8o British Ftin^i. 



s 



production by zoogonidia ; sexual mode by zygo- 

 spores. 



Either aerial and endoparasites in plants, or aquatic 

 and parasitic on algao, f Lingi, or infusoria. 



YI. Peotomycetacej!;. 

 Filiform liyphce soon disappearing ; sporangia very 

 thick-walled. 



Aerial fungi ; endoparasitic in plants. 



Analytical Key to Suhfamilies. 



FaM. 1. MUCORACE^. 



A. Columella present, hyphae of mycelium stout, 

 not anastomosing. 



* Sporangium containing many gonidia. 



1. Subfam. Piloholece. 



Tunic distinct from sporangium. 



2. Subfam. Mucorece. 



Tunic homogeneous with sporangium, entirely 

 disappearing or persistent. 



** Sporaugium containing only one gonidium. 



3. Subfam. Glicetocladiece. 



B. Columella absent ; hyphse of mycelium slender, 

 auastomosing. 



4. Subfam. Mortierellefe. 

 Sporangium globose. 



5. Subfam. Syncephalidece. 

 Sporangium cylindrical. 



Subfam. 1. PiLOBOLEiE. 

 Tunic of sporangium diffluent at the base ; sporan- 

 gium polysporous ; mycelium not anastomosing. 



Analysis of the Genera. 

 Piloholus. Sporangia elastically projected. 



