CLASSIFIED CATALOG OF ILLINOIS ALGAE 109 



23, 1938, #77; Northbrook — small pond on Techny Road ^ mile 

 W. of Landwehr Road, June 27, 1938, #110, small' ponds at 

 Somme Forest Preserve, June 27, 1938, #112, May 8, 1939, #243. 



O. ELLIPTICA W. West. Tiffany, loc. ciL, f. 218 (1934). 



Britton 1940, p. 71: Cook, Morton Grove — small pond about 

 1 mile N.W., May 10, 1938, #43, June 23, 1938, #77. 



O. GiGAS Arch. Brunnthaler in Pascher, Suesswass.-fl. Deutsch. 5(2): 



127. f. 105 (1915). 



Transeau: Clark, Casey — pond (Nov.). 



O. NAEGELii A. Br. Brunnthaler, loc. ciL, f. 108 (1915). 



Kofoid 1908, pp. 23, 25: Mason, Havana— Illinois River (Mar., 

 May-Sept., Dec). 



O. SOLITARIA Wittr. Tiffany, Contrib. Franz T. Stone Lab. 6: 59. pi. 



10. f. 212 (1934). 



Transeau: Clark, Casey— pond (July, Nov.). Coles, Charleston 

 — pond (Apr.). Britton: Lake, Fox Lake — channel entering E. 

 side of Grass Lake, Aug. 25, 1939, #971. Kofoid 1908, pp. 23, 26: 

 Mason, Havana — Illinois River ("probably throughout the 

 year"). 



O. SOLITARIA f. MAJOR Wille. Brunnthaler in Pascher, Suesswass.-fl. 



Deutsch. 5(2): 125 (1915). 



Transeau 1913B, p. 80: Clark, Casey— pond (Sept., Nov.). 



SCHROEDERIA Lemmermann, 1899 



S. SETIGERA (Schroed.) Lemm. Tiffany, Contrib. Franz T. Stone Lab. 



6: 62. pi. 9. f. 172 (1934). 



Kofoid 1908, pp. 23, 33, 292, 316: Mason, Havana— Illinois 

 River (all months). Eddy 1931 A, p. 486: Piatt, Monticello— 

 Sangamon River (Sept.). 



SELENASTRUM Reinsch, 1867 



S. BIBRAIANUM Reinsch. Tiffany, loc. cit., p. 60. f. 198 (1934). 



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

 July 14, 1939, #559. Kofoid 1908, pp. 34, 316: Mason, Havana- 

 Illinois River (Aug.-Nov.). 



S. BIBRAIANUM var. GRACILE (Reinsch) Tiff. & Ahl. Tiffany, loc. cit., f. 



197 (1934). 



Selenastrum gracile Reinsch 



Britton : Cook, Argonne Forest Preserve — swamp at 95th St. and 

 104th Ave., July 13, 1939, #502, 503; Palos Park— Calumet Sag 

 Channel at Kean Ave., July 14, 1939, #559. Lake, Antioch— 

 Grass Lake-Lake Marie Channel, Sept. 14, 1939, #1028; Fox 

 Lake— in Nippersink Lake, July 25, 1939, #602; Wauconda— 

 ■ Bangs Lake, Aug. 24, 1939, #924. Eddy 1931A, p. 486, as S. 



