29G THE SCYPHOMEDUS^E OF THE SOUTHERN HEMISPHERE, 



Size : Breadth of Umbrella, 80 mm. Height of Umbrella, 

 3 mm. Ontogenesis unknown. 



Locality : Indian Ocean, near the Cocos Islands. Rabbe. 



Species. Versura vesicata. 



Haeckel, System der Medusen. Seite, 645. 



Umbrella flat, scutiform, with 8 deep ocular incisions, 208 

 coalescing marginal flaps (in each Octant 24 narrow rectangular 

 velar flaps between 2 rudimentary ocular flaps). Sub-genital ostia 

 half as broad as the pillars between them. Arms about as long 

 as the radius of the Umbrella, doubly pinnate, flat, spread out as 

 long as broad. 



Locality : Australia (North-west Coast. 1). Weber. 



Genus. Phyllorhiza. 

 Versuridae, with 8 pinnate mouth-arms. The Pinna? are only 

 rudimentary and appear connected by a membrane, so that the 

 whole arm attains an extended leaf-shaped appearance. 



Phyllorhiza punctata. Nov. sp. 

 Plate IV. 



The Umbrella is nearly semi-spherical, and about half as high 

 as broad. The Umbrella margin bears in every Octant two sickle- 

 shaped ocular flaps, four simple and four double flaps, all of 

 which taper centrifugally and are truncate. These flaps consist of 

 thick gallert and are connected by thin niernbranes. Radial 

 furrows extend centripetally from the fissions towards the centre 

 of the disc. The sub-genital ostia are large and oval, more than 

 twice as broad as the pillars of the brachial disc. The brachial 

 disc is thick and a little more than half as broad as the Umbrella, 

 octagonal, with a canal system of its own, and thickly set on its 

 ventral side with filaments to which the young gastrulaj-embryos 

 adhere. The mouth-arms are § as long as the diameter of the 

 Umbrella. 



Colour : Brachial disc, and stem and branches of mouth-arms 

 and also the ground substance of the gallert of the Umbrella 

 colourless. In the gallert of the Umbrella, close to the surface, 



