MONOGIL\PH or JAPANESE OPHIUEOIDEA. 19 



mention the size of his type specimen ; but judging from the 

 magnification of his figures, his specimen must have been much 

 smaller than Lütken à Moetensen's type. The smaller specimens 

 in my hands appear to me to correspond well to Duncan's descrip- 

 tion and figures, the only essential difference being the shape of 

 the oral shield, which is lyre-shaped and very wide outwards in 

 Duncan's figure. But the oral shields, adorai shields and oral 

 papilloe, &c. of A, dlomedece are subject to great variation, as 

 stated by Lütken & Mortensen. Therefore, I am inclined to look 

 upon A. korece and A. dlomedece to be conspecific, the former 

 having the priority. 



In the specimens at hand, the arms are mostly four to six 

 times as long as the disk diameter, so that they are usually 

 longer than in Duncan's and Kœhler's specimens, but usually 

 shorter than in Lütken & Mortensen's. In some of the oral 

 angles, there may be one to three additional infradental papilla) 

 besides the ordinary pair. The disk is usually light bluish and 

 the arms yellowish or light brownish in colour in alcohol. 



Amphiura digitula (Claek). 



AmpUodia digitula : Claek, Bull. U. S. Nat. Mus., LXXV, 1911, p. 

 162, fig. 70. 



Four specimens ; Mera-out-Oisegaké, Sagami Sea ; 300 fathoms. 



Off Ose Zaki, Suruga Gulf; 45-48 fathoms (Clark). Sea of 

 Japan ; 70 fathoms (Clark). 



In my opinion, the present species is evidently referable to 

 Amphiura s. str., though Clark refers it to Amphiodia. The 

 distal oral papillse are usually two in number on either side, both 

 arising from the adorai shield. In some cases, there are three 



