4:20 Canadian Record of Science 



Order VI. Siphonales. 

 Family 1. Vaucheriaceae. 

 Vaucheria sessilis, Vauch. 



Filaments 50-85 micr. diam. oogonia usually two, 

 sessile ovoid, 70-85 x 75-100 micr. more or less 

 oblique. Short beak, antheridium between the 

 oogonia on short pedicel, circinate, ripe oospore 

 with triple membrane, filling the oogonium. 



Back River, Amherst Park, Bout de 1 'lie. 



• I 

 V. geminata (Vauch.) var. racemosa. 



Filaments 50-90 x 60-75 micr. or smaller, corym- 

 bosely arranged about antheridium, which is 

 hooked. , 



Bout de Tile. 



II. Diatomacese. 



Found with Vaucheria and Cladophora from all the 

 localities. 



Order Pennatas. 



Family 1. TabellariaceEe. 



Tabellaria flocculosa (Roth) Kiitz. 



Family 2. Fragilariaceee. 

 Fragillaria capucina. 

 Length of valves 30-60 micr. 



Synedra ulva, Nitzsch- 

 Length of valves 150-250 micr. 



