hfih 



Fig. ll^.—Halistemma tergestinum. A, the entire colony ; B, a single gi-oup of zooids. 

 c(£. etenosarc ; dz. dactylozooid ; hph. hydrophyllium or bract ; net. nectocalyx or swimming- 

 bell ; ntc. battery of neniatocysts ; p. polypo ; p/i. pneiimatophore or float ; s, s'. sporocysta ; 

 (. tentacle. (After Claus.) 



