MONOGRAPH OF JAPANESE OPHIUROIDEA. 



141 



OpJtiomœris projecta Matsumoto. 



Ophiomœris projecta : Matsumoto, Proc. Acad. Nat. Sei. Philadelphia, 

 1915, p. 65. 



Two specimens ; off Uki-shima ; 300 fathoms. One specimen ; 

 Uji-shima, Osumi. 



Diameter of disk 4 mm. Length of arras 13 mm. Width of 

 arms at base 1.5 mm. 



Disk five-lobed, with concave interbrachial borders, with a 

 very regular rosette of the central, basal and radial plates, 

 surrounded by 

 the radial 



shields. Cen- 

 tral plate cir- 

 cular, rather 

 large. Eadials 

 rhomboidal, 

 considerably 

 larger than the 

 central plate, 

 separated from 

 each other by 

 the small and 

 oblong basais. 

 The radiais 

 may be in con- 

 tact with the 

 central plate, 

 or separated 



from it by one p^^ gg ophiomœris projecta. xlO. a. From above. b. From 



„„ +^^a■r\ XTPW below. c. Side view of three arm joints near disk. 



