1913] Klugh, Notes on the Algae of Georgian Bay 91 
Common on aquatic plants. On Vallisneria spiralis, Potamogeton 
heterophyllus and Elodea canadensis at Waubaushene. On submerged 
leaves of Eleocharis acicularis in the Severn River, Muskoka. On 
Potamogeton perfoliatus at Shawanaga, Parry Sound. On M yriophyl- 
lum spicatum in the French River, Nipissing District. I have found 
this Rivularia before in lakes and streams in the Laurentian region 
and as it seems characteristic of this region I have named it as 
above. 
CHLOROPHYCEAE. 
Pandorina morum, Bory. Pool, Shawanaga River, Aug. 27. 
Rhaphidium falcatum, Cooke. Pool, Shawanaga River, Aug. 27. 
Rhaphidium falcatum aciculare, Hansgirg. Pool, Shawanaga River, 
Aug. 27. 
Nephrocytium agardhianum, Naegeli. Floating at shore, Wau- 
baushene, Aug. 24. 
Tetraedron regulare, Kuetzing. Plankton, Waubaushene, Aug. 24. 
Scenedesmus bijuga, Wittrock. Plankton, Waubaushene, Aug. 
24. French River, Aug. 31. 
Scenedesmus obliquus, Kuetzing. Pool, Shawanaga River, Aug. 27. 
Scenedesmus quadricauda, Brébisson. Among other Algae on leaf 
of Nymphaea advena in lake off the Shawanaga River, Aug. 27. Wau- 
baushene, Aug. 21. French River, Aug. 31. Fishing Island Cove, 
Manitoulin, Sept. 7. 
Coelastrum microporum, Naegeli. Plankton, near Collin's [nlet, 
Sept. 3. 
Pediastrum boryanum, Meneghini. Plankton, Müllers Bay, Go- 
Home Bay, Aug. 17. Plankton, Waubaushene, Aug. 24, Fishing 
Island Cove, Manitoulin, Sept. 7. 
Pediastrum tetras, Ralfs. Pool, Shawanaga River, Aug. 27. Marsh, 
Killarney, Sept. 4. 
Ulothrix zonata, Kuetzing, On limestone rocks near Rattlesnake 
Harbour, Sept. 8. On limestone rocks, Bear’s Rump Island, near 
Tobermory, Sept. 9. 
Chaetosphaeridium globosum, Klebahn. On other Algae on leaf of 
Nymphaea advena in lake off Shawanaga River, Aug. 27. 
Chaetophora elegans, Agardh. On dead shells of Unio complanatus 
at Waubaushene, Aug. 21. 
Chaetophora incrassata, Hazen. Shore of Severn River, Aug. 21. 
