sition. They surround the opening of the. caps 
single or double, rarely in a triple series. These sub 
I shall beg leave to call the * P. OMA, or 
The use of this Peristoma, or Fring to be tod 
the seeds in wet weather. In dry 
leaves the mouth of the capsule open, but 1 
moisture, even that of one’s breath, it closes. 
many peop 
siderable. 
they first begi 
of the 
_ moss 
_. forit 
* On the varying structure of the Peristoma 
and disposition of the barren florets, the aut 
establish the Genera of. Mosses. ee 
