CLASSIFIED CATALOG OF ILLINOIS ALGAE 103 



(July, Sept.). Baker 1922, pp. 80, 84: Champaign, Urbana— 

 Boneyard Creek and Salt Fork. Galtsoff, loc. cit.: Hancock — 

 Mississippi River. Henderson, Jo Daviess— Mississippi River 

 (July-Sept.). Britton: Lake, Antioch — Grass Lake-Lake Marie 

 Channel, Sept. 14, 1939, #1028, 1029; Klondike— Grass Lake- 

 Fox Lake Channel and Fox Lake, Aug. 25, 1939, #948, 950; 

 Libertyville— DesPIaines River at Route 59A, July 29, 1938, 

 #181. Eddy 1931A, pp. 483, 486: Macon— Lake Decatur (July). 

 Menard, Petersburg — Sangamon River (Sept.). Galtsoff, loc. 

 cit.: Mercer, Rock Island, Whiteside— Mississippi River (July- 

 Sept.). Purdy 1930, pp. 68, 69, 72: Will, Lockport— DesPIaines 

 River (June- Nov.). 

 P. SIMPLEX var. DUODENARIUM (Bail.) Rab. Tiffany, loc. cit., f. 139 



(1934). 



Collins 1909, p. 177: ? County, Britton: Cook, Palos Park — 

 Calumet Sag Channel at Kean Ave., July 14, 1939, #559; Sag 

 Bridge — stone quarry and other small ponds, Sept. 8, 1939, 

 #1007, 1011, 1014. Lake, Fox Lake— Fox, Grass, Marie, Channel, 

 Nippersink and Petite Lakes and connecting channels, July 25, 

 Aug. 25, Sept. 14, 1939, #602, 604, 942, 943, 945, 948, 950, 953, 

 958, 959, 1029, 1035; Halfday— gravel pit E. of, Aug. 8, 1939, 

 #772; Volo— Fish Lake, Aug. 24, 1939, #935, 936; Wauconda— 

 Bangs and Slocum Lakes, Aug. 24, 1939, #923, 926. McHenry, 

 Johnsburg— Pistakee Lake, July 25, 1939, #595, Fox River at 

 Pistakee Lake, July 25, 1939, #592; Richmond— S. end of South 

 Twin Lake (Lake Elizabeth), Aug. 2, 1939, #729. 



P. TETRAS (Ehr.) Ralfs. Tiffany, loc. cit., f. 132; DeToni, Sylloge Al- 



garum 1(2): 581 (1889). 



Pediastrum ehrenhergii A. Br. 



Collins 1909, p. 179; Transeau 1913B, p. 81 : Coles, Charleston- 

 ponds (June, Nov.). Johnson & Atwell 1890, p. 19, as P. ehren- 

 hergii; Britton: Cook— "Big Ditch" (Sept.); Argonne Forest 

 Preserve— swamp at 95th St. & 104th Ave., July 13, 1939, #488, 

 502, 503, Sept. 8, 1939, #984, small ponds, July 13, 1939, #515, 

 520, 525, 529, 533, swamps at 95th St. & 96th Ave., Kean Ave. 

 between 87th & 95th Sts. and 131st St. W. of Wolf Road, July 13, 

 1939^ #477, 497, 541, 543, 1018; Evanston— small pond in Cal- 

 vary Cemetery, and small greenhouse reservoir, June 23, 1938, 

 #74, 75; Glenview — swamp and temporary pond about 1| miles 

 W., June 23, 1938, #97; Goeselville — pond at Mascouten Forest 

 Preserve, July 14, 1939, #578, 588; Morton Grove — small pond 

 about 1 mile N.W., May 10, 1938, #43; Northbrook— small 

 ponds at Somme Forest Preserve, June 27, 1938, #112, 115, 

 May 8, 1939, #241, 243, July 3, 1939, #350, small pond on Techny 

 Road \ mile W. of Landwehr Road, June 27, 1938, #110; Palos 



