104 A CATALOG OF ILLINOIS ALGAE 



Park — pond, July 14, 1939, #566; Schnells Corner — ponds at 

 Elk Grove Forest Preserve, June 22, 1939, #327, Aug. 8, 1939, 

 #790; Wheeling — DesPIaines River at Dam #2 (Foundry Road), 

 Aug. 8, 1939, #780. Britton: Lake, Highland Park — small pond 

 at Euclid Hills C. C, June 27, 1938, #118; McHenry, Johnsburg 

 —Fox River, July 25, 1939, #590; McHenry— swamp E. of 

 McCuIlom Lake, July 6, 1939, #374. Eddy 1931B, p. 461: 

 Pulaski, Wetaug — sink-hole pond (July). Purdy 1930, pp. 68, 

 69, 72: Will, Lockport — DesPIaines River (June-Nov.). 



P. TETRAS var. TETRAODON (Corda) Hansg. Tiffany, loc. cit., p. 51. f. 



133 (1934). 



Britton 1940, p. 71: Cook, Evanston — gravel pit at Simpson St. 

 and Grosse Point Road, Oct. 3, 1938, #212; Morton Grove- 

 small pond about 1 mile N.W., May 10, 1938, #43; Palos Park- 

 shallow ponds, July 13, 1939, #535, 540, swamp, Sept. 8, 1939, 

 #982; Sag Bridge— swamp, Sept. 8, 1939, #984; stone quarry 

 pond and small pond in extensive swamp, Sept. 8, 1939, #1008, 

 1016, 1021. Britton: Lake, Waukegan — in Dead River at Dunes 

 Park, May 11, 1939, #255; Fox Lake— Fox Lake, Aug. 25, 1939, 

 #951, channel entering E. side of Grass Lake, Aug. 25, 1939, 

 #971; Lake Zurich— in Lake Zurich, Aug. 24, 1939, #916; Wau- 

 conda— Bangs Lake, Aug. 24, 1939, #925. McHenry, Harvard- 

 small pond about 2 miles N.E., July 8, 1939, #436; Richmond— 

 S. end of South Twin Lake (Lake Elizabeth), Aug. 2, 1939, #725. 



SORASTRUM Kuetzing, 1845 



S. spiNULOSUM Naeg. Tififany, loc. cit., p. 51. pi. 7. f. 129 (1934). 



Transeau 1913B, p. 81: Coles, Ashmore, Charleston, Lerna — 

 ponds (May-July, Oct.). Britton: Cook, Argonne Forest Pre- 

 serve— Tuma Lake, July 14, 1939, #551; Northbrook— small 

 pond in Somme Forest Preserve, July 3, 1939, #350; Palos Park 

 —small ponds, July 14, Sept. 8, 1939, #578, 978; Sag Bridge- 

 ponds and swamps, July 13, 1939, #488, 493, 504, 510, 515, 526, 

 Sept. 8, 1939, #988, 998, 1016, 1018, 1021; Schnells Corner— 

 small ponds in Elk Grove Forest Preserve, June 23, 1938, #95, 

 June 22, Aug. 8, 1939, #321, 322, 324, 327, 780, 790. Lake, Lake 

 Zurich— in Lake Zurich, Aug. 24, 1939, #913; Volo— bog at 

 Tamarack Farm, June 3, 1939, #294. McHenry, Harvard- 

 swamps and small pond about 2 miles E., July 8, 1939, #434, 436; 

 McHenry — swamp on E. side of McCullom Lake, July 6, 1939, 

 #374-376, small stream draining into Defiance Lake, Aug. 24, 

 1939, #934. 



