CLASSIFIED CATALOG OF ILLINOIS ALGAE 67 



215, 221 (Cook); 1931A, pp. 483, 486 (Cass, Macon, Piatt, 

 Sangamon); 1934, p. 387 as Sphinctocystis librilis (Champaign), 

 Daily 1938, p. 79 (Cook). 



Cass, Chandlerville — Sangamon River (Sept.). Champaign, 

 Mahomet — Sangamon River (July-Sept., Dec). Cook, Chicago, 

 Evanston — Lake Michigan (June-Nov.). Macon, Harristown — 

 Sangamon River (Sept.). Mason, Havana — IlHnois River 

 ("mainly winter"); Topeka — Quiver Creek (Sept.-Apr.). Piatt, 

 Monticello — Sangamon River (Sept.). Sangamon, Riverton — 

 Sangamon River (July). 



C. SOLEA var. apiculata (W. Sm.) Ralfs. Boyer, loc. cit. (1927). 

 Cymatopleura apiculata W. Smith 



Briggs 1872A, p. 43; Thomas & Chase 1887, p. 328, as C. api- 

 culata: Cook, Chicago — Lake Michigan. 



C. SOLEA var. subconstricta Muell. Mills, Index Diat., p. 540 



(1934). 



Transeau: Coles, Charleston — small streams (Oct., Mar.). 



C. SOLEA var. vulgaris Meist. Mills, loc. cit. (1934). 

 Transeau: Coles, Charleston — creek (Dec, Jan.). 



SURIRELLA Turpin, 1828 



S. ANGUSTA Kuetz. Boyer, Proc Acad. Nat. Sci. Phila. 79 (Supp. 2) : 

 542 (1927). 



Transeau: Coles, Dorans — ditch (May). Thomas & Chase 1887, 



p. 330: Cook, Chicago — Lake Michigan. 

 S. APICULATA W. Smith. Mills, Index Diat., pp. 1506, 1507 (1934). 



Transeau: Coles, Charleston — small streams (Jan., Mar., Apr.). 



Thomas & Chase 1887, p. 330: Cook, Chicago — Lake Michigan. 

 S. BiSERiATA Breb. Boyer, Proc. Acad. Nat. Sci. Phila. 79 (Suppl. 2) : 

 535 (1927). 



Thomas & Chase 1887, p. 330: Cook, Chicago — Lake Michigan. 

 S. BISERIATA var. BiFRONS (Ehr.) Hust. Hustedt in Pascher, Suess- 

 wass.-fl. Mitteleur. 10: 433. f. 833 (1930). 



Ahlstrom 1936, p. 292: Cook, Evanston — Lake Michigan. 

 S. DiDYMA Kuetz. Hustedt, loc. cit., p. 437. f. 848, 849 (1930). 



Ahlstrom 1936, p. 292: Cook, Evanston — Lake Michigan. 

 S. ELEGANS Ehr. Boyer, Proc. Acad. Nat. Sci. Phila. 79 (Suppl. 2): 

 537 (1927). 



Jelliffe 1893, p. 311: Cook, Chicago— Lake Michigan. 

 S. ELEGANS var. NORVEGICA (Eulenst.) Brun. Mills, Index Diat., pp. 

 1516, 1529 (1934). 



Surirella norvegica Eulenst. 



Thomas & Chase 1887, p. 330, as 5. norvegica: Cook, Chicago — • 



Lake Michigan. 



