. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Pupa contracta. tricose, to the apex; suture well impressed; peristome white, thickened, some- what reflected, its extremities connected by a raised, testaceous fold, making the margin of the aperture entire ; aperture lateral, rather triangular or trilo- bate, more than half as wide as the body-whorl, expanded above and diminish- ing regularly into a very narrow throat, with 4 teeth, one upon the columella, large, coarse, and irregular, projecting into and very much filling up the aper- ture, and having a concavity o
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Pupa contracta. tricose, to the apex; suture well impressed; peristome white, thickened, some- what reflected, its extremities connected by a raised, testaceous fold, making the margin of the aperture entire ; aperture lateral, rather triangular or trilo- bate, more than half as wide as the body-whorl, expanded above and diminish- ing regularly into a very narrow throat, with 4 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 tuber- culous, 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 perfora- tion ; base of the shell with a sharp keel between the umbilicus and margin ; last whorl impressed behind the peristome. Length, 3, diameter, If mill. ; of aperture, length, 1 mill. Pupa contracta, Say, Journ. Acad. Nat. Sci. Philad., II. 374 (1S22); Binney's ed. 25 (Carrjchium?). —Gould, Bost. Journ. Nat. Hist., III. 399, PI. III. Fig. 22 (1840); IV. 359 (1843); Invertebrata, 186, Fig. 117 (1841). — DeKay, N. Y. Moll., 49, PI. IV. Fig. 47 (1843). —Adams, Vermont Mollusca, 157. — Pfeiffer, Symbols;, II. 54; Mon. Hel. Viv., II. 356.—KL'ster, in Chem- nitz, 2d ed. 96, tab. XIII. Figs. 16 -18. — Binney, Terr. Moll., II. 324, PI. LXX. Fig. 2. — W. G. Binney, T. M., IV. 143; L. k Sh., I. 242 (1869). —Gould and Binney, Inv. of Mass., ed. 2, 438 (1870). Pupa corticaria, Pfeiffer, Symbols, II. 54 (an var. £ ? Pfeiffer, 1. c.). Pupa deltostoma, Charpentier, in Chemnitz, ed. 2, p. 181, PI. XXI. Figs. 17- 19. — Pfeiffer, Mon. Hel. Viv., IV. 683. Lcucochila contracta, Morse, Amer. Nat., 666, Fig. 54 (1868).—Tryon
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