128 Cincinnati Society of Natural History. 



2. Lamproderma. Threads of the capillitium brauching 

 and anastomosing to form a network. 



d. The columella extending beyond the ceyiter of the 

 sporangium. 



3. CoMATRiCHA. Threads of the capillitimu forming only 

 an interior network, attaining the wall by numerous more or 

 less elongated free extremities. 



4. Stemonitis. Threads of the capillitium forming an 

 interior network of large meshes and a superficial network of 

 smaller meshes. 



5. Enerthenema. Threads of the capillitium pendent 

 from a discoid membrane at the apex of the columella. 



B. Stipe and columella zchite or yelloxcish. 



6. Di.\chaea. Threads of the capillitium l)ranching and 

 anastomosing to form a network. 



I. CLASTODERMA, Blytt. Sporangium regular, globose, 

 stipitate ; the wall very thin and fragile. Stipe elongated, 

 tapering upward, entering the sporangium as a very short or 

 nearly obsolete columella. Capillitium arising by a few 

 branches from the apex of the columella, these branches fork- 

 ing several times at a sharp angle, but not combined into a 

 network, the ultimate branchlets long and free, or only con- 

 nected together at their tijis by persistent fragments of the 

 sporangial wall. Spores globose, violaceous. 



The claim of this genus to be distinguished from Lampro- 

 derma must rest ujion the fact that the branchlets of the 

 capillitium do not anastomose and form a network. It is the 

 same as the genus Orthotricha of Wingate. 



I. Clastodekm.'v Di: H.VKVAMM, Hl\ tt. Sporangium very 

 small, globose ; the wall early disappearing, except the minute 



