152 VERTIGO OP JAPAN AND EASTERN ASIA. 



marked sinulus. The parietal lamella is strong and rather 

 long ; angular lamella small and short. The columellar lamella 

 is situated high, ascends inwardly, and is rather large and 

 massive. The two strong palatal folds are rather short and 

 near together. The basal fold is smaller, at the junction 

 of basal and columellar margins. There is a low supra- 

 palatal nodule. The palatal and basal folds are united by 

 a strong buff callus. The outer lip is strongly biarcuate, a 

 little expanded, the columellar margin being rather widely 

 reflected. 



Length 2.15, diam. 1.4 mm.; nearly 5 whorls. 



Japan: Akkeshi, Kushiro, Yesso (Y. Hirase). Type and 

 paratypes no. 87899 A. N. S. P., from no. 1307 Hirase coll. 

 Also Kashima, Harima (Hirase). 



I formerly identified these specimens with V. hydrophila, 

 but they differ by the larger size, paler color, by the develop- 

 ment of a suprapalatal fold, and by the shape, if Reinhardt's 

 figures are correct. Possibly a comparison of specimens may 

 show that it is a subspecies of V. hydrophila. It has some 

 resemblance to V. pygmaea. 



A race from Kashima, Harima, in central Japan, differs by 

 the less swollen spire and the very small size of the basal 

 fold. Length 2.05, diam. 1.3 mm. (Fig. 3). 



35. VERTIGO HYDROPHILA (Reinh.). PL 14, figs. 4, 5. 



Shell dextral, ovate, rimate, glossy, glabrous, striatulate un- 

 der the lens, corneous, pellucid; spire conic, obtuse; 4 1 / 

 slightly convex whorls, rapidly increasing, the penult large, 

 the last rounded, not compressed at the base. Aperture trans- 

 versely cordate, 5 to 6 dentate : a strong parietal lamella and 

 another [angular] obsolete; 2 columellars, the upper one 

 stronger; 2 palatals. The palatal and columellar teeth are 

 united by a glossy, ivory-like callus, which appears rufous 

 externally. Peristome acute, a little expanded, the margins 

 remote, joined by a thin callus, the right margin a little 

 produced and bent inward, the columellar margin a little 

 reflected. Length 1.75, diam. 1 mm. (Reinhardt). 



Japan: Hakodate, Yesso (Dr. Hilgendorf). 



