18 A CATALOG OF ILLINOIS ALGAE 



Island, Whiteside). Eddy 193 IB, p. 460, as Microcystis aerugin- 

 osa and Microcystis flos-aquae (Pulaski); Eddy 1934, pp. 385, 

 386, 389, 394, 400, 403, as Microcystis aeruginosa (Lake, Macon, 

 Mason, McHenry, Whiteside). Daily 1938, p. 80, as Microcystis 

 aeruginosa (Cook). Transeau (Coles). Drouet & Daily, Field 

 Museum (Lake). Britton (Cook, Lake, McHenry). 



Carroll — Mississippi River (July, Sept.). Clark, Casey — reser- 

 voir pond (Sept.). Coles, Charleston — pond (July). Cook, Ar- 

 gonne Forest Preserve — Maple Lake, and a small pond, Sept. 8, 

 1939, #986, 1915; Evanston — Lake Michigan. Hancock, Dallas 

 City — Lake Keokuk (Mississippi River) (July, Sept.). Hender- 

 son, Jo Daviess — Mississippi River (July-Sept.). Lake, Antioch 

 — Petite Lake and Lake Marie, coll. by E. H. Ahlstrom, June 5, 

 1932; Channel between Grass Lake and Lake Marie, Petite 

 Lake, Aug. 25, 1939, #956, 958; Lake Marie— Channel Lake, 

 Lake Catherine, Bluff Lake, Lake Marie and connecting chan-, 

 nels, Sept. 14, 1939, #1028, 1029, 1032, 1033, 1035, 1040, 1047, 

 1048; Diamond Lake — in Diamond Lake, coll. by E. H. Ahl- 

 strom, June 5, 1932; Fox Lake— in Fox Lake and Pistakee Lake, 

 coll. by E. H. Ahlstrom, June 5, 1932; Grass Lake, Fox Lake, 

 Petite Lake and connecting channels, Aug. 25, 1939, #942, 943, 

 945, 950, 953, 954, 971; Halfday— DesPlaines River at Route 

 59A, July 29, 1938, #181. Lake Villa— Sand Lake ("summer"); 

 Lake Zurich — in Lake Zurich, coll. by E. H. Ahlstrom, June 5, 

 1932 ; Aug. 24, 1939, #913, 916; Long Lake— in Long Lake ("sum- 

 mer"); Volo— Fish Lake, Aug. 24, 1939, #935; Wauconda— 

 Bangs Lake and Slocum Lake, Aug. 24, 1939, #920, 926; Slocum 

 Lake, coll. by E. H. Ahlstrom, June 5, 1932. Macon, Decatur — 

 Lake Decatur (May-Aug.); park pond (June-Oct., Dec). Ma- 

 son, Havana — Illinois River (all months). McHenry — Fox 

 River; Greenwood— Nippersink Creek, Wonder Lake, July 6, 

 1939, #366, 368, 370. Mercer^Mississippi and Edwards Rivers 

 (July, Aug.). Rock Island, Whiteside — Mississippi and Rock 

 Rivers (July-Sept.). 



P. INCERTA Lemm. Daily, loc. cit., p. 640. f. 2, 3 (1942); Drouet & 



Daily, loc. cit., p. 73 (1939). 

 Microcystis incerta Lemm. 



Eddy 1931 B, p. 460, as Microcystis incerta: Pulaski, Wetaug — 

 sink-hole pond (July). 



SYNECHOCYSTIS Sauvageau, 1892 



S.' AQUATiLis Sauv. Geitlcr in Rab., Kryptog.-fl. Deutsch. 14: 270 



(1932). 



Solheim & Penfound 1928, p. 86: Champaign, Urbana — spring- 

 fed stream N. of (Aug.). 



