MONOGIiArH OF JAPANESE OPHIUROIDEA. 



183 



Sagami Sea ; 202-622 fathoms (Claek). Off Ose Zaki, Suruga 

 Gulf ; r)5-()') fathoms (Claek)- Off eastern Japan ; 440 fathoms 

 (ClaeiO. 



(fl>h loph vagin us japoniciis Matsumoto. 



Ojjhiop/i ragmvs jcrponivvs : jNIatsumoïo, Proc. Acad. Nat, Sei. Philadel- 

 phia, 1915, p. 70. 



Numerous specimens ; off Namami, Kagoshima Bay ; 8-15 

 fathoms. Two specimens ; Enoura, Suruga. Numerous specimens ; 

 off Oginohama, Eikuzen ; 10-20 fathoms. 



Diameter of disk 7 ram. Length of arms 45 mm. Width of 

 arms at base 1 mm. 



Disk five-lobed, with very convex interbrachial borders, covered 

 with very fine, imbricating 

 scales, ^ix primary plates more 

 or less distinguishal)le at the 

 central region. Iladial shields 

 semilunar, one-third as long as 

 the disk radius, twice as long- 

 as wide, separated ovlIj at the 

 proximal end, oljtusely pointed 

 within. A row of large and 

 squarish marginal scales occurs 

 on the disk. The scales of tlie 

 interbrachial ventral surfaces 

 just outside the marginal scales 

 are turned up, so as to form a 

 sort of fence. The marginal 

 scales are more; elevated than 



Fig. 48. Op/ilnphraijmvs japonlruf;. 



a. From above, h. Erom below, c. Side 

 view of three arm joints near disk. 



