Smith—Phytoplankton of the Muskoka Region. 
343 
PLEUROTAENIUM Nageli 1849 
Pleurotaenium Subcoronulatum var. detum W. & G. S. West 
Mill (rrr), Nelson (rrr), Nine Mile (rrr), Round (1) (rrr) . 
Pleurotaenium maximum (Reinsch) Lundell 
McGowan (rrr). 
Pleurotaenium Ehrenbergii (Breb.) DeBary 
Cornell (rrr). 
TRIPLOCERAS Bailey 1851 
Triploceras gracile Bailey 
Leech (rrr), Long (1) (rrr), Nelson (rrr). 
EUASTRUM Ehrenberg 1832 
Euastrtjm didelta (Turp.) Ralfs 
Brush (rrr). 
Euastrum pulchellum Breb. 
Silver (1) (rrr). 
Euastrum verrucosum var. alatum Wolle 
Mud (rrr). 
var. reductum Nords. 
Gull (1) (rrr). 
MICRASTERIAS C. A. Agardh 1827 
Micrasterias pinnatifida (Ktz.) Ralfs 
Otter (rrr). 
Micrasterias laticeps Nords. 
Black (1) (rrr), Brush (rr), Pennsylvania (rr), Strange (rrr). 
Micrasterias muricata (Bailey) Ralfs 
Leech (rrr). Long (1) (rrr). 
Micrasterias denticulata var. angulosa (Hantzsch) W. & G. S. 
West 
Little Dudley (rrr), Long (2) (rrr). 
Micrasterias apiculata var. fimbriata (Ralfs) Nords. 
Burned Rock (rrr), Clear (2) (rrr), Little Dudley (rrr). 
