482 HIROSHI OHSHIMA : THE SYNAPTIC OF JAPAN. 



more southern regions. Noteworthy is the fact that such an arctic 

 form occurs in Sagami Sea (lat. 35 N.). 



22. Myriotrochus minutus Östergren. 



Myriotrochus minutus Ostergren, Zwei koreanische Holothurien, 

 1905, pp. 194-196, fig. iA.- — Clark, The Apodous Holothurians, 1907, 

 p. 129. 



Since the original specimen of this species was obtained off the 

 coast of Korea, no second specimen seems to have been captured. 



23. Myriotrochus mitsukurii Ohshima. 



Myriotrochus mitsukurii Ohshima, Albatross Holothurians (m.s.). 

 This interesting species, bearing some relationship to Acantliotro- 

 c/ius, is known only from off the west coast of Hokkaido. 



Zoological Institute, Science College. 



March ist, 1914. 



