MONOGROrH OF JAPANESE OPHIUROIDEA. 1G3 



fathoms (Clark). Off Kii ; 244-649 fathoms (Clark). Off southern 

 Hokkaido; 175-349 fathoms (Clark). Off Korea, Sea of Japan; 

 163 fathoms (Clark). Sea of Japan; 59-428 fathoms (Clark). 

 G-ulf of Tartaiy; 318 fathoms (Clark). Off Saghahn ; 21-32 

 fathoms (Clark). Okhotsk Sea; 64-100 fathoms (Clark), Yezo 

 Strait; 86 fathoms (Clark). Off Simushir Is.; 229 fathoms 

 (Ciark). 



Bering Sea. Alaska. Kamchatka. 



Ophiopholis hrachy actis Claek. 



O'pUopliolis hrachyactis : Clark, Bull. U. 8. Nat. Mus., LXXV, 1911, p. 

 117, fig. 44. 



Numerous specimens ; off Misaki. Numerous specimens ; off 

 Uki-shima, Uraga Channel. One specimen, attached to Sijncdlactes 

 ishikawai Mitsukuri ; Albatross station 5092. 



Off Ando Zaki; 79 fathoms (Clark). Off Kii; 191 fathoms 

 (Clark). Uraga Channel ; 88-197 fathoms (Clark). Off Manazuru 

 Zaki, Sagami Sea; 153 fathoms (Clark). Suruga Gulf; 108-131 

 fathoms (Clark). Eastern Sea; 103-361 fathoms (Clark). 



The largest of these specimens is 11 mm. in the disk diameter 

 and 66 mm. in the arm length ; a medium-sized one is 9 mm. in 

 the disk diameter and 34 mm. in the arm length ; and the smallest 

 4 mm. in the disk diameter and 15mm. in the arm length. Thus, 

 the arms are in none of my specimens so short as Clark states, and 

 indeed in the first specimen, they are about six times as long as 

 the disk diameter. It appears to me that this species almost 

 passes on into 0. aculeata var. japonica. Some specimens of the 

 latter, especially of Misaki and vicinity, frequently lack the disk 

 spines and are less granulated on the disk, so that they look 



