62 A CATALOG OF ILLINOIS ALGAE 



C. AMPHICEPHALA Naeg. Boyer, loc. cit., p. 275 (1927). 

 Transeau: Coles, Charleston — small stream (Oct.)- 



C. ASPERA (Ehr.) CI. Boyer, loc. cit., p. 278 (1927). 

 Cymhella gastroides Kuetz. 



Transeau, as C. gastroides: Coles, Charleston — ponds, ditches 

 and small streams (Mar.-May, Nov.). Thomas & Chase 1887, 

 p. 328, as C. gastroides: Cook, Chicago — Lake Michigan. 



C. CISTULA var. maculata (Kuetz.) Grun. Boyer, loc. cit., p. 280 



(1927); Mills, Index Diat., pp. 548, 560 (1934). 

 Cymhella maculata Kuetz. 



Thomas & Chase 1887, p. 328, as C. maculata: Cook, Chicago- 

 Lake Michigan. 



C. cusPiDATA Kuetz. Boyer, loc. cit., p. 275 (1927). 



Briggs 1872A, p. 43; Thomas & Chase 1887, p. 328; Ahlstrom 

 1936, p. 291: Cook, Chicago, Evanston — Lake Michigan. Agers- 

 borg 1930, pp. 106, 113: Macon, Decatur — warm waste-water 

 ditch (Dec.-Feb.). 



C. CYMBiFORMis (Kuctz.) Breb. Boyer, loc. cit., p. 279 (1927). 



Thomas & Chase 1887, p. 328: Cook, Chicago— Lake Michigan. 



C. EHRENBERGii Kuetz. Boycr, loc. cit., p. 275 (1927). 



Thomas & Chase 1887, p. 328: Cook, Chicago— Lake Michigan. 



C. GRACILIS (Rab.) CI. Boyer, loc. cit., p. 284 (1927). 

 Transeau: Clark — Whetstone Creek (Oct.). 



C. LACUSTRis (Ag.) CI. Boyer, loc. cit. (1927). 

 Colletonema lacustre V. H. 



Transeau: Coles — Indian Creek (Nov.). Thomas & Chase 1887, 

 p. 328, as Colletonema lacustre: Cook, Chicago — Lake Michigan. 



C. LAEVis Naeg. Hustedt in Pascher, Suesswass.-fl. Mitteleur. 10: 353. 



f. 643 (1934). 



Ahlstrom 1936, p. 291: Cook, Evanston — Lake Michigan. 



C. LANCEOLATA (Ehr.) V. H. Hustcdt, loc. cit., p. 364. f. 679 (1930). 

 Thomas & Chase 1887, p. 328: Cook, Chicago— Lake Michigan. 



C. LEPTOCEROS (Ehr.?) Grun. Hustedt, loc. cit., p. 358 (1930). 



Thomas & Chase 1887, p. 328, as C. leptoceros K. : Cook, Chicago 

 — Lake Michigan. 



C. NAVicuLiFORMis Aucrsw. Boycr, Proc. Acad. Nat. Sci. Phila. 79 



(Suppl. 2): 281 (1927). 

 Cymhella anglica Lagerst. 



Thomas & Chase 1887, p. 328, also as C. anglica; Ahlstrom 1936, 

 p. 291 : Cook, Chicago, Evanston — Lake Michigan. 



C. PARVA (W. Sm.) CI. Boyer, loc. cit. (1927). 



Thomas & Chase 1887, p. 328: Cook, Chicago— Lake Michigan. 



