228 



SOME NOVA SCOTIAN AQUATIC FUNGI, — MOORE. 



the vicinity of Sydney. It appears to be one of our nio;jt com- 

 mon Saprolegniacece. The frequency'' of the development of an 



apicnhis appears to vary considerabi}^ in"cultures obtained from 

 different sources. In some, practically^all of the oogonia are so 

 terminated, while in others not more than one in three is so 

 furnished. 



A. racemosa HWdel). (F\ir. 14). H^'pha; of moderate length, 

 robust. Sporangia generally abundantly produced, cylindrical. 



Ooogonia terminal on main fila- 

 ments and on lateral branches, 

 racemosely arranged , Walls 

 unevenly thickened, but not 

 ]:)itted, brownish when old. 

 Oospores 1-6 in an oogonium, 

 most commonly 3-4, 23/ia-30^ in 



diameter, centric. Antlieridial 



branches arise from the oogonial 

 branches or from the walls of the oogonium or occasionally from 

 the main filament near the oogonial branches. Antheridia 1-3 

 to each oogonium, short clavate, turned at right angles to the 



