234 THE AUSTRALIAN HYDROMEDUSiE, 



V. SUB-FAMILY AEQUORIN^E. 

 Aequoridee. Eschscholtz. 

 "With marginal vesicles and numerous (at least 8), often branched 

 Radial Canals. 



Octacanna. Haeckel. 

 Zygocanna. Haeckel. 

 Zygocannota. Haeckel. 

 Zygocannula. Haeckel. 

 Halopsis. A. Agassiz. 

 Aequorea. Peron et Leseur. 

 Rhegmatodes A. Agassiz. 

 Stomobrachium. Brandt. 

 Staurobrachium . Haeckel. 

 Mesonema. Eschscholtz, 

 Polycanna. Haeckel. 



12. FAMILY CAMPANULINID^E. Von Lendenfeld, 1884. 



Colonies of Polypes which ate differentiated into alimentary 



Zooids with one verticil of filiform tentacles and generative 



Polypes, Polypostyles without mouth or tentacles. Both kinds of 



Zooids are invested by chitinous capsules. The Polypostyles only 



produce by budding sexual Zooids, which are rudimentary Medusae 



and never become free. 



SCHEMA : 



Ovum 



I 

 medusoid btid 



I 

 Polype Polypostyl 



Hydrorhlza 



I 

 First Polyp. 



I 

 Ovum. 



Gonothyrea. Allman. 



Halecium. Oken. 



(According to "Weismann all the genera placed under the heading 



Campanularidge, should be placed here.) 



