EASTERN PROVINCE — INTERIOR REGION SPECIES. 



323 



Pupa pentodon. 



Pupa 

 pentodon. 



Shell deeply rimate or perforate, cylindrically shortened, apex ex- 

 tended into au obtuse cone, horn-colored, smooth; whorls 5-9; aper- 

 ture rounded, with few or no folds ; peristome somewhat expanded. 



Pupa pentodon, Say. 



Shell subperforate, of an elongated-ovate form, minutely striated, 

 p,g 34. and of a spermaceti or whitish fig. 348. 



horn -color; whorls about 5, well 

 rounded, and separated by a deep 

 suture ; apex rather acute ; aper- 

 ture oblique, nearly semicircular; 

 peristome sharp and somewhat 

 expanded, but not refiexed ; the submargin of the throat is thickened 

 by a ridge of white callus, on which the denticles are situated; one of 

 these, and sometimes two, is on the parietal wall, two on the columellar 

 portion of the peristome, and two constantly, and from one to five 

 others occasionally, on the other portion of the peristome; of these, 

 that near the middle of the parietal wall is largest, that at the ui>per 

 part of the columella is next, and one opposite the first, on base of the 

 aperture, is the third in size. Length, 2"""; diameter, 1"""; of aper- 

 ture, length, |""°. 



Vertigo pentodon, Say, Jouru. Acad. Nat. Sci. Phila., ii, 476 (1822); ed. Binney, 27. 



Pupa pentodon , Gould, Bost. Journ. Nat. Hist., iv, 353, pi. xvi, figs. 10, 11 (1843). — 

 De Kay, N. Y. Moll., 50, pi. iv, fig. 48; pi. xxxv, fig. 337 (1843).— Pfeiffeb, 

 Mod. Hel. Viv., ii, 359 ; iu Chemnitz, ed. 2, 125, pi. xvi, figs. 24-26. — Binney, 

 Terr. Moll., ii, 328, pi. Ixxii, fig. 1.— W. G. Binney, Terr. Moll., iv, 143; v, 

 200; L. & Fr.-W. Sb., i, 238 (1869).— Gould aud Binney, Inv. of Mass., ed. 

 2, 404 (1870). 



Pupa curvidens, GovLD, Invertebrata, 189, fig. 120 (1841). 



Pupa Tappaniana, Adams, Sillimau's Journ. fi],xl, Suppl. ; Shells of Vermont, 158 

 (1842). — Pfeiffer, Symbolse, ii, 55. 



Leucochila pentodon, Morse, Journ. Portl. Soc, i, 36, fig. 85; pi. x, fig. 86 (1864); 

 Amer.'Nat., 667, fig. 56 (1868). 



Pupilla pentodon, Tuyon, Am. Journ. Conch., iii, 303 (,1868). 



Northern and Interior Eegious, having been found from Georgia and 

 Mississippi to the most northern portions of the Union. It is usually 

 found at the foot of trees and under leaves. 



Animal blackish above, light gray below; foot moderately long, the 

 transverse fissure very distinct, the anterior portion having the mouth 

 in the center and bilobate in front. Tentacles about one-third as long 

 as the eye-peduncles. Very sluggish in its movements, aud carries the 

 shell nearly horizontally or very slightly elevated. 



