76 A CATALOG OF ILLINOIS ALGAE 



S. FLACCiDUS (Kuetz.) Gay. Hazen, loc. ciL, p. 164. pi. 21. f. 14-17 



(1902). 



Transeau 1913B, p. 81 : Clark, Casey — on soil (May). Coles, 

 Charleston — on soil (July, Sept., Oct.), small creek (May); 

 Humboldt — ditch (Apr.); Mattoon— swamp (Apr.). 



S. suBTiLis (Kuetz.) Klerck. Hazen, loc. cit., p. 162. pi. 21. f. 10-13 



(1902). 



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

 stream N. of (May). Transeau 1913B, p. 81 : Coles, Charleston — 

 small streams, ponds, pools, ditches and swamps (Mar., Apr.), 

 laboratory aquarium (Mar.). Drouet, Field Mus. : Dupage — in a 

 rain pool in mud flats of Illinois River opposite Lemont, coll. by 

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



ULOTHRIX Kuetzing, 1833 



U. TENERRiMA Kuetz. Hazcn, loc. cit., p. 151. f. 3-4 (1902). 



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

 reservoir, May 10, 1938, #42. Britton: Will, Manteno— ditch on 

 Route 44 about 5 miles N.W., Apr. 18, 1938, #6. 



U. VARIABILIS Kuetz. Hazen, loc. cit., p. 152. f. 5-7 (1902). 



Transeau 1913B, p. 81; 1913C, p. 2>3: Coles, Charleston— small 

 creek, pools, ditches and drain-tile (Mar., Apr., Oct.). Britton 

 1940, p. 71: Cook, Morton Grove^ — small pond about 1 mile 

 N.W., May 10, 1938, #43. Britton: Kankakee, Kankakee— 

 slough along Route 49, about 5 miles N., Apr. 18, 1938, #5. 



U. ZONATA (Weber & Mohr) Kuetz. Hazen, loc. cit., p. 147. pi. 20. f. 



1-4 (1902). 



Johnson & Atwell 1890, p. 19; Britton 1940, p. 71: Cook, Evans- 

 ton — Lake Michigan (Nov.); Morton Grove — small pond, May 

 10, 1938, #42; Palos Park— swamp, Sept. 8, 1939, #975. Forbes & 

 Richardson 1913, pp. 502, 503, 506: Grundy, Dresden Heights — 

 DesPlaines River (Sept.). Agersborg 1930, p. 106: Macon, De- 

 catur — warm waste-water ditch (Dec.-Feb.). Forbes & Richard- 

 son, loc. cit.: Will, Lockport — Sanitary Canal and DesPlaines 

 River (Sept.). 



Family: MICROSPORACEAE 



• MICROSPORA Thuret, 1850; Lagerheim, 1888 



M. FLOCCOSA (Vauch.) Thur. Hazen, loc. cit., p. 173. pi. 24. f. 1-4 

 (1902). 



Transeau: Montgomery, Coffeen — (May). 

 M. PACHYDERMA (Wille) Lag. Collins, Tufts Coll. Stud. 2(3): 193. 

 (1909). 



Transeau: Clark, Casey — pondJ(Apr.). 



