32 



LAND AND FRESH WATER MOLLUSKS 



23a 233 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., 1, p. 668, figs. 57, 58, 1868. — Binney, Land and Fw. Sh. N. 

 Am., 1, 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. 1, 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., in, 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 milium Gould, Boston Journ. Nat. Hist., in, p. 402, pi. ill, fig. 23, 1840. 

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

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



