B 



FIG. im Halistemma tergestinum. A, the entire colony ; B, a single group of zooids. 

 cu>. coenosarc ; dz. dactylozooid ; hph. hydrophyllium or bract; net. nectocalyx or swiniruing- 

 bell; ntc. battery of iiematocysts ; p. polype; pn. pneumatophore or float; s, s'. sporocysts ; 

 t. tentacle. (After Claus.) 



