112 A CATALOG OF ILLINOIS ALGAE 



River (July, Sept.). Eddy 1931 A, pp. 480, 483, 486: Cass, Chan- 

 dlerville — Sangamon River (June-Sept.). Galtsoff, loc. cit.: 

 Hanson, Henderson, Jo Daviess — Mississippi River (July- 

 Sept.). Eddy, loc. cit.: Macon, Decatur — Lake Decatur (June, 

 July); Harristown — Sangamon River (July). Kofoid 1908, pp. 

 23, 24, 292, 315: Mason, Havana — Illinois River (Jan., May- 

 Nov.). Eddy, loc. cit.: Menard, Petersburg — Sangamon River 

 (July, Sept.). Galtsoff, loc. cit.: Mercer — Mississippi and Ed- 

 wards Rivers (July, Aug.). Rock Island — ^Mississippi River 

 (July-Sept.). Eddy, loc. cit.: Sangamon, Illiopolis, Riverton, 

 Springfield — Sangamon River (July, Sept.). GaltsofT, loc. cit.: 

 Whiteside — Mississippi River (July, Sept.). 

 A. HANTZSCHii var. fluviatile Schroed. Tiffany, loc. cit. (1934). 

 Britton: Cook, Park Ridge — DesPlaines River at Touhy Ave., 

 July 12, 1939, #452. McHenry, Greenwood — Nippersink Creek 

 near Thayer School, July 7, 1939, #432. 



CRUCIGENIA Morren, 1830 



C. IRREGULARIS Wille. Tififany, loc. cit., p. 70. pi. 8. f. 154 (1934). 

 Britton: Cook, Evanston — gravel-pit pond at Simpson St. and 

 Grosse Point Road, Oct. 3, 1938, #212; Park Ridge— gravel-pit 

 pond and swamp, July 12, 1939, #454; Sag Bridge^ — small pond 

 and extensive swamp, Sept. 8, 1939, #1016. McHenry, Green- 

 wood — swamp in Game Preserve 2 miles N.W., July 6, 1939, 

 #395, 396; Woodstock — small pond about 1 mile S.E., July 7, 

 1939, #425. Eddy 1931B, p. 461: Pulaski, Wetaug— sink-hole 

 pond (July). 



C. LAUTERBORNEi Schmid. Tiffany, loc. cit., f. 158 (1934); Smith, 



Freshw. Alg. U. S., p. 519 (1933). 

 Staurogenia lauterbornei Schmid. 



Britton: Cook, Palos Park — Calumet Sag Channel at Kean Ave., 

 July 14, 1939, #559. Kofoid 1908, p. 34, as Staurogenia lauter- 

 bornei: Mason, Havana — Illinois River. 



C. RECTANGULARis (Naeg.) Gay. Tiffany, loc. cit., f. 155 (1934). 



Transeau 1913B, p. 80: Coles, Charleston — pond (Sept.). Kofoid 

 1908, pp. 23, 25, 292, 315: Mason, Havana— Illinois River (May- 

 Feb.). 



C. TETRAPEDiA (Kirch.) W. & G. S. West. Tiffany, loc. cit., f. 149, 150 



(1934); Brunnthaler in Pascher, Suesswass.-fl. Deutsch 5(2): 174. f. 



251 (1915). 



Tetrapedia emarginata Schroed 



Kofoid 1908, p. 22, as Tetrapedia emarginata: Mason, Havana — 

 Illinois River (Aug.-Oct.). 



