MONOGEArH OF JAPANESE OPHIÜROIDEA. 155 



Kagosliima Gulf; 58 fathoms (Clark). 



The largest one of ray specimens measures only 2 mm. across 

 the disk and 10 mm. in the arm length. In some arm joints, the 

 uppermost one of the three arm spines is longer than the middle 

 one, which is usually the longest. The colour in alcohol of these 

 specimens is not gray, but light green. 



Ophiactis ajfi,nis Duncan. 



OpMadis affinis : Duncan, Journ. Linn. Soc. London, Xr\^ 1879, p. 

 469, PI. X, fig. 23, PL XI, fig. 24; Lyman, Ptep. ChaUenger, V, 1882, p. 

 115 ; Kœhlee, BuU. Sei. Fr. Belg., XXXI, 1898, p. 71 ; Kœhleiî, Res. Exp. 

 Siboga, XLY, Pt. 2, 1905, p. 26. 



Korean seas (Duncan). 



Indian Ocean and Malaysian waters (Kœhlee). 



Ophiactis macrolepidota Marktanner. 



Ophiactis macrolepidota : Marktanner-Turneretscher, Ann. K. K. 

 Naturliist. Hofmus. Wien, H, 1887, p. 298, PI. Xn, figs. 12 & 13 ; Döder- 

 LEiN, Denkschi'. Med. Nat. Ges. Jena, YIEI, 1898, p. 484, PI. XXXVH, 

 figs. 1 & la. 



One specimen ; Uraga Channel. Three specimens ; Asami Bay, 

 Tsushima. 



Sidney (Maektanner-Tueneretschee). Amboina (Dödeelein). 



The specimens at hand were all found adhering to Ophiothrix 

 koreana. The largest one is 1.8 mm. in the disk diameter and 

 7 mm. in the arm length. Unlike Maektanner-Turneretscher's 

 type, imbricating scales are visible in the interbrachial ventral 

 surfaces in all the specimens. The disk is yellowish and the arms 

 are light greenish above and light yellowish below in alcohol. 



