21 DESCRIPTIVE CATALOGUE OF THE 



They remain there till they are fit to turn into Scyphystomas, then escape and 

 affix themselves with the aboral pole to any free submerged surface. The 

 Scyphystoma does not differ from other Scyphystomas. 



Locality. Port Phillip, von Lendenfeld ; Glenelg, Haacke. 



PSEUDORHIZA HAECKELi, Haacke. 



Pseudorhiza Haeckeli, W. Haacke. Pseudorhiza Haeckeli spec. nov. der end- 

 spross des discoundusenstammes biologisches centralblatt. Bond 4, Nr. 10. 

 Seite 291. 



Similar in every respect to the above species, but with only one single iila- 

 ment on one arm. It seems to rne not impossible that my species Pseudorhiza 

 aurosa may be a younger stage of this one. There seem, however, to be dif- 

 ferences between them also apart from the difference in the development of 

 the filaments. No diagnosis is given by Haacke in the above loc. Dr. Haacke 

 was so kind as to furnish me with a drawing of his species, and it appears 

 that the solitary filament of Pseudorhiza Haeckeli is much thicker, one about 

 3 cm, than the filaments in Pseudorhiza aurosa, which only measures -| cm 

 in thickness. 



Ontogenesis Unknown. 



Locality. St. Vincent Gulf, Haacke. 



Familia ARCHIRHIZIDJE. 



Glaus, 1883. 



Rhizostonire of small size with eight unbranched mouth-arms, without ter- 

 minal branches, with simple canal system. The radial canals are joined by a 

 ring canal, and form only very few ramifications. 



Genus ARCHIRHIZA. Haeckel, 1879. 



Mouth-arms without vesicles or filaments, with sixteen radial canals, ring 

 canal, and eight marginal bodies. 



With four distinct sub-genital pouches. 



ARCHIRHIZA TRIMORDIALIS. E. Haeckel. 



Archirhiza 2irimordiaUx, E. Haeckel. Das System der Medusen. Seite 565. 

 Tafel xxxvi. Fig. 1, 2. 



ArcJiirhiza primordialis, R. v. Lendenfeld. The Scyphomedusse of the 

 Southern Hemisphere. Proceedings of the Linnean Society of New 

 South Wales ; volume ix., part 2, page 282. 



