60 A CATALOG OF ILLINOIS ALGAE 



G. ACUMINATUM var. TURRis (Ehr.) CI. Boyer, loc. cit. (1927). 

 Gomphonema turris Ehr. 



Thomas & Chase 1887, p. 329, as G. turris: Cook, Chicago — Lake 

 Michigan. 



G. ANGUSTATUM (Kuetz.) Grun. Boyer, loc. cit., p. 294 (1927). 



Transeau 1916, p. 775: Clark, Whetstone Creek (Oct.). Coles, 

 Ashmore, Charleston, Dorans, Embarrass, Loxa — ponds, Indian 

 Creek and other small streams and ditches (Nov.-May); Mat- 

 toon — swamp (Apr.). Cumberland, Greenup — ditch (Nov.). 

 Lawrence, Pinkstaff — pond (Nov.). 



G. ANGUSTATUM var. OBTUSATUM (Kuetz.) V. H. Boyer, loc. cit., p. 



295 (1927). 



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



G. CONSTRICTUM Ehr. Boyer, loc. cit., p. 292 (1927). 



Transeau: Clark — Whetstone Creek (Oct.). Coles, Charleston — 

 small stream (Oct.). Cumberland, Greenup — ditch (Nov.). 

 Kofoid 1903, p. 516; 1908, p. 52: Mason, Havana— Illinois River 

 ("irregular — most abundant in May and Nov."); Topeka — 

 Quiver Creek (Apr., Nov.). 



G. CONSTRICTUM var, CAPITATUM (Ehr.) Grun. Hustedt in Pascher, 

 Suesswass.-fl. Mitteleur. 10: 377. f. 715 (1930); Mills, Index Diat. 

 pp. 779, 881 (1934). 



Gomphonema capitatum Ehr. 



Briggs 1872A, p. 43; Thomas & Chase 1887, p. 329, as G. capi- 

 tatum: Cook, Chicago — Lake Michigan. 



G. CONSTRICTUM var. CAPITATUM f. TURGIDUM (Ehr.) A. Mayer. Mills, 

 loc. cit., pp. 781, 805 (1934). 

 Gomphonema turgidum Ehr. 



Thomas & Chase 1887, p. 329, as G. turgidum: Cook, Chicago — 

 Lake Michigan. 



G. GEMINATUM (Lyngb.) Ag. Boyer, Proc. Acad. Nat. Sci. Phila. 79 



(Suppl. 2): 289 (1927). 



Briggs 1872A, p. 43; Thomas & Chase 1887, p. 329: Cook, Chi- 

 cago — Lake Michigan, 



G. GRACILE var. DICHOTOMA (Kuetz.) Grun. Mills, Index Diat., pp. 



783, 787 (1934). 



Gomphonema dichotomum W. Smith 



Briggs 1872 A, p. 44; Thomas & Chase 1887, p. 329, as G. dichoto- 

 mum: Cook, Chicago — Lake Michigan. 



G. INTRICATUM Kuetz. Boyer, Proc. Acad. Nat. Sci. Phila 79 (Suppl. 

 2): 295 (1927). 



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



Thomas & Chase 1887, p. 329: Cook, Chicago — Lake Michigan. 



