PUPA. 



243 



half as wide as the body-whirl, expauded above and diminishing regularly 

 into a very narrow throat, with four teeth, one upon the columella, large, 

 coarse, and irregular, projecting into and very much filling up the aper- 

 ture, and having a concavity on the side towards the peristome ; another 

 tuberculous, not large, more or less near the margin of the peristome ; and 

 two others, massive and prominent, deep seated in the throat, one being in 

 the base behind the columellar tooth, and the other on the side of the 

 umbilicus and apparently produced by the umbilical fold ; umbilicus with 

 a minute perforation ; base of the shell with a sharp keel between the 

 umbilicus and margin ; last whirl impressed behind the peristome. 

 Length 3, diam. 1| ; of aperture, length 1 mill. 



Pupa contracta, Say, Journ. Acad. Nat. Sci. Philad. II, 374 (1822) ; Bin- 

 ney's ed. 25 {Cmychium?). — Gould, Bost. Journ. Nat. Hist. Ill, 399 

 pi. iii, f. 22 (1840) ; IV, 359 (1843) ; Invertebrata, 186, f. 117 (1841). 

 — DeKay, N. Y: Moll. 49, pi. iv, f. 47 (1843).— Adams, Vermont 

 Mollusca, 157. — Pfeiffek, Symbol;?, II, 54; Mon. Hel. Viv. II 35(J. 

 — KusTEK, in Chemnitz, 2d ed. 96, tab. xiii, f. 16-18. — Bixney Terr. 

 Moll. II, 324, pi. Ixx, f. 2.— W. G. Binney, T. M. IV, 143. 



Pupa corticaria, Pfeiffek, Symbolse, II, 54 (an var. B? Pfeiffek, /. c). 



Pupa deltostoma, Charpentier, in Chemnitz, ed. 2, 

 p. 181, pi. xxi, f. 17-19.— Pfeiffek, Mon. Hel. 

 Viv. IV, 683. 



Leucockila contracta, Morse, Amer. Nat. 666, f. 54 

 (1868). 



Inhabits the whole of Eastern North America. 



Fig. 422 is a fac-simile of the original figure 



of Pupa deltostoma, which appears identical 



with P. contracta. Pupa deltostoma. 



Fig. 422. 



Pupa rupicola, Say. — Shell cylindrical, elongated; epidermis 

 brownish horn-color ; whirls six, convex, the three anterior ones of nearly 

 equal diameter, the three posterior diminishing very slightly, and forming 

 an obtuse apex ; suture deep ; peristome brownish, thickened within, 

 widely reflected ; aperture lateral, semicircular, truncated above by the 

 body-whirl; teeth five, one on the middle of the columella prominent, 

 compressed, emarginate in the middle, and often bicuspid ; another at the 

 termination of the axis, marking internally the situation of the umbilicus, 

 conical, and often composed of two or more tubercles ; a third in the base 

 of the aperture, a fourth upon the peristome, and a fifth, often massive 



