AUSTRALIAN HYDROMEDUS.E. 33 



36. Genus TURRITOPSIS. McCracly. 



Tiarinse, with numerous tentacles in one row. One ocellus inside, on the 

 axial side of the base of the tentacles. Stalk to the stomach. No mesen- 

 teria. Gonads, four simple perradial ; simple or bipartate longitudinal bul ges, 

 divided from each other by a deep furrow, with smooth surface. Mouth-flaps, 

 with stalked nettlewarts on. the margin. 



138. Turritopsis pleurostoma. Haeckel. (50) 67, (95) 588. 

 Melicerlo pleurostoma (115) 353. 



North-west coast of Australia (De Witt's Land). 



139. Turritopsis lata. V. Lendenfeld. (95) 588. 

 East coast of Australia (Port Jackson). 



III. Sub-familia MARGELINJE. V. Lendenfeld, 1884. 



Anthomedusidae with simple or branched mouth arms. Gonad divided into 

 four or eight marginal flaps. Alimentary polyps one verticil of filiform 

 tentacles. 



37. Genus LIZUSA. Haeckel. 



Margelinse with simple unbranched styles round the mouth, and with four 

 perradial bundles of tentacles. 



140. Lizusa prolifera. V. Lendenfeld. (95)589. 

 East coast of Australia (Port Jackson). 



38. Genus LIMNOREA. Peron. 



Margelinte with branched or otherwise complicated mouth arms (styles) and 

 with numerous equally distributed tentacles. 



141. Limnorea triedra. Peron. (15) 290, (31) PI. 52, fig. 1, (95) 591, 

 (102) III. 5, (115) 329. 



Diancea triedra (82) 505. 

 Limnorea proboscidea (50) 87. 

 South coast of Australia (Bass' Straits). 



39. Genus MARGELIS. Steenstrup. 



Margelinae with ramified or composite mouth-styles, with four perradial 

 bunches of tentacles. Stomach small, sessil. No manubrium. Mouth- 

 styles touching at the base. The gonads do not extend to the radial canals. 



142. Margelis trinema. V. Lendenfeld. (98). 

 East coast of Australia (Port Jackson). 



40. Genus NEMOPSIS. L. Agassiz. 



Margelinre with branched or composed mouth-styles, and with four perradial 

 bunches of tentacles ; mouth small. The mouth styles originate at the base 

 of the oesophagus separately. The gonads extend from the stomach edges 

 to the radial canals. 



