B 



FIG. 111K Halistemma tergestinum. A, the entire colony; B, a single group of zooids. 

 < . cttfimsarc ; dz. dactylozooid ; /</</<. hydrophyllium or )>ract; wt. nectocalyx or swinniiing- 

 bell; ntc. battery of neinatocysts ; t>. idlj T po ; pn. pneumatophore or float; s, a', sporoeysts ; 

 t. tentacle. (After Claus.) 



