SOME MEDUSiE OF JAPANESE WATERS. 9 



The sexual gland is represented by eight leaf-shaped out- 

 growths from the interradial cathamma into the radial pouches. 

 The gland extends from the root of the pedalia to the upper 

 corner of umbrella. 



In specimens newly preserved in formalin, the umbrella is 

 tinged with a light greenish color, and the margin of the granules 

 on exumbrella near the umbrella-margin are brownish. The 

 tentacles are beautifully greenish at the proximal end, and pink- 

 ish in the remaining distal parts. How^ever, in half-grown 

 examples the tentacles are entirely pinkish. 



The largest specimen examined measures 100 mm. high and 

 60 mm. broad. This species was collected by Dr. I. Ikeda and 

 Mr. Y. Sakai in the Inland Sea, off Kogoshima and off Innoshima. 



This species is known among fishermen as " hikurage," which 

 means fire medusa or inflaming medusa, so named from the fiery 

 sting;. Found in autumn and winter. 



'Ö' 



Discomedusae. 

 Semostomae. 



Generally the oral arms are more or less convoluted, thus 

 constricting the oral aperture to a great degree. 



Pelagidae. 

 Pelagia panopyrat Péron et Lesueiir. 



The umbrella is about half as high as broad. Its gelatinous 

 substance is thick in the centre. The exumbrella is covered with 

 many rounded protuberances or nematocysts which become general- 

 ly elongated and much crowded in the marginal parts. The 

 sixteen marginal lobes are similar in size and form, broader than 



