Original Combination:

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Original Description:

Differs from P. postelliana in the greater development of all the oral obstructions. The parietal process enters more deeply ; the upper lip-tooth is more deeply placed, more strongly hooked than usual in the typical form, and the apertural orifice decidedly narrower throughout, shaped like an interrogation mark (?) without the terminal dot. Surface regularly rib-striate, below as well as above. Whorls 5 ½ to 6. Alt. 5.7, greatest diam. 10 mm. Alt. 5, greatest diam. 9 mm. Bauldingsville; Baldwin, Baker county, and Imri, Hamilton county, Florida. A smaller form of this variety, smoother below, occurring in Volusia county, Florida, differs as follows: Aperture similar to the preceding, but anterior outline of the parietal wall more elevated, straighter, less excavated in front of the parietal fold. Surface almost or quite free from rib-striate below. Whorls 4 ½ to 5. Alt. 4, greatest diam. 7 ½ mm. Alt. 3 ⅓ greatest diam. 6 ½ mm. Typical P. postelliana occurs in Glynn and Wayne counties, Georgia, and South Carolina. I have not seen it from Florida.