THE AUSTRALIAN HYDROMEDUS^E. 

 Continued. 

 By R. von Lendenfeld, Ph.D. 

 Part II. Plate VI. 



THE 1st SUBOBDO HYDROPOLYPINJE. 



THE FAMILIES HYDRIDE, CLAVIDM, MYRIOTHELID.E AND 

 EUDENDRID^. 



In Part I. of this Monograph the reasons are given, which 

 have induced me to relinquish the old classification of the Hydro- 

 medusae, and I now intend to apply the classification pointed oat 

 above to the Australian Hydromedusse. In this part all known 

 Australian species, together with a number which I have 

 discovered, and which will be described here for the first time, 

 belonging to the above Families of the Hydromedusas, shall be 

 registered with the necessary references. 



ORDO, HYDROMEDUSSE. Cams, 1864. 



POLYPOMEDUSiE, WHICH OFTEN FORM COLONIES 

 WITH A CHITINOUS SKELETON, AND WHICH IN THE 

 FREE SWIMMING: STATE ARE GENERALLY SOLITARY 

 MEDUSAE. IN THE COLONIES ALIMENTARY POLYPS 

 WITH A SIMPLE SACK-SHAPED GASTRAL CAVITY, 

 WITHOUT ENTODERMAL FILAMENTS, ARE ALWAYS 

 PRESENT. BESIDES WE GENERALLY MEET WITH 

 DIFFERENTIATED, DEFENSIVE AND GENERATIVE 

 ZOOIDS. 



