224 



SOME NOVA SCOTIAN AQUATIC FUNGI. MOORE. 



oogonia were covered with short, blunt, wart-like outgrowths, 

 and the supporting branches of the oogonia were shorter than 

 the typical form. Its characteristics remained constant through 

 several generations, but it was obtained only from the one 

 source. It appears to agree very closely with Trow's A. 

 amencana var. cambrica*. 



A. deBaryana Humph. = A. polyandra deBary (Figs. 5-8). 



Hyphse robust and long* 

 reaching one centimetre. 

 Sporangia produced in mod- 

 erate numbers somewhat 

 spindle shaped, with a longer 

 tapering apex than in most 

 Achlyas, often developed in 

 basipetal succession. Oogonia 

 spherical, terminal on short, 

 straight lateral branches, 

 raceinosely arranged or on 

 main filaments. Walls thick- 

 ened, but not pitted. Oospores 

 2-10 in an oogonium, usually 

 2-5; 23/z-35/x in diameter, 

 exceritric. Antheridial 

 branches produced on fila- 

 ments bearing oogonia, very 

 long and much branched, the 

 branches uniting indifferently with oogonia borne on the same 

 filament or on others. The antheridia are long, cylindrical or 

 slightly clavate and wrapped about the oogonia several to 

 each. 



The material in which this species appeared was taken from 

 a pool near the Grand Lake Road, Sydney, near a large brook 

 flowing into Grand Lake. The walls of the oogonia, while not 

 definitely pitted, show a few small more lightly stained areas 



