CLASSIFIED CATALOG OF ILLINOIS ALGAE • 89 



O. CRENULATOCOSTATUM var. CYLINDRICUM (Him) Tiff. Tiffany, loc. 



ciL, f. 207 (1937). 



Transeau 1913B, p. 83: Clark, Casey — pond (Oct.). Cumberland, 

 Greenup — ditch (Nov.). Montgomery, Coffeen — pond (June). 

 Moultrie, Sullivan — artificial pond (July). Tiffany 1930, p. 93; 

 1937, p. 42. 



O. CRISPUM (Hass.) Wittr. Tiffany, loc. cit., p. 52. pi. 22. f. 336, 337 



(1937). 



Transeau 1913B, p. 83: Coles, Ashmore — pond (May); Charles- 

 ton, Lerna — ponds (Apr.-June). Britton: Cook, Glenview — 

 temporary ponds and swamps about 1| miles W., May 12, 1938, 

 #53, 56; Niles— small pond about 1 mile N., May 10, 1938, #50; 

 Northbrook — small ponds and swamps at Somme Forest Pre- 

 serve, May 15, 1938, May 8, 1939, #65, 67, 68, 240, 241, small 

 ponds and swamps on Techny Road just E. and W. of Landwehr 

 Road, May 12, 1938, June 27, 1938, #62, 63, 109; Park Ridge- 

 gravel pit pond and swamp, May 10, 1938, #47; Techny — 

 intermittent slough along C. & N. R. R., May 12, 1938, #61; 

 small pond about 2 miles S.W., June 27, 1938, #108. Transeau: 

 Douglas, Tuscola — pond (May). Britton : Lake, Everett — small 

 pond about 1 mile S., May 15, 1938, #71. Transeau : Lawrence, 

 Lawrenceville — gravel pit (Apr., May). Montgomery, Coffeen — 

 pond (May). Tiffany 1930, p. 113; 1937, p. 52; 1939, p. 91. 



O. CRISPUM var. gracilescens Wittr. Tiffany, loc. cit., p. 53. f. 338 



(1937). 



Transeau: Coles, Charleston, Dorans — pond and pools (Apr.- 

 June). Montgomery, Coffeen — ponds (May). Tiffany 1930, p. 

 114; 1937, p. 53. 



O. CROASDALEAE Jao. Tiffany, loc. cit., p. 69. pi. 26. f. 416-419 (1937). 

 Britton 1942, p. 58: Cook, Glenview — small intermittent ponds 

 and swamps about 1^ miles W., May 12, 1938, #53, 56. 



O. CRYPTOPORUM Wittr. Tiffany, loc. cit., p. 27. pi. 8. f. 104 (1937). 

 Transeau: Coles, Charleston — ponds. Johnson & Atwell 1890, 

 p. 19: Cook— ditches (May). Tiffany 1937, p. 27; 1939, p. 91. 



O. CURVUM Pringsh. Tiffany, loc. cit., f. 89, 90 (1937). 

 Tiffany 1937, p. 29; 1939, p. 91. 



O. CYATHIGERUM Wittr. Tiffany, loc. cit., p. 62. pi. 35. f. 541, 542 



(1937). 



Transeau 1913B, p. 83: Coles, Charleston, Lerna — ponds (May, 

 June). Jasper, Newton, Wheeler — ponds (May, Aug.). Mont- 

 gomery, Coffeen— pond (May). Tiffany 1930, p. 133; 1937, p. 62; 

 1939, p. 91. 



O. DECIPIENS Wittr. Tiffany, loc. cit., p. 68. pi. 24. f. 383 (1937). 

 Transeau: Montgomery, Coffeen — pond (May). 



