32 LAND AND FRESH WATER MOLLUSKS 



23a 23* 23c 



Fig. 23. Vertigo ovata, showing variations in teeth of aperture (all figures 

 magnified). 



Vertigo ovata Say. 



Vertigo ovata Say, Journ. Acad. Nat. Sci. Phila., 11, p. 375, 1822. — Morse, 

 Am. Nat., i, p. 668, figs. 57, 58, 1868. — Binney, Land and Fw, Sh. N. 

 Am., I, p. 252, figs. 442-445, 1869 (syn. in part excl.). 



Range. — Eastern United States from Maine to Texas, and north- 

 ward. Mexico.'' 



Ungava Bay, Labrador ! Victoria, British Columbia ! St. Paul, 

 Kadiak Island ! Alaska ; Tigalda Island, Aleutian chain ! Laggan, 

 Alberta ; Manitoba. 



Vertigo arctica Wallenberg. 



Pupa arctica Wallenberg, Mai. Blatt, v, pp. 32, 99, pi. i, figs. 3, a-c, 4, 

 1858. — Reinhardt, Sitz-ber. Ges. Naturf. Fr. zu Berlin, No. 3, 1883, 

 p. 38. 



Range. — Lapland and northern Scandinavia, the mountains of 



Germany and the Tyrol ; eastern Siberia at Emma Harbor, Plover 



Bay ; Port Clarence on the American side of Bering Strait (Vega 



Expd.) . 



* Vertigo krauseana Reinhardt. 



Vertigo krauseana Reinhardt, Sitz-ber. Ges. Naturf. Fr. zu Berlin, No. 3, 

 1883, p. 38. — Westerlund, Fauna Pal. Reg., iii, p. 131, 1887. 



Range. — Chukchi Peninsula of eastern Siberia; at Poot, St. Law^- 

 rence Bay, and Ratmanof Harbor. Alaska, at Chilkat Inlet ! 



Specimens of this species labeled Chilkat Inlet were received from 

 Dr. Krause ; but in the publications on this form only the Siberian 

 habitats are given. I suspect some error has occurred in labeling, 

 though it is entirely possible that the species may occur in Arctic 

 America. 



♦Vertigo (Vertilla) milium Gould. 



Pupa vtiliumGovLT), Boston Journ. Nat. Hist., ill, p. 402, pi. III, fig. 23, 1840. 

 Vertigo {Angustula) milium Sterki, Proc. U. S. Nat. Mus,, XI, pp. 377-8, 

 pi. xlii, figs. 10, 13, 1888. 



