HTDEOZOA. 



91 



















% 



uous species 



Examples of this habit are afforded 



Fig. 18. 



Morphology of Serttjlariad2e : — a, dried hydrosoma of Sertu- 

 laria tricuspidata ; b, portion of the same ; c, fragment of the 

 coenosarc from a dead specimen of Halecium halecinum; d, gono- 

 blastidmm of H. Beanii ; e, three gonoblastidia of Sertularia 

 argentea;—**', hydrotheca; k, camosarc; p\ gonoblastidium. 

 (All, except a, magnified.) 



by the genera Coppinia and Reticularia, and by 

 several of the true Sertularice. 



