30 LAND AND FRESH WATER MOLLUSKS 



Range. — North America from New England to California and 

 northward. Loess of Iowa. 



Ungava, Labrador ! Lake Superior region ; Laggan, Alberta ; in 

 British Columbia at Nanaimo and Victoria ; in Alaska at Killisnoo, 

 Chilkat and Chilkoot valleys, Pyramid Island, Portage Bay, Dyea, 

 Klukwan, Point Romanof at the Yukon delta ; St. George Island ! 

 St. Paul Island ! Unalaska ! Rooluk Island, Unalga Pass ! Akutan 

 Island ! Popof Island, Shumagins ! St. Paul, Kadiak Island ! Orca, 

 Prince William Sound ! Yakutat Bay ! Berg Inlet, Glacier Bay ! Muir 

 Inlet ! 



This is the most abundant and widely distributed species in 

 the north country. I have very little doubt that V. borealis More- 

 let, from Kamchatka and Bering Island, is merely a variety of this 

 species. 



Vertigo Columbiana Sterki. 



Vertigo columbiana (Sterki MS.) Pilsbry, Proc. Acad. Nat. Sci. Phila., for 

 1900, p. 602, pi. xxiii, fig. II, Sept., 1900. 



Range. — Douglas County, Oregon, and northward to Washington, 

 Vancouver Island, and St. Paul Island, Bering Sea ! 



Resembles V. gouldii but wants the basal fold. A variety occurs in 

 Utah. The St. Paul specimen was identified by Dr. Sterki. 



Vertigo gouldii Binney. 



Pupa gouldii Binney, Proc. Boston Soc. Nat. Hist., i, p. 105, 1843 ; Terr. 

 Moll., II, p. 332, pi. Lxxi, fig. 2, 1851. 



7 ° 



a b 



Fig. 17. Vertigo gouldii {ma^xnfv^i). Fig. 18. Vertigo bollesiana {ms.^wK^e^A'). 



Vertigo gouldii U.O-B.?,r., Am. Nat., I, p. 669, fig. 60, 1868. — Journ. Portland 



Soc. N. Hist., I, p. 38, fig. 95, pi. X, fig. 96, 1864. 

 Vertigo bollesiana MoRSE, Ann. N. Y. Lye. Nat. Hist., viii, p. 209, figs. 4-6, 



1865. 



