AUSTRALIAN IIYDROMEDUS.i:. 37 



159. Eucope annulata. V. Lendenfeld. (95) 602. 

 East coast of New Zealand (Lyttelton). 



160. Eucope hyalina. V. Lendenfeld. (98). 

 East coast of Australia (Port Jackson). 



50. Genus OBELIA. Peron ct Lesueur. 



Eucopina?, with eight marginal vesicles and numerous tentacles. Marginal 

 vesicles at the axial side of the adradial tentacles. No marginal cirri, four 

 gonads. Subumbrella, with rudimentary vellum. No stalk to the stomach. 



Polyps with radial hydrotheca? on a ramified colony. Medusae bud on 

 polypostyles. (54) 526, (65) II 634, (131) 155. 



161. Obelia Australis. V. Lendenfeld. (95) 603, (98). 

 East coast of Australia (Port Jackson). 



162. Obelia geniculata. Allman. (9) 59, (16) 174, (25), (63) 149, (95) 603. 



Campanularia geniculata (40) 548. 

 Laomedea geniculata (83) 208. 

 Obelia lucifera (50) 175. 

 Sertularia geniculata (45) 1312. 

 Thaumantias lucifera (41) 52. 



East coast of Australia (Port Jackson). South coast of Australia (from 

 King George's Sound to Western Port). New Zealand (Lyttelton, a.o.p.). 



51. Genus TIAROPSIS. L. Agassiz. 



Eucopinse with eight adradial marginal vesicles and numeixms tentacles. 

 Eight marginal vesicles with numerous otolithes, always between two tentacles, 

 No marginal cirri. Four gonads, stomach sessil. 



163. Tiaropsis Macleayi. V. Lendenfeld. (95) 604. 

 East coast of Australia (Port Jackson). 



52. Genus MITROCOMIUM. Haeckel. 



Eucopina? with sixteen marginal vesicles and eight tentacles, marginal cirri 

 between them. Four gonads. Stomach sessil. 



164. Mitrocomium annse. V. Lendenfeld. (95) 606. 

 East coast of Australia (Port Jackson). 



53. Genus EUTIMALPHES. Haeckel. 



Eucopinae with eight adradial marginal vesicles and numerous tentacles. 

 Between them marginal cirri. Four gonads ; a long stalk to the stomach. 



165. Eutimolphes pretiosa. Haeckel. (50) 195, (95) 607. 

 Australia. 



IV. Sub-familia EUCOPELLINJE. V. Lendenfeld, 1883. 



Medusa? without stomach and tentacles, highly developed organs of sense, 

 fight marginal vesicles. Four radial canals, which send branches into the 

 four gonads. Alimentary polyp in a radial hydrotheca. Polypostyle con- 

 sisting of four radial tubes, between which the medusa? bud. 



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