TABLE SHOWING THE CLASSIFICATION OF THE HYDROZOA 

 DESCRIBED IN THIS CHAPTER 



Class 

 HYDROZOA 



Order LEPTOLINI2E 



(Branched colonies or shrub-like communities of hydroids ; some permanently fixed, 

 others liberate swimming-bells) 



Suborders 



ANTHOMEDUSJE 



(Zooids not covered by 

 protective sheath ; um- 

 brella of medusce strong- 

 ly arched ; egg-sacs in 

 manubriwn) 



Divisions 



LEPTOMEDUSa: 



(Zooids covered with cup- 

 Kke sheaths ; umbrella 

 of medusce thin and not 

 very convex ; egg-sacs in 

 line of radial canals) 



Family 

 GEKYONOPSIDJE 



Family 



JEQUOREID.K 



TUBULARIANS 

 (Without polyp-cups) 



CAMPANULARIANS 

 (Polyp-cups stalked) 



SERTULARIANS 

 (Polyp-cups sessile) 



PLUMULARIANS 



(Polyp-cups on one sidi 



of branches only) 



116 



Genera and Species 



Clava leptostyla 



Hydractinia poly din a 



Coryne mirabilis 



Sarsia 



Eudendrium ramosum 



Tubulai-ia indivisa 



T. Couthouyi 



Parypha crocea 



Corymorpha pendula 



Hybocodon proliftr 



Pennaria tiarella 



P. gibbosa 



JSougainvillea superciliaris 

 / Obelia commissuralis 

 I Eucope diaphana 

 \ Oceania languida 

 I Clylia poterium 



C. bicophora 



(Sertularia pumila 

 S. argentea 

 S cupressina 



J Aglaophemia struthioides 

 | Plumularia falcata 



Tima formosa 

 Zygodactyla groenlandlca 



