422 Canadian^ Record of Science 



A. inaequalis, Kiitz. 



Trichomes vary in thickness, about 4 microns in 



diam. 

 • Amherst Park. 

 Family 3. Oscillatoriaceae. 



Lynghya aestuarii, Lieb. 

 (Oscillatoria insignis, Cooke.) 

 Thickness of trichomes 24 microns. 



Bout de Tile. 



Oscillatoria tenuis, Ag. 



Trichomes straight, active, motile, joints half as 

 long as broad, apex obtuse, cell contents pale 

 blue, forming dark blue green stratum. Fila- 

 ments 3 microns diam. 



Bout de l'lle, Back River, Amherst Park. 



0. leptotricha var. splendida, Kiitz. 



Trichomes 2 micr. diam. indistinctly articulate, 

 joints twice as long as broad, minutely punctate 

 at periphery, cell-contents pale bluish-green. 



Verdun. 



Family 4, Rivulariaceee. 



Calothrx confervicola, Ag. 



Tufts fasciculate, filaments dark bluish purple, at- 

 tenuated, 18 microns in diam. heterocysts all 

 basal, generally few in number. 



Mount Royal. 



