102 ART. 2. — H. MA.TSUMOTO : 



one overlaps the base of the lowest arm spine. (See under 

 Ophiodermcdiclce.) 



ILty to Japanese species of OpJnolimna, 



A — Eadial shields entirely covered over, 



a — Disk granules very fine ; four to five arm spines rather blunt, some- 

 what longer than the corresponding arm joint diastata. 



aa — Disk granules coarse, mingled with some scattered spines ; seven 

 acute arm spines, longer ones about thrice as long as the corres- 

 ponding arm joint hairdi. 



AA — Kadial shields partially naked ; disk granules coarse and elongated ; 

 five acute arm spines, of which the uppermost is the longest and 

 about thrice as long as the corresponding arm joint ........ lambda. 



O^yhiolhnna diastata (Clark). 



OjoMoconis diastata : Clark, Bull. U. S. Nat. Mus., LXXY, p. 27, fig. 3. 

 Off Shio Misald ; 244-253 fathoms (Claek). 



Ophiolimna hairdi (Lyman). 



Opldacantha hairdi : Lyman, Bull. Mus. Comp. Zool., X, 1883, p. 256, 

 PI. V, figs. 70-72; Lütken & Mortensen, Mem. Mus. Comp. Zool., XXIII, 

 1899, p. 177, PL Yni, figs. 9-13; Clark, Bull. U. S. Nat. Mus., LXXY, 

 1911, p. 230. 



Ophiolimna hairdi : Yerrill, Bull. Labor, Nat. Hist. State Univ. Iowa, 

 Y, No. 7, 1899, p. 41^^; Yerrill, Transact. Connecticut Acad., X, 1899, p. 

 345. 



Off Mikawa, Yenshii Sea ; 943 fathoms (Claek). 



Bering Sea. Alaska. Washington. Gulf of Panama. Caribbean 

 Sea. Eastern Atlantic. 



1) This paper 'was not seen by me. 



