FAMILY PUPID^E 



31 



Vertigo bollesiana var. arthuri von Martens, Sitz-ber. Ges. Naturf. Fr. zu 

 Berlin, 1882, No. 9, p. 140. 



Range. — Northern United States east of the Rocky Mountains and 

 northward. 



Ottawa, Ontario ; Manitoba ; Upper Missouri at Fort Berthold ; 

 Helena, Montana. 



The variety arthuri is catalogued from Arctic America by an over- 

 sight, in Binney's Third Supplement, p. 185. It is really from the 

 Little Missouri in Dakota. 



Vertigo ventricosa Morse. 



Isthmia ventricosa Morse, Ann. N. Y. Lye. N. Hist., vm, p. 1, figs. 1-3, 1865. 

 Vertigo ventricosa Morse, Am. Nat., 1, p. 966, 



figs. 61, 62, 1868. 

 Vertigo ventricosa elatior Sterki, Nautilus, xi, 



p. 120, Feb., 1898. 

 Vertigo gouhiii lagganensis Pilsbry, Proc. 



Acad. Nat. Sci. Phila , for 1899, p. 314, 



fig. 1. 

 Vertigo approximans Sterki, fide Pilsbry. 



Range. — Quebec and Maine to Illinois 

 and Alberta , Manitoba ; variety elatior at 

 Laggan, Alberta. 



Fig. 19. Vertigo ventricosa 

 (magnified). 



Vertigo binneyana Sterki. 



Vertigo binneyana Sterki, Proc. Acad. Nat. Sci. Phila., for 1890, p. 33 ; 

 Nautilus, in, p. 125, March, 1890. — Pilsbry, Proc. Acad. Nat. Sci. 

 Phila., for 1899, p. 315, fig. 2 ; Nautilus, IV, p. 39, pi. 1, fig. I, Aug., 

 1890. 



Range. — Rocky Mountain region from Albuquerque, New Mexico, 

 to Manitoba. 



Seattle, Wash. ; Helena, Montana ; Winnipeg, Manitoba. 



20 21 22 



Figs. 20-22. Vertigo ovata, showing variations in teeth (see next page). 



