Y. HANEDA 



343 



Fig. 3. Minute luminous fungi of the family Nidulariineae from Palao, Micro- 

 nesia ( X 54 ) . 



Noctiluca miliaris 



Noctiluca is one of the most remarkable luminous organisms, abun- 

 dant in Japanese waters throughout the year. Especially from April 

 to June large quantities of Noctiluca appear, and masses of them 

 floating on the sea are sometimes blown to shore by the wind. A mass 

 of Noctiluca can be several centimeters in thickness, making the sea 

 about it gelatinous and coloring the water a reddish brick. Japanese 



