MONOGKAPH OF JAPANESE OPHIUKOIDEA. 



223 



Sagaini Sea. Numerous specimens ; off Uki-shima, Uraga Channel. 

 One specimen ; Kominato, Bôshii. 



A 



Osliima (Claek). 



The disk scales become almost visible on drying, and there 



are four or five 





rows of them in 

 each interradial 

 space on the 

 dorsal side. In 

 many specimens 

 and especially in 

 younger ones, a 

 small, circular, 

 depressed cen- 

 tral plate is 

 visible. The 



dorsal surface 

 of the disk is 

 usually covered 

 with thornv 



spines and spiny 

 tubercles, but 

 sometimes with 

 only one of the 

 two forms. The 

 arm spines are 



very slender, and often not much flared laterally. The present 

 species appears to reseml^le 0. galapacjensis Lütken & Mortensen 

 in certain points. 



Fig. 60. Opkiothrix eiisteira. xl3. a. From above. 

 low. c. Side view of two arm joints near disk. 



h. From be- 



