﻿NO. l8 NEW LANDSHELLS FROM PANAMA — DALL 3 



This is obviously of the group of P. coloratus Nyst, but differs 

 in form and in its white peristome. The umbilicus varies in ampli- 

 tude in different individuals. 



With the above was an immature specimen of Oxystyla with a 

 conspicuously minutely reticulate surface, fine spiral threads cross- 

 ing minute regular axial ridges with equal interspaces, the color 

 purplish, with three narrow pale equidistant spiral bands. 



