Fresh Water Algae in Vicinity of Montreal 423 



Rivularia haematites ,Ag.). 



Heterosysta basal, extremities of filament pilifer 

 ous, no spores. Globose thallus attached to 

 stones in streams and to Myriophyllum 



Amherst Park. 



Order II. Coceogoneales. 



Family 1. Chamaesiphoniaeeae. 



Chamsesiphon incrustans, Grun. 



Diam. of cells 3.5-4.8 micr. 



On filaments of Vaucheria from Bout de 1 'He. 



Chroococcus turgidus, Kiitz. 

 Diam. cells 13-25 microns. 

 Mount Royal. 



Merismopedia glauca, Ehring. 

 Diam. of cells 3.3-3.8 microns. 

 Mount Royal. 



