CLASSIFIED CATALOG OF ILLINOIS ALGAE 49 



as C. communis: Mason, Havana — Illinois River (all months); 



Topeka — Quiver Creek (Oct., Dec.)- 

 C. PLACENTULA Ehr. Boyer, loc. cit. (1927). 



Transeau: Coles, Charleston — ponds and small streams (Oct.- 



Dec, Mar.). Eddy 1927B, pp. 208, 220: Cook, Chicago— Lake 



Michigan (May). 

 C. PLACENTULA var. LiNEATA (Ehr.) CI. Boyer, loc. cit. (1927); Mills, 

 Index Diat., pp. 425, 432 (1934). 

 Cocconeis lineata Ehr. 



Thomas & Chase 1887, p. 328, as C. lineata Kuetz.(?): Cook, 



Chicago — Lake Michigan. 



RHOICOSPHENIA Grunow, 1860 



R. CURVATA (Kuetz.) Grun. Boyer, loc. cit., p. 240 (1927). 

 Gomphonema curvatum Kuetz. 



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

 Briggs 1872A, p. 44, asGomphonema curvatum ; Thomas & Chase 

 1887, p. 330: Cook, Chicago — Lake Michigan. 



Suborder: NAVICULINEAE 

 Family: NAVICULACEAE 



AMPHIPLEURA Kuetzing, 1844 



A. PELLUCIDA (Ehr.?) Kuetz. Boyer, loc. cit., p. 303 (1927). 



Transeau: Coles, Charleston — pond (Oct.). Briggs 1872A, p. 42; 

 Thomas & Chase 1887, p. 328: Cook, Chicago — L^ke Michigan. 



AMPHIPRORA Ehrenberg, 1843; Cleve, 1891 



A. CALUMETICA Thomas. Boyer, loc. cit., p. 486 (1927). 



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

 A. ORNATA Bailey. Boyer, loc. cit., p. 484 (1927). 



Babcock 1872A, p. 13; 1872B, p. 104; Briggs 1872A, p. 42; 



Thomas & Chase 1887, p. 328; Eddy 1927B, pp. 215, 220; Daily 



1938, p. 79: Cook, Chicago, Evanston — Lake Michigan (July). 



ANOMOEONEIS Pfitzer, 1871 



A. EXiLis (Kuetz.) CI. Boyer, loc. cit., p. 326 (1927). 

 Navicula exilis Kuetz. 



Briggs 1872A, p. 44; Thomas & Chase 1887, p. 329, as Navicula 

 exilis: Cook, Chicago — Lake Michigan. 

 A. FOLLis (Ehr.) CI. Boyer, loc. cit., p. 325 (1927); Mills, Index Diat., 

 pp. 196, 1171 (1934). 

 Navicula trochus Ehr. 



Thomas & Chase 1887, p. 330, as Navicula trochus: Cook, Chi- 

 cago — Lake Michigan. 



