156 VERTIGO OF JAPAN AND EASTERN ASIA. 



palatal plicae well developed, the lower one somewhat more 

 immersed. No palatal callus. The outer lip is biarcuate, 

 a conspicuous entering angle at the junction of the arcs ; edge 

 blunt and expanded. Length 1.65 diam. 0.95 mm.; 5 whorls. 



Japan : Ikusagawa, Ojima, Y. Hirase. Type and paratypes 

 no. 85746 A. N. S. P. 



Vertigo japonica PILSBRY & HIRASE, Nautilus xvii, Feb., 

 1904, p. 118. 



It differs from V. hirasei by the entering point of the outer 

 lip ; from V. hijdrophUa by the same character and by having 

 fewer teeth. 



39o. Vertigo jap&nica coreana n. subsp. PL 15, fig. 4. 



Differs from V. japonica by the decidedly longer lower 

 palatal fold. Length 1.53, diam. 0.9 mm. 



Korea: Island of Ko-je, Y. Hirase. Type and paratypes 

 no. 95772 A. N. S. P. 



Some "dead" specimens from Fusaii, Korea, partly young 

 and all more or less broken, look like V. japonica, but their 

 identity is not certain. 



39&. Vertigo japonica tosana n. subsp. PI. 15, fig. 3. 



The shell is distinctly striate ; there is a low angular lamella ; 

 other teeth as in V. japonica. Length 1.65, diam. 0.95 mm. 



Japan : Irazuyama, Tosa, Y. Hirase. Type no. 86486 A. 

 N. S. P. 



40. VERTIGO DENUDATA (Mousson). PI. 15, fig. 8. 



Shell very minute, perforate, long-ovate, denuded of epi- 

 dermis, smoothish, slightly striatulate, subopaque, whitish. 

 Spire convex, rather obtuse at summit; suture impressed. 

 Whorl 5y 2 to 6, convex, the penult a little larger, the last 

 whorl somewhat tapering, not compressed below. Aperture 

 nearly vertical, semicircular; peristome acute, a little re- 

 flected, bordered by a wrinkle outside ; margins connected ; 

 outer margin curved at the insertion, almost forming a right 

 angle. Within there are two distant parietal teeth, one 

 columellar and one palatal, sometimes a second small one being 



