32 ART. 9. K. KISHINOUYE : 



and nuraber eight (four perradiul and four iuterradial). Tliere 

 are only four otocysts. The manubiium is nearly tubular. 

 This species is found at Misaki in winter. 



Narcomedusae. 



iEginidse, 



JEgina pentaneniaf n. sp. - 



(PI. Y, Fig. 34.) 



The umbrella is disc-shaped with flat top and nearly vertical 

 sides. It is nearly twice as broad as high. The jelly of the 

 umbrella is tough and very thick at the centre. The mouth is 

 simple and round, opening at the end of the conical oesophagus. 

 The ten genital sacs are nearly quadrate. The five tentacles are 

 nearly twice as long as the radius of umbrella. 



The medusa measures about 20 mm. in breadth, and 10 mm. 

 in height. 



Collected at Misaki and in the Bay of Suruga in spring and 

 winter. 



Tokyo, June 3, 1909. 



