MONOGKArH OF JAPANESE OPHIUROIDEA. 



205 



The tentacle scale is oval and leaf-like, but relatively smaller 

 than in the next species. 



Ainplihira Irldoides, sp. nov. 



-AmpJmira cjlahra : Maektanner-Tl'RNERETSCHER, Ann. K. K. Naturh. 

 Hofmus., II, 1887, p. 300. (Non Lyman, 1879.) 



Twelve specimens ; Mera-out-Oisegaké, Sagami Sea ; 300 fathoms. 



Diameter of disk 4 mm. Length of arms 20 mm. . Width of 

 arms at base 0.9 mm. 



Disk subpentagonal, with more or less straight interbrachial 

 borders, covered with rather fine, imbricating scales, which are 

 finer outwards than inwards. Six primaries prominent, distinctly 

 larger than the other scales. Radial sMelds rather large, pear- 

 seed-shaped, about two-fifths as long as the disk radius, two and 

 a half to three times as long as wide, widest at about one -third 

 of the entire length from the outer end, entirely separated from 

 each other, divergent. Interbrachial ventral surfaces covered also 

 with fine, imbricating scales, which are finer than those of the 

 dorsal side. Genital slits long, extending from the oral shields to 

 the disk border. 



Oral shields small, rhomboidal, with obtuse inner and rounded 



