SYNOPSIS. 63 



VI. Anictangium. 



VII. SCHISTOSTEGA. 



VIII. Bartramidula. 

 Subsection III. PEEISTOMI. 

 Such as are fm-nished with a true peristome. lu some cases it 

 is very fugacious aud thus apt to mislead beginners. 



Division 1. APLOPERISTOMI. 

 This division contains such genera as have a single peristome, or 

 only one circle of fringes. 



Genera : — IX. Diphyscium. 

 X. Tetraphis. 

 XI. Sflachnum. 

 XII. Cyrtodon. 



XIII. CONOSTOMUM. 



XIV. Encalypta. 

 XV. Weissia. 



XVI. Grimmia. 



XVII. DiDYMODON. 



XVIII. Trichostomum. 

 XIX. Glyphomitrion. 



XX. DlCRANUM. 



XXI. TORTULA. 



XXII. CiNCLIDOTUS. 



XXIII. POLYTRICHUM. 



Division 2. DIPLOPERISTOMI. 

 Mosses with a double peristome, in some instances furnished 

 also with additional ciliary processes. 



