THE AUSTRALIAN HYDROMEDUS^. 



By R. von Lendenfeld, Ph.D. 



Part III. 



Plates VII. and VIII. 



THE 1st SUBORDER HYDROPOLYPIN^E. 



THE BLASTOPOLYPIDiE. 



5. FAMILY BLASTOPOLYPIDIE. Von Lendenfeld, 1884. 



Hydropolypinse which form colonies of Zooids, which attain 

 different shapes, adapting themselves to different parts of the work 

 that has to be performed by the whole. There are always 

 alimentary Zooids, Trophosomes and generative Zooids, Poly- 

 postyles in one colony. The alimentary Zooids never mature the 

 genital products, this duty devolves exclusively on the Poly- 

 postyles. 



I. SUB-FAMILY CORDYLOPHORIN^E. Von Lendenfeld, 1SS4. 



Branched colonies bearing alimentary Zooids, with scattered 

 filiform tentacles, and Polypostjdes. 



No representative of this group is known to occur in Australia. 



II. SUB-FAMILY BIMERIN.E. Von Lendenfeld, 18S4. 



Branched colonies which bear alimentary and sexual Zooids. 

 The former have a single verticil of filiform tentacles. 

 No Biruerinse are known to occur in Austi'alian waters. 



