Original Combination:

dentife = tooth [latin]

Original Description:

Animal. Greyish on the sides and posterior extremity, brownish on the upper parts, darker on the head and neck, foor long and narrow, superior tentaculae long and slender, eyes black.
Shell. Flattened, convex on the upper surface, convex below: epidermis, yellowish horn-color, immaculate: spire depressed: whorls, five, with delicate, parrallel, oblique striae: suture, distinct, not deeply impressed: aperture, contracted by the lip, flattend towards the plane of the base; lip white, broadly and abruptly reflected: pillar-lip with a prominent, white, tooth-like proccess nearly parallel with the lower margin of the aperture: base convex.
Greatest transverse diameter about three quarters of an inch.
Geographical Distibution. Noticed by me, hitherto, only in the State of Vermont, on the eastern slope of the Green Mountains.
Remarks. This species, now for the first time described, is not common in the localities which it inhabits. Its distinguishing marks are, its flattened form, and the tooth on the pillar lip.
While observing it with the animal retracted and the callar just visible at the aperture, I have heard a sharp snapping sound emmited, which seems of the respitory foramen; but in what manner it is produced I have not been able to discover. The same is made by H. albolabris, H. thyroidus, and H. diodonta, and is probably common to the genus.