SOME NOVA SCOTIAN AQUATIC FUNGI. — MOORE. 223 



Genus, Achlya Nees von Essenbeck. 



A. americana Humph. (Fig. 4.). H3^phfe 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/^-27/^ 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 sevei'al 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 Cos.sitt'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 



