3O 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., n, p. 332, pi. LXXI, fig. 2, 1851. 



a b 



FIG. 17. Vertigo gouldii (magnified). FIG. 18. Vertigo bollesiana (magnified). 



Vertigo gouldii MORSE, 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., vin, p. 209, figs. 4-6. 



1865. 





