438 HELICIDiE. 



Pupa contracta. 



Fig. 117. 



Shell ovate-conical, whitish ; whorls five, convex ; aperture sub-ovate, lip 

 spreading; throat armed with three teeth, and contracted, by a large concave 

 tooth on the transverse lip, into the form of a horseshoe. 



Pupa contracta, Say, Journ. Aoad. ji. 374 (1822); Binnkt's ed. 25 { Carychium ?) . — 

 Gould, Best. Journ. iii. .399, pi. 3, fig. 22 (1840); iv. 3.59 (1843); Inv. 186, fig. 

 117 (1841). — De Kay, N. Y. Moll. 49, pi. 4, fig. 47 (1843). — Adams, Vermont 

 Moll. 1.57. — Pfeiffer, Symb. ii. .54 ; Men. Hel. Viv. ii. 356. — Ku.stkr. in Chem- 

 nitz, 2ded. 96, t. 13, figs. 16- 18. — Binney, Terr. Moll. ii. 324, pi. 70, fig. 2. — 

 W. G. Binney, Terr. Moll. iv. 143. 



Pupa coiiicaria, Pfeiffer, Synib. ii. 54 (an var. (if Pfr. 1. c). 



Pupa dtltodoiiin, Charpkntiek, in Chemnitz, 2d ed. 181, pi. 21, figs. 17-19. — Pfeif- 

 fer, Mon. iiel. Viv. iv. 683. 



Leucochila contracta, Morse, Am. Nat. i. 666, fig. 54 (1868). 



Shell ovate-conical, of a waxen-white color ; whorls five, convex, 

 faintly marked by Hnes of growth, separated by a well-impressed 

 suture, and gradually tapering to a somewhat pointed 

 apex. Aperture irregularly ovate, al)Out half the width 

 of the lower whorl, broadest above, and somewhat point- 

 ed in front ; lip widely reflected, not flattened, so as to 

 give a bell-shai)ed form ; throat with three, and perhaps 

 four teeth ; a large spoon-shaped one, concave to the 

 right side, seated on the transverse lip, and greatly con- 

 tracting the throat into something of a horseshoe sha})e ; 

 a very slight undulation near the top of the left lip ; an 

 oblong, thin tooth, seated at the front of the pillar, so far within 

 as scarcely to be discerned without breaking the shell ; and a mi- 

 nute tooth about the middle of the right lip ; umbilicus large and 

 distinct ; last whorl indented at some distance behind the outer lip. 

 Length, one tenth of an inch ; breadth, one twentieth of an inch. 



Found about old stumps and decaying logs, usually under the 

 bark, and near the earth. It has been observed in most parts of 

 Eastern North America. 



It is readily known by its whitish, translucent appearance, by its 

 bell-shaped aperture, and especially by its large, spoon-shaped tooth, 

 which gives such a peculiar form to the throat. The teeth at the 

 sides may rather be regarded as inward protuberances of the mar- 

 gin. It appears to be covered with a hairy or glutinous coating, 

 which causes dirt to adhere to it. 



