SOME MEDUSA. OF JAPANESE WATERS. 



iS^ 



Neopelagia eximia. 

 1 natural size. 



cavity, but there are four -p- -, 



J: 1q. J.. 



subgenital depressions con- 

 tinuous with the interradial 

 grooves on the sides of oral 

 tube. 



The genital glands are 

 light red, the margin of oral 

 arms violet colored; neraato- 

 cysts on oral tube and 

 tentacles also violet colored. 

 The interradial inner wall 

 of oral tube is yellowish. 

 All other parts are colorless 

 and transparent. 



This remarkable form was collected at Misaki in November 

 1908. It measures about 90 mm. in the diameter of umbrella. 

 The form lacks radial symmetry. In each of two quadrants, w^e 

 count eight marginal lobes, four sensory clubs and four tentacles. 

 These numbers seem to be normal. In the third quadrant, we 

 find only four marginal lobes, two sensory clubs and two tentacles. 

 These numbers should be those of the immature stage. In the 

 fourth quadrant there are six marginal lobes, two sensory clubs 

 and three tentacles. It seems that in this quadrant two marginal 

 lobes and one tentacle w^ere added by intercalation. 



At first I was inclined to refer this form to the genus San- 

 deria ; but from the extraordinary position of tentacles, I have 

 come to think it proper to institute a new genus for the recep- 

 tion of this remarkable medusa. 



The medusa was accompanied by an immature fish, belonging 

 to the genus Psenes, the same species as that caught together 



