1911] The Ottawa Naturalist. 95 



lakes near the base of the Peninsula, three of which^are joined 

 into a chain by rivers. Springs and small streams abound, and 

 swales and swamps are common. Near the Lake Huron shore 

 are extensive bogs and at Mud Lake is a large bog. 



The places mentioned in these notes are located as follows : 

 Wiarton, Colpoy's Bay, Cape Croker, Hope Bay, Barrow Bay, 

 and Lion's Head on the shore of Georgian Bay; Oliphant and 

 Golden Valley on the shore of Lake Huron; Adamsville, Purple 

 Valley and Mar in the interior. 



These notes are not presented in the belief that they con- 

 stitute a complete list of the algae of the region, since they are 

 the result of but two months' work May and June, 1911 and 

 no forms are included which were not in perfect shape for identi- 

 fication. In the case of Anabaena, Spirogyra, Vaucheria, Zyg- 

 nena, and Oedogonium, this limits the list very considerably 

 since fruiting material is always rare compared with that in a 

 vegetative condition. The majority of the species recorded 

 constitute first records for Canada. 



Cyanophyceae. 



Chroococcus turgidus, Naegeli. Bog, Mud Lake, near Colpoy's Bay 

 June 7; Marsh, Oliphant, June 14. 



Gleocapsa rupestris, Kuetzing. Common on stones in pools in 

 rock of limestone point on shore of Lake Huron at Oliphant, 

 June 14. 



Microcystis mdrginata, Kuetzing. Floating among other algae 

 at windward shore of Sky Lake, near Oliphant, May 28; 

 Bog, Mud Lake, near Colpoy's Bay, June 26. 



Coelosphaerium kuetzingianum, Naegeli. Floating among other 

 algae at windward shore of Sky Lake, May 28. 



Merismopedium glaucum, Naegeli. Plankton, Pool on the 

 Commons, Colpoy's Bay, May 8, 1911; Swale, Colpoy's 

 Bay, May 20; Pool, McGregor's Harbour, Cape Croker, 

 May 30; Shore of Lake Huron at Oliphant, June 14; Sky 

 Lake, May 28. 



Oscillatoria tenuis, Agardh. Damp place on rock. Colpoy's 

 Bay, May 11. 



Oscillatoria subtilissima, Kuetzing. Damp place on rock, Col- 

 poy's Bay, May 11. 



Oscillatoria formosa, Borv. On timber in a small stream near 

 Colpoy's Bay, May 27. 



Nodularia paludosa, Wolle. Swale near Colpoy's Bay, May 20; 

 Swamp, Golden Valley, June 1. 



Anabaena tor ulosa, Lagerheim. Swale, Colpoy's Bav, Mav 20; 

 Swamp, Golden Valley, June 1. 



