OF TIIH UNITED STATES. 375 



Inhabits Virginia. 



This is ji short, wide species, sufficiently distinct 

 from others, and readily distinguished hy the lamina 

 of the labrum being much elevated, and by the mag- 

 nitude of the tooth of the labium. I obtained two 

 specimens at Occoquan under a pile of bricks and 

 rubbish. This species probably belongs to the genus 

 Carychium. 



2. P. *exigua. Shell dextral, tapering, oblong, 

 with minute grooved lines; apex obtuse ; whorls five ; 

 suture deeply impressed ; labium bidentate, superior 

 tooth situate rather beneath the middle of the lip, in- 

 ferior tooth small, placed on the columella ; labrum 

 mutic, reflected, but not flattened ; umbilicus distinct. 



Length more than one-twentieth of an inch. 



This is the smallest species that I have seen. Nu- 

 merous specimens of it were found near this city by 

 Mr. William Hyde, and 1 have obtained many at 

 Harrigate. Its aperture resembles that of Pupa (Ca- 

 rychium) corticaria, but the superior tooth of the la- 

 bium of that shell is situate much nearer to the supe* 

 rior termination of the labrum than the correspond- 

 ing tooth of this diminutive species. It is probably 

 a Carychium. 



Genus, VERTIGO Muller and Ferrussac. 



P. *ovata. Shell dextral, subovate, brown ; apex 

 obtuse ; whorls five, glabrous ; suture not very 

 deeply impressed; body whorl indented near and 

 upon the labrum ; aperture semioval ; labium five- 



