SOME NOVA SCOTIAN AQUATIC FUNGI. MOORE. 223 



Genus, Achlya Nees von Essenbeck. 



A. americana Humph. (Fig. 4.). Hyphae long, robust. 

 Sporangia abundantly developed, nearly cylindrical. Oogonia 

 spherical, on short, straight lateral branches racemosely ar- 

 ranged. Walls more or less abundantly pitted. Oospores up to 

 15 in an oogonium, 23/<t-27/Lt in diameter, excentric. Antheridial 

 branches abundant, arising from the main filaments near the 



oogonial branches, generally much branched. Antheridia 

 cylindrical, encircling to a greater or less extent the oogonia 

 usually several to each oogonium. 



Typical representatives of this species were obtained at Mt. 

 Thorn, Pictou Co., and also from a swamp adjacent to Sullivan's 

 Brook, near Sydney. From material collected at Cossitt's Lake, 

 near the same town, there developed a form which may be 

 found to be worthy of varietal rank. In it the walls of the 



