220 THE AUSTRALIAN HYDROMEDUS^E, 



1. SUB-FAMILY CLAVINxE, 

 With scattered filiforme tentacles. 

 Clava. Gmelin. 

 Tubiclava. Allman. 

 Rhyzogeton. Agassiz. 



2. SUB-FAMILY CORYNIN.E. 

 Withjscattered capitate tentacles. 

 Coryne. Gartner. 

 Actinogonium. Allman. 

 Wrightia. Allman. 

 Stylactis. Allman. 



3. FAMILY MYRIOTHELID^E. Allman, 1872. 

 Solitary with scattered capitate tentacles. Some of the tentacles 

 are transformed and bear the sexual products. 



SCHEMA. 

 Polype 



Ovum 



I 

 Polype. 



Myriothela. Sars. 



4. FAMILY EUDENDRIM:. Allman, 1872. 



Forming colonies, all Polypes may mature sexual product 



whereby they are often changed into Polypostyles without mouth 



or tentacles. 



SCHEMA. 



Ovum Ovum 



I I 



Polype Polypostyl 



Hydrorhiza 



I 

 First Polype 



I 

 Ovum. 



Endendriam. Allman. 



