244 THE SCYPHOMEDUS.E OF THE SOUTHEKN HEMISPHERE, 



Species. Procharybdis cuboides. 



Haeckel, System der Medusen. Seite, 439. 



Umbrella nearly cubic, stubbed above, the same height as 

 breadth. Gastral cavity square, quite flat with 4 short mouth 

 flaps. 4 Phacelles bipartate, with very short and numerous 

 Gastral filaments. Twice as broad as their interval. Margin of 

 Umbrella hardly flapped. The distance of the niches of the sense 

 organs to the margin of the Umbrella about half the distance of 

 the pedal base. Velarium pretty broad, quite simple, plaited. 

 Pedalia nearly lancet-shaped, broadest in the middle, with two 

 narrow wings, half the height of the Umbrella. Tentacles about 

 as long, swollen to a roundish knob at the end. 



Size : Breadth of Umbrella, 35 mm. Height of Umbrella, 

 35 mm. Ontogenesis unknown. 



Locality : Tropic Zone of the Pacific Ocean ; Sandwich Islands. 

 Ballier. 



Species. Procharybdis securigera. 



Haeckel, System der Medusen. Seite, 640. 



Umbrella nearly cubic, stubbed above, as high as broad. Gastral 

 cavity quadrate, flat, with 7 triangular mouth flaps, 4 pair wing- 

 shaped Phacellse, every one split in 10 — 20 filaments. Margin of 

 Umbrella slightly 8 flapped. The distance of the niches of the 

 sense organs from the margin of the Umbrella is the same as their 

 distance from the pedal base. 4 Pedalia axe-shaped, half as long as 

 the height of the umbrella. 4 Tentacles which are longer than the 

 height of the Umbrella swollen at the base to a roundish knob. 



Size : Breadth of Umbrella, 40 mm. Height of Umbrella, 

 40 mm. 



Locality : Pacific Coast of Central America. Fuchs. 



Genus. Charybdea. Peron et Leseur. 

 Charybdeide with 4 simple interradial tentacles, with Pedalia, 

 suspended velarium (velar-canals with 4 perradial Frenula). Gastral 

 cavity flat and low, without broad mesenteria. 4 horizontal 

 groups of filaments, single or double, fascicular or pencil-shaped, 

 onlv on the interradial corners of the fundus. 



