MONOGRAPH OF JAPANESE OPHIÜEOlüEA. 203 



Amplnura aerystata Claek. 



AmpJinira aerystata : Clapjv, Bull. U. S. Nat. Mus., LXXV, 1911, p. 

 145, fig. 58. 



Numerous specimens ; Okinosé (a submarine bank), Sagami 

 Sea ; 85 fathoms. 



Off Tsurugi Zaki ; 110-259 fathoms (Claiik). Off Kii ; 191 

 fathoms (Claek). Sea of Japan; 59 fathoms (Clapjv). Southwards 

 from Hokkaido ; 269-4G4 fathoms (Clark). 



California ; 8-33 fathoms (Claek). 



In the larger specimens, the disk coverings remind us of those 

 of the Ophionephthys-tyYjQ, the tentacle scales being however well 

 developed. This species may be brought forward to prove the 

 small taxonomic value of the reduction of the disk scales, which 

 is the character separating Ophicnephthys from Amphiura. 



Atnpthiura acacia Lyblyn. 



AmpMura acacia : Lymax, Bull. Mus. Comp. Zool., VI, Ft. 2, 1879, p. 

 21, PI. XI, figs. -292-294 ; Lyman, Rep. Challenger, V, 1882, p 130, PL 

 XVI, figs. 15-17. 



Yenshû Sea ; 565 fathoms (Lyman). 



AmpJiiura pycnostonia Clark. 



AmjMura pycnostoma : Claex, Bull. U. S. Nat. Mus., LXXV, 1911, p. 

 151, figs. 62. 



Off Kii, Kumano Sea ; 440 fathoms (Claek). 



Ampjliiura carcliara Clark. 



Amphiura carcliara : Clark, Bull. U. S. Nat. Mus., LXXV, 1911, p. 

 142, fig. 55. 



Sagami Sea; 614 fathoms (Claek). 



