54 A CATALOG OF ILLINOIS ALGAE 



N. GRACILIS Ehr. Boyer, loc. cit., p. 385 (1927). 



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

 Agersborg 1930, pp. 108-110, 113: Macon, Decatur — warm 

 waste-water ditch (Dec.-Feb.). 

 M. MUTICA Kuetz. Boyer, loc. cit., p. 369 (1927), 



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

 N. OBLONGA Kuetz. Boyer, loc. cit., p. 395 (1927). 



Thomas & Chase 1887, p. 329; Ahlstrom 1936, p. 292: Cook, 

 Chicago, Evanston — Lake Michigan. 

 N. OBLONGA var. SUBCAPITATA Pant. Hustedt in Pascher, Suesswass.- 

 fl. Mitteleur. 10: 308. f. 551 (1930). 



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

 N. PLATYSTOMA Ehr. Boyer, Proc. Acad. Nat. Sci. Phila. 79 (Suppl. 2) : 

 400 (1927). 



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

 N. PROTRACTA (Grun.) CI. Hustedt in Pascher, Suesswass.-fl. Mit- 

 teleur. 10: 284. f. 472 (1930). 



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

 N. PUPULA Kuetz. Boyer, Proc. Acad. Nat. Sci. Phila. 79 (Suppl. 2) : 

 369 (1927). 



Thomas & Chase 1887, p. 329; Ahlstrom 1936, p. 292: Cook, 

 Chicago, Evanston — Lake Michigan. 

 N. RADiosA Kuetz. Boyer, loc. cit., p. 397 (1927). 

 Pinnularia radiosa W. Smith 



Transeau: Coles, Charleston— ponds (Oct., Nov.). Briggs 1872A, 

 p. 44, as Pinnularia radiosa; Thomas & Chase 1887, p. 329; 

 JeUiffe 1893, p. 310: Cook, Chicago— Lake Michigan. 

 N. RADIOSA var. tenella (Breb.) Grun. Hustedt in Pascher, Suess- 

 wass.-fl. Mitteleur. 10:299 (1930); Mills, Index Diat., pp. 1133, 1167 

 (1934). 



Navicula tenella Breb. 



Thomas & Chase 1887, p. 330, as N. tenella: Cook, Chicago — 

 Lake Michigan. 

 N. REiNHARDTii (Grun.) V. H. Boyer, Proc. Acad. Nat. Sci. Phila. 79 

 (Suppl. 2): 393 (1927). 



Thomas & Chase 1887, p. 329; Ahlstrom 1936, p. 292: Cook, 

 Chicago, Evanston — Lake Michigan. 

 N. RHYNCOCEPHALA Kuetz. Boyer, loc. cit., p. 387 (1927). 



Transeau: Coles, Charleston — small stream (Oct.). Jelliffe 1893, 

 p. 310: Cook, Chicago — Lake Michigan. Agersborg 1930, p. 106: 

 Macon, Decatur — warm waste-water ditch (Dec.-Feb.). 

 N. SALINARUM Grun. Boyer, loc. cit., p. 383 (1927). 



Baker 1922, pp. 82-84, 86, 87: Champaign, Urbana— Salt Fork 

 and Spoon River. 



