172 OPE AS, JAPAN. 



has about the same size and sculpture. It is slightly more 

 distinctly striate than 0. mauritianum var. prestoni. 0. gra- 

 cile is much more strongly striate. While there would seem 

 to be enough Chinese species described to satisfy anybody, 

 still I can find none agreeing well with these shells. The 

 Soochow specimens are more slender, length 8.5, diam. 2.5 

 mm., with 8 whorls. 



VIII. Japanese Species. 



Besides the species described below 0. gracile occurs in the 

 southern islands of the Japanese Empire. 0. javanicum has 

 been found by von Martens at Tokyo; and A. Adams has 

 reported 0. fortunei and 0. juncea. The identity of the 

 latter two is doubtful. Nevill reports a Stenogyra (Opeas) 

 dubia A. Ad. from Japan (Handlist Ind. Mus., i, 164), but 

 it is undescribed. 



69. 0. SATSUMENSE n. sp. PI. 18, figs. 8, 9. 



The shell is imperforate or nearly so, turrite-conic with 

 straight lateral outlines, thin, greenish-corneous, subtranslu- 

 cent. The surface has a moderate gloss, and is rather weakly 

 and very irregularly striate, there being rather coarse, low 

 wave-like wrinkles with narrower ripples over and among 

 them, all strongly arcuate; the base is much smoother. 

 Whorls 7!/2, much flattened, especially the later ones. Suture 

 narrow and well impressed. The aperture is narrow and 

 piriform, the outer lip thin, arched forward above, the basal 

 margin retracted. Columella straight and vertical, not reach- 

 ing the base, the margin below it bending to the left and re- 

 tracted; columellar margin is reflexed and closely adnate in 

 adults, a very narrow perforation existing in the young. 



Length 9.8, diam. 3.3, aperture 3.8 mm. 



Japan: Kaimonzan, Satsuma (Y. Hirase). 



A much more conic shell than 0. gracile, and less sharply, 

 less regularly striate. The excised base of the columella 

 reminds one of 0. javanicum and its allies, which however 

 are not otherwise closely related. 0. kyotoense differs by its 

 distinct perforation and the shape of the aperture. 



