Smith—Phytoplankton of the Muskoka Region . 
341 
Sorastrum americanum (Bohlin) Schmidle 
Butterfly (rrr), Clear (2) (rrr), Harbon (rrr). 
Family HYDRODICTYACEAE 
PEDIASTRUM Meyen 1829 
Pediastrum integrum Nag. 
Marion (rrr). 
Pediastrum araneosum Racib. 
Bu-rned Rock (rrr), Clear (2) (rrr), Cornell (rrr), Cull (1) (rrr), Hen- 
shaw (rrr), Lake of Bays (rrr), Little Dudley (r), Long (1) (rr), Long 
(2), (rrr), Marion (rrr), Muskoka (rrr), Nine Mile (rr), Pennsylvania 
(rrr), Rowley (rrr), St. Mary (rrr), Silver (1) (rrr), Strange (rrr), 
Vernon (rrr), White (rrr). 
Pediastrum Boryanum (Turp.) Menegh. 
Big Dudley (rrr), Butterfly (rrr), Gull (1) (rrr), Joseph (rrr), Long 
(2) (rrr), Mill (rrr), Nine Mile (rrr), Silver (1) (rrr). 
var. longicorne Racib. 
Clear (2) (rrr). 
Pediastrum duplex Meyen 
Gull (1) (rrr), Long (1) (rrr), Pine (rrr), Muskoka (rrr), St. Mary 
(rrr), Silver (1) (rr). 
var. clathratum (A. Br.) Lag. 
Big Dudley (rr), Black (1) (r), Brush (sss), Burned Rock (r), Loon 
(rr), Mill (rr), Rowley (rr), Vernon (rrr). 
var. reticulatum Lag. 
Cornell (rr),Echo, (rrr), Gull (2) (rrr), Pine (rrr), White (rrr). 
var. gracillimum W. & G. S. West 
Butterfly (r), Harbon (r). 
var. cohaerens Bohlin 
Butterfly (rrr), Cornell (rrr), Harbon (rr), Vernon (rrr). 
Pediastrum tetras (Ehr.) Ralfs 
Big Dudley (rrr), Black (1) (rrr), Brush (rrr), Cornell (rrr), Harbon 
(rrr), Joseph (rrr), Leech (rrr), Long (1) (rrr), Marion (rrr), Round 
(2) (rrr), Rowley (rrr), St. Mary (rrr), Silver (1) (rrr), White (rr).. 
Vernon (rrr). 
