OF THE UNITED STATES. 371 



ihe labium, within somewhat livid ; labrum reflected 

 but not flattened, and not abruptly contracting the 

 aperture, white before and yellowish behind, near 

 the junction with the columella is a callus which 

 does not rise into an angle. 



Length from the apex to the base of the columella, 

 three-fifths of au inch, nearly. 



Greatest breadth one inch and one-tenth. 



Inhabits Northumberland county, Pennsylvania. 

 Cabinet of Mr. William Hyde. 



This species may be compared with the H. lactea, 

 Muller and Ferrussac ; the spire is rather more pro- 

 minent, the white spots or rather abbreviated lines 

 are similar in form, size, and number, but its labrum 

 preserves the same colour with the exterior of the 

 shell, and the livid tint of the inner portion of the bo- 

 dy whorl is very pale, the posterior face of the re- 

 flected labrum is immaculate, and its callus base is 

 not angulated ; the aperture is much less wide 

 than that of lactea ; and, in Mr. Hyde's specimen, 

 a small fissure remains near the umbilicus. It still 

 more closely resembles a variety of a shell which in- 

 habits the island of Candia, but that species has al- 

 ways a white base, being immaculate beneath the in- 

 ferior band. 



2. H. *inornata. Shell snbglobose, pale yellowish- 

 horn colour, polished; whorls five, rounded, wrinkled; 

 spire convex ; suture not deeply impressed ; umbili- 

 cus small, profound ; aperture wide, at the junction 

 of the labia with the penultimate whorl shorter than 

 the width of the mouth : labrum simple. 



