OF THE UNITED STATES. 163 



perly to the genus Carychium of Muller and Fer- 

 russac. 



2. P. *rupicola. Shell dextral, attenuated to an 

 obtuse apex, white ; tvhorls six, glabrous ; mature 

 deeply impressed ; labium bidentate; superior tooth 

 lamiform, emarginate in the middle, and at the ante- 

 rior tip obsoletely uniting with the superior termina- 

 tion of the labium ; iuferior tooth placed upon the 

 columella, and extending nearly at a right angle with 

 the preceding ; lab rum tridentate, teeth placed some- 

 what alternately with those of the labium, inferior 

 tooth situated at the base and immediately beneath 

 the inferior tooth of the labium. 

 Length, about 1-10 of an inch. 

 Inhabits East Florida. 



I formerly found it abundant on the banks of St. 

 John's river, in E. Florida, and more particularly 

 under the ruins of Fort Picolata, under stones, &c. 

 It is about the size of P. corticaria, and conside- 

 rably resembles that species, but is sufficiently dis- 

 tinguished by the circumstance, of its gradually de- 

 creasing in diameter from the body whirl, to its 

 obtuse tip, and in the character of the mouth, it is 

 widely distinct* 



Genus Succinea. 



S. ovalis. (Joum. Acad. Nat. Sciences, vol. 1. 

 p. 15.) A large variety of this species, is found very 

 common on the Missouri, of the length of about 4-5 



