MONOGRArH OF JAPANESE OPHIUEOIDEA. . 101 



Ophiambijc acideatus Lyman. 



OpJiiamhix aculealus : Lyman, Auniv. Mem, Boston Soc. Nat. Hist., 

 1880, p. 11, PI. n, figs. 29-31; Lyman, Rep. Challenger, V, 1882, p. 235, 

 PI. XXVn, figs. 10-12; Clark, Bull. Ü. S. Nat. Mus., LXXV, 1911, p. 

 114. 



Colnett Strait; 1,008 fathoms (Clark). 



Near Fiji Is.; 1,350 fathoms (Ly^ian). 



Ophiolimna Verrill, 1899, emend. 



Disk covered with fine granules, the radial shields being 

 usually concealed. Oral shields large, wide, separated from the 

 first lateral arm plates by the adorai shields. Oral angles more 

 or less granulated. Four to six oral papillœ, of which the outer- 

 most one is very large and operculiform. Arms slender, horizon- 

 tally flexible, ^''entrai arm plates wider than long, not in contact 

 with each other. Four to seven arm spines, long, glassy. Single 

 large, leaf-hke tentacle scale to each pore. 



This genus includes Ophiacantlia baircU Lyman, 1883 (referi'ed 

 to Ophiolimna by Vereill, 1899), Ophioconis antarctica Lyman, 

 1879, Op)hiaccmtha perfida Kœhler, 1904, Ophiolimna operculata 

 Kœhlek, 1907, Ophioconis diaslata Clark, 1911, papiUata C'Lk'SiK, 

 1911 and Ophiacantha lambda Clark, 1911. 



OphiochœtaÇ?) mixta Ly'man, 1878 (referred to Ophiolimna by 

 Verrill, 1899) and Ophiolimna liftoraUs Kœhler, 1912, are in my 

 opinion not genuine Ophiolimna, being different from it in the 

 more numerous oral papillœ, of which the outermost one is small 

 and stretches inwards above the next papilla ; in the well developed 

 ventral arm plates, which are fuUy in contact with each other ; 

 and in the presence of two tentacle scales, of which the abradial 



