonotheea, -with blastostyle and medusa buds; 

 (/, free medusa. 



Firi. Kfi. ScftiuTi nf EtHlcnfJrium ramositm. clt, ectoderm; t'?j, entoderm; 2', perisarc; 



s, supporting layer. 



