182 . AET, 2. — H. MATSUMOTO : 



Key to Japanese species of Aniphiodia. 



A — Radial shields fully in contact in pairs ; ventral arm plates 

 pentagonal, as wide as, or wider than, long ; four arm spines ; two 



tentacle scales crater odometa. 



AA — Eadial shields divergent, slightly or not at all in contact in pairs ; 

 ventral arm plates quadrangular, longer than wide ; outer two oral 

 papillae pointed ; tentacle scales very rudimentary. 

 a — Interbrachial ventral surfaces finely squamated ; four or five arm 



spines ; one or two rudimentary tentacle scales euraspis. 



aa — Interbrachial ventral surfaces covered by a naked skin ; four or five 

 arm spines ; single rudimentary tentacle scale to each pore. .psUocliora. 



AtnplHoäia craterodo^neta Clakk. 



AmpModia craierodometa : Clark, Bull, U. S. Nat. Mus., LXXV, 1911 

 p. 155, fig. 65. 



Yezo Strait; 533 fathoms (Claek). Okhotsk Sea; 58-69 

 fathoms (Claek). Off Saglialin ; 21-32 fathoms (Claek). Gulf of 

 Tartaiy ; 318 fathoms (Claek). Off Korea ; 116 fathoms (Claek). 



Alaska (Claek). Bering Sea (Claek). Arctic Ocean (Claek). 



Aniphiodia euraspis Clark, 



Ampln'odia eurasjyis : Clark, Bull U. S. Nat. Mus , LXXV, 1911, p. 

 158, fig. 67. 



Sm^uga Gulf; 211-293 fathoms (Claek). Off Korea ; 184-250 

 fathoms (Claek). Gulf of Tartary;"318 fathoms (Claek). 



Bering Sea (Claek). California (Claek). 



Ainphiodia psilochora Clark, 



Ampldodia p&ihcJiora : Clapj;, Bull. U. S. Nat. Mus., LXXY, 1911, p. 

 165, fig. 72. 



