AUSTRALIAN IIYDROMEDUS.E. 35 



II. Sub-familia TUBULARINJE. V. Lendenfeld, 1884. 



Polyps with two verticils of filiform tentacles. Meduso-styles l>ud on 

 tentacular processes. 



43. Genus TUBULARIA. Linne. 

 Simple or slightly branclied, long hydrocauli. Polyps situated terminally. 



149. Tubularia Ralphi. Halley. (9) 42, (52), (95) 590. 

 South coast of Australia (Port Phillip). 



150. Tubularia pygmsea. Lamouroux. (9) 42, (15) 471, (82) 127, (83) 

 232, (85) 758, (95), 596. 



Australia. 



151. Tubularia spongicula. V. Lendenfeld. (95) 597. 

 East coast of Australia (Port Jackson). 



152. Tubularia gracilis. V. Lendenfeld. (95) 597. 

 East coast of Australia (Port Jackson). 



44. Genus TIBIANA. De Lamarck. 

 Polyps born laterally ; alternate or rarely scattered on the steins. 



153. Tibiana ramosa. De Lamarck. (9) 43, (15) 469, (82) 206, (83) 219, 

 (85) 743, (95) 598, (126) 425. 



Australia. 



IV. Sub-familia ATRACTYLIN^E. V. Lendenfeld, 18S4. 



The polyps possess a single verticil of filiform tentacles. The medusoid 

 buds are produced on the hydrocaulus, 



II. Familia LEPTOMEDUSIDJE. V. Lendenfeld. 

 LEPTOMEDUS^. Haeckel. 



Medusa' with acelli or octodermal otolithes and gonads, developed in tin- 



walls of the radial canals. 



Medusa? mostly budding on transformed polypes, polypostyles.. 

 Alimentary polyps and polypostyles invested by a chitinous perisarc. Tlie 



polyps possess one verticil of filiform tentacles. (16), (24), (57) 70, (58) 22 1 



I. Sub-familia THAUMANTINJE. V. Lendenfeld, 1884. 

 THAUMANTIDJE. Gegenbaur. 



Leptomedusse without marginal vesicles and simple radial canals. 



45. Genus DISSONEMA. Haeckel. 



Thaumantinse with four gonads, two opposite parradial tentacles and no 

 marginal clubs or cirri. 



154. Dissonema saphenella. Haeckel. (50) 126, (95) 599. 

 c 



