26 A CATALOG OF ILLINOIS ALGAE 



A. ciRCiNALis Rab. ex B. & F. Geitler, loc. cit., p. 891. f. 572a (1932). 

 Galtsoff 1924, p. 399 (Hancock, Henderson). Eddy 1927B, pp. 

 214, 218 (Cook); 1931B, p. 460 (Pulaski); 1934, pp. 385, 391, 

 400, 403 (Cook, Lake, Macon, McHenry, Whiteside). Britton 

 (Cook, Lake, McHenry). 



Cook, Argonne Forest Preserve — Maple Lake, Sept. 8, 1939, 

 5f986; Chicago — Lake Michigan (July); Sag Bridge — small pond, 

 Sept. 8, 1939, #1015. Hancock, Henderson, Mississippi River 

 (July). Lake, Antioch — channel between Lake Marie and Chan- 

 nel Lake, Sept. 14, 1939, #1033 {fide Dr. F. Drouet), Bluff Lake, 

 Sept. 14, 1939, #1048; Fox Lake— in Fox Lake, Petite Lake, 

 Aug. 25, 1939, #950, 954, 956; Long Lake— in Long Lake ("sum- 

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

 in Lake Decatur, Sangamon River (June-Sept.). McHenry — 

 Fox River; Ridgefield — pond about 1 mile N.W., July 7, 1939, 

 #417. Pulaski, Wetaug— sink-hole ponds (July-Sept.). White- 

 side — Rock River. 



A. FLOS-AQUAE (Lyngb.) Breb. ex B. & F. Geitler, loc. cit., p. 890. f. 



571a-b (1932). 



Galtsoff 1924, pp. 399, 402, 405: Carroll— Mississippi River 

 (July, Sept.). Transeau 1913B, p. 72: Clark, Casey — reservoir 

 pond (Sept.). Britton: Cook, Argonne Forest Preserve — Maple 

 Lake, Sept. 8, 1939, #986 {fide Dr. F. Drouet). Transeau, loc. cit. 

 (1913B): Cumberland, Greenup — pond (July). Galtsoff, loc. cit. 

 (1924): Hancock, Henderson, Jo Daviess, Mercer, Rock Island, 

 Whiteside— Mississippi River (July-Sept.). 



A. iNAEQUALis (Kuctz.) B. & F. Geitler, loc. cit., p. 896. f. 578 (1932). 

 Anahaena laxa (Rab.) A. Br. 



Solheim & Penfound 1928, p. 87: Champaign, Urbana— small 

 stream N. of (Apr.). Transeau 1913B, p. 72, also as A. laxa: 

 Clark, Casey — prairie pond (Apr.). Coles, Charleston — ponds 

 (May, June, Oct., Nov.). Britton: Cook, Sag Bridge — small 

 pond, Sept. 8, 1939, #996 (fide Dr. F. Drouet). Transeau, loc. 

 cit. (1913B): Douglas, Arthur — pond (July). 



A. osciLLARioiDES Bory ex B. & F. Geitler, loc. cit., p. 886. f. 567e 



(1932). 



Tilden 1910, p. 194; Drouet, Field Mus.: Cook, Evanston— 

 Willow Springs, in shallow water of lake E. of, coll. by P. C. 

 Standley, J. A. Steyermark and F. Drouet, Oct. 18, 1938. 



A. PLANCTONICA Brunnth. Geitler, loc. cit., p. 881. f. 562 (1932). 



Galtsoff 1924, pp. 399, 405: Carroll, Henderson, Jo Daviess, 

 Mercer — Mississippi River (July, Aug.). Eddy 1931B, pp. 454, 

 460: Pulaski, Wetaug — sink-hole ponds (July-Sept., Dec). 

 Galtsoff, loc. cit. (1924): Rock Island, Whiteside^ — Mississippi 

 River (July, Aug.). 



