COLUMELLA. 243 



Length 2.4, diani. 1.3 mm., 6% whorls. Onondaga Co., N, 

 Y., fig. 14. 



Length 2.3, diam. 1.3 mm., 6V2 whorls. Ward, Montana. 



In Canada C. edentula occurs from the Magdalen Islands 

 to Vancouver Island, and north (according to Dall) to Lab- 

 rador, Alaska and some of the Aleutian Islands. Southward 

 it is commonly found as far as New Jersey, Pennsylvania, 

 Iowa, Montana and Oregon. I have seen a single very small 

 specimen from Evergreen, Conecuh Co., Alabama (H. H. 

 Smith), the only locality known in the Southern States 

 (fig. 17). 



American references. — Pupa simplex Gould, Boston Jour- 

 nal of Nat. Hist, III, 1840, p. 403, pi. 3, f. 21 (grove north 

 of Fresh Pond, Cambridge, Mass.) ; Terr. Moll., II, p. 343, pi. 

 72, f. S.—Vertigo simplex Gld., W. G. Binney, Terr. Moll., V, 

 1878, p. 219 ; Man. Amer. Land SheUs, 1885, p. 191, f . 195.— 

 Eandolph, Nautilus, IX, p. 102 (Seattle, Wash.). — Taylor, 

 Nautilus, V, p. 91 (Vancouver I.). — Sphyradium edentulum 

 Haneam, Nautilus, XI, p. 110 (Quebec). — Sterki, Nautilus, 

 X, p. 75 (systematic position). — J. Henderson, Moll, of Colo., 

 Univ. of Colo. Studies, IV, p. 177 (Colorado records, probably 

 all C. alticola). — Dall, Harriman Alaska Exped., XIII, p. 54 

 (northern localities; includes C. alticola as a synonym). — 

 Hanna, Proc. U. S. Nat. Mus., vol. 41, 1911, p. 374, f. 2, 3, 4 

 (anatomy). 



8. Columella alticola (Ing.). PI. 31, figs. 6, 7, 8. 



Shell perforate, straight, two and one-half times as long 

 as broad, densely striate, subtranslucent, chestnut-brown, apex 

 obtuse; whorls 6 or 7, convex, the middle three of the spire 

 equal, causing a parallelism in the sides of the shell, the last 

 noticeably greater, expanding toward the aperture, not closely 

 appressed to the body- whorl ; suture deeply impressed ; aper- 

 ture small, oblique, subtriangular, margins connected by a 

 thin deposit, without internal processes; peristome simple, 

 somewhat reflected over the umbilicus (Ingersoll). 



Length 3, diam. 1.35 mm.; iy 2 whorls. Nat'l Park, Wy- 

 oming. Fig. 6. 



