BY DR. R. VON LENDENFELD. 165 



Locality : Antarctic Ocean, S.E. of Kerguelen. Lat. S. 64° 

 37'. Long., E. of Greenwich, 85° 49'. Station 154 of the 

 " Challenger." Wyville Thomson. 



2. Gen. Tesserantha. Haeckel, 1879. 



Tesseridee without Ujnbrella stalk, with Exumbrellar process ; 

 with 16 simple, not hollow tentacles, without terminal nettle knot. 



2. sp. Tesserantha connectens. Haeckel, 1879. 



Haeckel, Tiefsee Meclusen der " Challenger" Expedition. Seite 

 42. Tafel. XV. 



Umbrella helmet shaped, 1^- as high as broad, above with conic 

 process with canal. Four double rows of gastral filaments. 

 Mouth tube quadrangular, prismatic, half as long as the height of 

 the Umbrella. Mouth with four folded laps. Four simple hoof 

 shaped Gonads. The arch surrounds the knots. The eight 

 tentacles of the same length as long as the height of the Umbrella • 



Size : "Width of Umbrella, 6 mm. , height of Umbrella, 9 mm. 



Locality : South-eastern part of the Pacific Ocean, near Juan 

 Fernandez. 



Lat. S. 33° 31'. Long, W. Greenwich, 74° 43'. Station, 

 299 of the " Challenger," in a depth of 2,160 fathoms. Wyville 

 Thomson. 



2. Family. Lucemaridoz. Johnston, 1847. 



Margin of Umbrella simple, undivided, without hollow arms or 

 margin-laps, with simple tentacles. On the Exumbrella a pro- 

 longation, with which the Medusa affixes itself to foreign bodies. 



3. Gen. Craterolophus. Clark, 1863. 



Lucernarid^e, with four Mesogon pouches in the wall of the 

 Subumbrella, without marginal anchors or papilla?. 



3. Sp. Craterolophus macrocystis. R. von Lendenfeld, 1884. 

 Nova species. 

 The genus Craterolophus has only been found on the coast of 

 Heligoland, where the hitherto single species Craterolophus Tethys, 



