292 THE SCYPHOMEDUS.E OP THE SOUTHERN HEMISPHERE, 



Armbush truncate, conic, extending laterally downward. Pro- 

 jecting a good deal beyond the margin of the Umbrella. Scapulets 

 with their upper margin in the level of the margin of the 

 Umbrella. 



Size : Diameter of Umbrella, 80 mm. Height, 40 mm. 



Locality : Galopagas Islands. Fuchs. 



Genus. Stomolophus. 



Pilemidse, with 8 pair of scapulets and dichotomous branched 



lower arms ; which coalesce in the greater part of the length of 



their sides. Only the terminal branches remain free. The coecal 



thick walled Manubrium extends beyond the first bifurcation of 



the arms. _ . , . , . .„ . 



bpecies. btomolopfius fritiUaria. 



Haeckel, System der Medusen. Seite, 598. Tafel, XXXV. 



Umbrella highly vaulted ; higher than semi-spherical. In 

 every Octant 24 stump rectangular velar flaps between two oval, 

 pointed protruding ocular flaps. Armbush stubbed conic extended 

 downward protruding beyond the margin of the lattei-, scarcely 

 \ of the height of the Umbrella. Scapulets hidden in the depth 

 of the Umbrella. 



Size : Breadth of Umbrella, 80 mm. Height, 60 mm. 



Locality : Atlantic Coast of South America. Surinam. 



Family. Chaunostomidce. 

 With a single sub-genital cavity, and a mouth in the lower side 

 of the brachial disc, with eight arms, the ventral side of which 

 contains a deep groove. Arms branched dichotomously. Secundary 

 and tertiary branches arranged somewhat pinnate, without 

 mai'ginal tentacles. 



Genus. Psetidorhiza. 



With one large filament at the bifurcation of the arm. 



The canal system consist of 16 radial canals, and a ring canal. 

 Centrifugally from the ring-canal we find an anostomosing net- 

 work of canals, whilst centripetally there are between two 

 adjacent main radial canals, 10 canals running from the ring- 

 canal in a radial direction centripetally. 



