276 THE SCYPHOMEDUSJE OF THE SOUTHERN HEMISPHERE, 



Genus. Drymonema. 

 Cyaneida?, with eight sense organs, which lie remote from the 

 margin of the Umbrella, in deep excavations. Tentacles scattered 

 over the whole surface of the Subumbrella and arranged radially, 

 branched ridges of the gallert lie between them. 



Drymonema Gorgo. 



Fritz Midler. Zoologischer Auzeiger. Band., VI., Seite, 220. 



The Mouth-arms are longer than in other species, attaining a 

 length 2 or 3 times that of the breadth of the Umbrella. The 

 Umbrella possesses 8 x 20 x 16=176 marginal flaps. 



Size : 300 to 500 mm., the diameter of the Umbrella. Tentacles, 

 10 meters or more. 



Locality : Rio de Janeiro. Fritz Mtillei\ 



Genus. Melusina. 

 Cyanidse, with 16 marginal bodies and 16 bundles of tentacles, 

 they are attached in several rows. Margin of Umbrella, with 16 

 main and 64 secundary flaps. 



Species. Melusina formosa. 



Haeckel, System der Medusea. Seite, 535. 



Umbrella, flat disc-shaped, 3-4 times as broad as high. Mouth - 

 arms curtain-shaped, richly folded, longer than the diameter of 

 the Umbrella. Gonads richly folded, suspended sacks, nearly as 

 long as the Mouth-arms. Umbrella margin with 64 flaps, which 

 are divided from each other by deep incisions. The 32 ocular 

 flaps half as long as the 32 tentacular flaps. Tentacles numerous 

 and long. 



Size : Diameter of Umbrella, 100 mm. Height, 32 mm. 



Locality : Pacific coast of South America. Station 299, of the 

 " Challenger." W. Thomson. 



Family. FlosculiJu . 

 Discomedusse, with simple xmbranched narrow radial canals and 

 with a ring canal. With central mouth and mouth-arms at the 

 end of a mouth tube. 



