Fresh Water Algae in Vicinity of Montreal 419 



S. gestivale, Hazen. 



Light green, palmelloid base, branching alternate, 

 main filaments 7-9 micr. diam. cells 2-6 diam. 

 long below, equal in ramuli, thin walled, some- 

 what swollen, ramuli near summit few. 



Verdun. 



Gleocystis gigas, Kiitz. 



Cells globose, 9-12 micr. diam. solitary, membrane 

 thick and lamellate, contents green. 



From floor of conservatory, Mount Royal. 



Family 4. Coleochaetacese. 



Coleoehaste sp? 

 Verdun. 



Order V. Siphonocladiales. 

 Family 1. Cladophoraceae. 



Cladophora glomerata (L), Kiitz. 



Fronds up to 30 cm. high, branches more and more 

 frequent towards the top, filaments cylindrical, 

 75-100 micr. diam. below, 6-7 diam. long. 35-50 

 micr. in ramuli, 3-6 diam. long, ramuli not 

 tapering, tips rounded. (An extremely vari- 

 able species — Collins). 



Verdun, Back River, Bout de 1 'lie. 



C. Kuetzingiana, Grunow in Rabenhorst. 



Soft, loose, feathery tufts, up to 30 cm. high, fila- 

 ments 45-85 micr. diam. below, ramuli 25-35 

 micr. diameter, cells cylindrical, slightly swollen 

 ramuli, 6-10 diam. long below, 2-4 diam. long in 

 ramuli, branching erect, opposite, or alternate 

 below, ramuli with acute tips. 



Bout de l'lle, Back River. 



