228 



SOME NOVA SCOTIAN AQUATIC FUNGI. MOORE. 



the vicinity of Sydney. It appears to be one of our most com- 

 mon Saprolegniacece. The frequency of the development of an 



apicnlus appears to vary considerably 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 Hildeb. (Fig. 14). Hyphae of moderate length, 

 robust. Sporangia generally abundantly produced, cylindrical. 



Ooogonia terminal on main fila- 

 ments and on lateral branches, 

 racemosely arranged p Walls 

 unevenly thickened, but not 

 pitted, brownish when old. 

 Oospores 1-6 in an oogonium, 

 most commonly 3-4, 23/-t-30ft in 



diameter, centric. Antheridial 



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 



