102 VERTIGO. 



The coliimellar about as large as parietal. The basal rather 

 small and quite near the posterior end of columella. The two 

 palatal teeth or lamellae well developed which are not smaller 

 than either parietal or columellar, although they are of com- 

 paratively slender ridges. The upper one of the palatal teeth 

 situated on the inner side of the concavity of the outer lip 

 looking slightly thicker than the lower one. Outer and inner 

 lips slightly thick, simple and smooth, with a little tendency 

 of being expanded. Umbilicus very narrow. 



''The apex and second whorl are grayish white, the rest of 

 the shell is rufous brown, and the aperture, apertural teeth 

 and the peristomal region pale or whitish. When the shells 

 are comparative worn, the surface is almost uniformly grayish 

 white" (Ping and Yew). 



Alt. 2.2 mm., diam. 1.2 mm., length of aperture 0.5 mm., 

 width of aperture 0.75 mm. 



N. W. China : Aksu, in a dry river bed. Type No. 545 Fan 

 Mem. Inst. Biol. 



Vertigo teilhardi Ping and Yen, Bull. Fan Memorial In- 

 stitute of Biology, vol. 4, p. 277, fig. 14; March 15, 1933. 



" This species resembles in some respects Vertigo eogea 

 Pilsbry, 1919, described from Kashima, Harima of central 

 Japan. The present species is, however, differentiated from 

 the latter by its less broad outline, its palatal and basal teeth 

 separated from each other without ' a strong buff callus', and 

 its slightly larger size, with but one volution less" {Ping 

 and Ye7i). 



European Species. 



Vertigo pusilla godetiana Piaget. 



Shell normal except that the peristome is thinner, subcon- 

 tinuous, the right margin not arched in, the parietal wall one- 

 toothed. Length 1.5 mm., diam. 1 mm. (Piaget). 



Switzerland: Pierrabot (Godet) ; Quaternary sandy alluvial 

 deposit in front of Champion (Gampelen), near the road to 

 Infini. 



