328 A MANUAL OF AMERICAN LAND SHELLS. 



a minute perforation ; base of the sliell with a sliarp keel between the 

 umbilicus and margin ; last whorl impressed behind the peristome. 

 Length, 3'"" ; diameter, l^""^ ; of aperture, length, 1""". 



Pupa coiitracia, Say, Joiirn. Acad. Nat. Sci. Philad., ii, 374 (182-2) ; Binney's ed., 25 

 (Carychiumf). — GouLD, Bost. Jonrn. Nat. Hist., iii, '^99, pi. iii, fig. 22 (1840) ; 

 iv, 359 (1843) ; Invertebrata, 186, fig. 117 (1841).— De Kay, N. Y. Moll., 49, pi. 

 iv, fig. 47 (1843). — Adams, Verinout Mollusca, 157. — Pfeiffer, Symbohe, ii, 

 54; Mon. Hel. Viv., ii, 356. — Kuster, iu Chemnitz, ed. 2,96, tab. xiii, figs. 

 16-18.— BiNNEY, Terr. Moll., ii, 3J4, pi. Ixx, fig. 2.— W. G. Binney, T. M., iv, 

 143; V, 207; L. & Fr.-W. Sli., i, 242 (1869).— Gould and Bixney, Inv. of 

 Mass., ed. 2, 438(1870). 



Pupa corlicaria, Pfeiffer, Syinbol?e, ii, 54 (and var. p ? Pfeiffer, 1. c). 



Pupa deliostoma, Charpextier, in Chemnitz, ed. 2, 181, pi. xxi, figs. 17-19. — 

 Pfeiffer, Mon. Hel. Viv., iv, 683. 



Leucochila contrada, Morse, Amer. Nat., 666, fig. 54 (1868).— Tryon, Am. Journ. 

 Conch., iii, 307(1868). 



Pupa Chicinnatiensis, Judge, Quar. Journ. Conch., i, 343, fig. (1878). 



Inhabits the whole of the Eastern Province. 



Animal blackish above, foot light gray. Eye-peduncles long and 

 slender, slightly curving; tentacles i^rominent and conical, pellucid at 

 tips. Respiratory foramen visible in the external angle of aperture. 



This is a well-defined species, always known by its subconical shape 

 and triangular apetture, nearly filled up by the coarse, projecting col- 

 umellar tooth. The descrii)tion here given applies to the most common 

 form of the mature shell, as ascertained from the examination of more 

 than one hundred specimens from difierent localities. Among a num- 

 ber of specimens there will of course be different degrees of development 

 and consequent variation from the normal form. Specimens from par- 

 ticular localities seem always to be more delicate, and never to attain 

 that coarseness of parts in the aperture which is common. There is 

 sometimes a slight thickening of the left i)eristome near its extremity. 

 Mature specimens vary considerably in size. The aperture is beautifully 

 "white within. 



Genitalia, jaw, and dentition unknown. 



Pupa riipicola, Say. 

 Shell cylijidrical, elongated ; epidermis brownish horn-color; whorls 

 6, convex, the three anterior ones of nearly 

 equal diameter, the three posterior diminish- 

 ing very slightly and forming an obtuse 

 apex; suture deep; peristome brownish, 

 thickened within, widely reflected; aperture 

 Pupa rupicoia enlarged. lateral, semicircuhxr, truncated above by the 

 body- whorl; teeth 5, one on the middle of the columella, prominent, 



