EUROPEAN SPECIES OF VERTIGO. 187 



62. VERTIGO INERMIS (Westerlund). 



Shell umbilical e-perf orate, ovate, very finely striate, glossy, 

 reddish , horn-color, obtuse at apex. Whorls 5, convex, the 

 penult (viewed from the right side) half as high in front as 

 behind, the last double as high in front as behind on account 

 of the deep suture strongly ascending, to the aperture; last 

 whorl nearly horizontal at the base, almost equally as wide as 

 the penult. Aperture distinctly lateral, oval, narrowed to- 

 wards the base, toothless; margin very weakly lipped within, 

 a broad, thin deposit of callus between the margins. Length 

 2, diam. 1% mm. (West.). 



Siberia: north of Seliwarinskoje, about 70 N. Lat. 



Pupa inermis WESTERLUND, Siberiens Land- och Sotvatten- 

 Mollusker, in Kongl. Sv. Vet. Akad. Handlingar, xiv, no. 12, 

 1877, p. 103 ; Fauna iii, 1887, p. 130. Vertigo inermis WEST., 

 Synopsis, 1897, p. 115. 



63. VERTIGO DIC^A (Westerlund). 



Shell cylindric-ovate, seen to be densely striatulate under 

 a strong lens, yellowish corneous. Whorls regularly increas- 

 ing, a little convex, separated by a rather deep, oblique suture, 

 ascending below, back of the last whorl obliquely flattened a 

 little, strongly constricted, dilated on both sides in front. 

 Aperture semiovate, toothless, parietal wall oblique, outer mar- 

 gin regularly arcuate, columella dilated, spreading. Length, 

 1%, diam. 1% mm. (Westerl.). 



Sweden : Dalbyo, Sodermanland. 



Pupa diccza WEST., Acta Soc. pro Fauna et Flora Fennica, 

 xiii, 1897, no. 7, p. 64. 



64. VERTIGO CELATA (Westerlund). 



Shell perforate, cylindric-conic, apex obtusely conic ; densely 

 striatulate rufous-corneous. Whorls 6i/2> slowly increasing, 

 very convex, or swollen-convex, separated by a deep suture 

 which is subhorizontal throughout, penult and antepenult 

 whorls equal, the last scarcely or slightly larger, rotund at 

 base. Aperture small, semioval, wholly toothless. Peristome 



