110 A CATALOG OF ILLINOIS ALGAE 



gracile: Macon — Lake Decatur (Sept.)- Britton: McHenry, 

 Greenwood — Wonder Lake, July 6, 1939, #368; Richmond — 

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



TETRAEDRON Kuetzing, 1845 



T. BIFURCATUM (Wille) Lag. Brunnthaler in Pascher, Suesswass.-fl. 



Deutsch. 5(2): 156. f. 194 (1915). 

 Polyedrium bifurcatum Wille 



Transeau: Coles, Charleston — ponds (July, Oct.). Kofoid 1908, 

 p. 30, as Polyedrium bifurcatum: Mason, Havana — Illinois 

 River ("summer"). 



T. GiGAS (Wittr.) Hansg. Brunnthaler, loc. ciL, p. 148. f. 159 (1915). 

 Polyedrium gigas Wittr. 



Johnson & Atwell 1890, p. 19, as Polyedrium gigas: Cook, Lake- 

 side — (May). 



T. GRACILE (Reinsch) Hansg. Brunnthaler, loc. cit., p. 157. f. 201 



(1915). 



Polyedrium grafile Reinsch 



Kofoid 1908, p. 30, as Polyedrium gracile: Mason, Havana — 

 Illinois River ("summer"). Eddy 1931B, p. 461 : Pulaski, Wetaug 

 ■ — sink-hole pond (July, Sept.). 



T. LIMNETICUM Borgc. Tiffany, Contrib. Franz T. Stone Lab. 6: 63. 



pi. 11. f. 256-257 (1934). 



Britton: Lake, Wauconda— Slocum Lake, Aug. 24, 1939, #926. 



T. LOBULATUM (Naeg.) Hansg. Tiffany, loc. cit., f. 253 (1934). 



Eddy 1931B, p. 461: Pulaski, Wetaug — sink-hole pond (Sept.). 



T. MINIMUM (A. Br.) Hansg. Tiffany, loc. cit., p. 64. f. 233 (1934). 



Britton: Cook, Evanston — small pond in Calvary Cemetery, 

 June 23, 1938, #74; Morton Grove — small pond about 1 mile 

 N.W., May 10, June 23, 1938, #43, 77; Northbrook— small pond 

 on Techny Road about § mile W. of Landwehr Road, June 27, 

 1938, #110; Palos Park— swamp, July 13, 1939, #477; Sag Bridge 

 —swamps, July 13, Sept. 8, 1939, #488, 1016, 1018. Lake, Fox 

 Lake— in Nippersink Lake, July 25, 1939, #599; Wauconda— 

 Bangs Lake, Aug. 24, 1939, #925. McHenry, Richmond— S. end 

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



T. MINIMUM f. TETRALOBULATUM Reiusch. Brunnthaler in Pascher, 



Suesswass.-fl. Deutsch. 5(2): 148 (1915). 



Britton: Cook, Techny — ^small pond about 1^ miles S.W., May 

 12, 1938, #64. 



T. MUTICUM f. PUNCTULATUM Reinsch. Brunnthaler, loc. cit., p. 147 



(1915). 



Collins 1909, p. 163. 



