234 



CfELENTERATA. 



by budding. These, the medusas, may separate early from the 

 colony and swim freely. A medusa (figs. 178, 179) has the form 



Fig. 178. — Khopalonema veJninm. r, rinp: can.al; c, exxinihreUa: g, s:onads; ?t. otocystsr 

 hi, stomach; v, nerve ririix; c, nioutli ; .^^ wubumbrolla : /', t'\ tentacles of first 

 and second order; i\ A'cluni. 



of a dome-like or disc-like bell and consists chiefly of an ex- 

 traordiiKirily watery jelly. The bell or umbrella of the medusa is 

 covered 07x both its surfaces — the concave or siihuinbrcUo, the con- 



