306 



ART. 2. — H. MATSUMOTO: 



Key to Japanese species of Oi?hioleuce. 



yi— Dorsal side of disk, including the radial shields, closely covered 

 with granules ; oral shields longer than wide ; outermost oral papilla 

 not especial!}' large; arm spines more than half as long as the 



corresponding arm joint char i schema. 



AA — Eadial shields, as well as the larger disk scales, paiiially free of 

 granules ; oinl shields wider than long ; outermost oral j)apilla very 

 large and operculiform ; arm spines less than half as long as the 

 corresponding arm joint hrevispinum. 



_„;:/l!;^!-jj. 





Ophioleuce charischema (Of^akk). 

 Ophiocten charischema : Clark, Bull. U. S. Nat. Mus., LXXV, 1911, p. 

 97, fig. 35. 



Numerous specimens ; Mera-out-Oisegaké, Sagami Sea ; 300 

 fathoms. 



Eastern Sea; 95-152 fathoms (Claek). Off Honshii ; 63 



fathoms (Claek). 



In my specimens, several 

 spines are present on the disk, 

 mingled with granules ; they 

 fall off easily on rubbing. The 

 smaller specimens have the 

 dorsal disk plates and radial 

 shields partially naked. 



Ophioleuce hrevispinum 



(Clark). 



Fig. 85. Ophioleuce charischema xO. 

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

 view of four arm joints near disk. 



Ophiocten hrevispinum : Clark, 

 Bull. U. S. Nat. Mus., LXXV, 1911, 

 p. 98, fig. 86. 



