Original Combination:

fusco = brown, labris = lip [latin]

Original Description:

Finally, near Woodville, Jackson county, in northern Alabama, a form was collected several years ago, by Mr. H. E. Sargent, which seems to be the culmination of the alleni type, with some special features which make it advisable to treat it as a local variety under the new name P. albolabris fuscolabris. The shell is very large, alt. 19, diam. 34 mm., to alt. 21, diam 38 mm.; depressed, glossy and finely striate, as in alleni with the aperture more oblique and the lip narrower than in albolabris of the same size. The basal lip bears a low, flat-topped, wide tooth near the columella, and the outer lip is tinted fleshy-brown (fading in cabinet specimens). Whorls 5 1/2.

This particular form is yet known from Mr. Sargent's collections only. A large, heavy form of P. albolabris, probably referable to var. major, also occurs near Woodville. P. a. fuscolabris bears such a relation to alleni as major to alholahris, or var. normalis to typical P. andrewsae.