32 LAND AND FRESH WATER MOLLUSKS 



23a 23* 23<: 



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

 magnified). 



Vertigo ovata Say. 



Vertigo ova/a 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 e.xcL). 



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. 



Ratige. — 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., ill, 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 CovLTi, Boston Journ. Nat. Hist., in, p. 402, pi. ill, fig. 23, 1840. 

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

 pi. XLll, figs. 10, 13. 1888. 



