191 1J The Ottawa Naturalist. 97 



Mougeotia scalaris, Hassall. Near mill, Lake Isaac, June 5; 

 Pool in swamp at Mud Lake, June 6. 



Mougeotia viridis, Wittrock. Common in swale, Colpoy's Bay, 

 May 20. 



Chlamydomonas communis, Snow. Abundant in a collection 

 from a swamp on Mar road, June 5. 



Chlamydomonas globosa, Snow. Common in pools and swamps 

 throughout the Peninsula. 



Hacmatococcus pluvialis, Flotow. Common in pools in holes in 

 limestone point on Sky Lake, near Oliphant, May 23. 



Pandorina morum, Bory. In small marsh at Sky Lake, May 28; 



in marsh on Cape Croker road, May 30; Swamp, Golden 



Valley, June 1 ; Abundant in a collection from a swamp on 



Mar road, June 5. 

 Volvox aureus, Ehrenberg. Scarce in a collection from a swamp 



on Mar road, June 5. 

 Tetraspora lubrica, Agardh. Common in a stream in a pasture, 



Colpoy's Bay, April 30 ; in pools along a bush road, near Mar, 



May 10. In a stream between Colpoy's Bay and Purple 



Valley, May 2 7. 

 Chlorococcum humicola, Rabenhorst. Common under dripping 



water. 

 Characium naegelii, A. Braun. Common on other algae, par- 

 ticularly on Conferva bombycina throughout the peninsula. 

 Characium ambiguum, Hermann. On Conferva bombycina in 



swale near Colpoy's Bay, June 20. 

 Rhaphidium falcatum, Cooke. Swamp, Mar road, June 5 ; Ditch, 



near Boat Lake, June 16; Pool, Hope Bay, June 8; Shore 



of Lake Huron at Oliphant, June 14. 

 Rhaphidium falcatum aciculare, Hansgirg. Swale, Colpoy's Bay, 



May 20; Pool near Colpoy's Bay, May 30; Common in swamp 



near Golden Valley, June 1. 

 Xcphrocytium agardhianum, Naegeli. Swamp on Mar road, 



June 5. 

 Tetraedron minimum, Hansgirg. Pool, Hope Bay, June 8; 



Small stream, Oliphant, June 14. 

 Scenedesmus bifuga, Wittrock. Pool, Hope Bay, June 8; Pond 



or Commons, Colpoy's Bay, May 11. 

 Scenedesmus obliquus, Kuetzing. A common plankton form 



throughout the Peninsula. 

 Scenedesmus quadricauda, Brebisson. A common plankton form 



throughout the region. 

 Scenedesmus quadricauda abundans, Kirchner. Pool, McGregor's 



Harbour,. Cape Croker, May 30; Ditch, near Boat Lake, 



June 16. 



