26 



HYDR0Z0A. 



Fig. 4. 



X-J 



l*e 



.0* 



Morphology of Hydeozoa : — a, Hydrid ; b, Cory nid ; £, Sertu- 

 larid ; d, Calycophorid ; e, Physophorid ; /, Medusid ; g, Lucer- 

 narid ; — 7t, polypite ; t, tentacles; k, ccenosarc; ir', hydrotheca 

 or polype-cell; */, nectocalyx or swimming-bell; a, pneumatophore 

 or float; •, umbrella. (These drawings are diagrammatic.) 



with a c hydrorhiza/ or adherent disc, prehensile 

 i tentacles/ and organs of reproduction (Jig. 4, »)• 







