CLASSIFIED CATALOG OF ILLINOIS ALGAE 55 



N. SALINARUM var. INTERMEDIA (Grun.) CI. Mills, Index Diat., p. 

 1141 (1934). 



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

 N. SCUTELLOIDES W. Smith. Boyer, Proc. Acad. Nat. Sci. Phila. 79 

 (Suppl. 2): 409 (1927). 



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

 N. SEMINULUM Grun. Boyer, loc. cit., p. 368 (1927); Mills, Index 

 Diat., pp. 1142, 1147 (1934). 

 Navicula saugerri Desmaz. 



Thomas & Chase 1887, p. 329, as N. saugerri: Cook, Chicago — 



Lake Michigan. 

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

 Navicula punctata Donk. 



Thomas & Chase 1887, p. 329, 330, also as N. punctata: Cook, 



Chicago — Lake Michigan. 

 N. VIRIDULA Kuetz. Boyer, loc. cit., p. 388 (1927). 



Thomas & Chase 1887, p. 330; Ahlstrom 1936, p. 292: Cook, 



Chicago, Evanston — Lake Michigan. 



NEIDIUM Pfitzer, 1871 



N. AMPHiGOMPHUS (Ehr.) Pfitz. Boyer, loc. cit., p. 322 (1927). 

 Navicula iridis var. amphigomphus (Ehr.) V. H. 



Thomas & Chase 1887, p. 329, as Navicula i. var. amphigomphus: 

 Cook, Chicago — Lake Michigan. 

 N. AMPHIRHYNCUS (Ehr.) Pfitz. Boyer, loc. cit., p. 321 (1927). 



Navicula amphirhyncus Ehr.; Navicula iridis var. amphirhyncus 

 (Ehr.) V. H. 



Thomas & Chase 1887, p. 329, as Navicula i. var. amphirhyncus: 

 Cook, Chicago — Lake Michigan. Bailey 1845, p. 34, as Navicula 

 amphirhyncus: St. Clair — Mississippi River. 

 N. DUBIUM (Ehr.) Pfitz. Boyer, loc. cit., p. 322 (1927). 

 Navicula duhia Ehr. 



Thomas & Chase 1887, p. 329, as Navicula dubia: Cook, Chicago 

 — Lake Michigan. 

 N. HiTCHCOCKii (Ehr.) CI. Boyer, loc. cit. (1927). 

 Navicula hitchcockii Ehr. 



Thomas & Chase 1887, p. 329, as Navicula hitchcockii: Cook, 

 Chicago — Lake Michigan. 

 N. iRiDis (Ehr.) Pfitz. Boyer, loc. cit., p. 321 (1927). 

 Navicula iridis Ehr. 



Thomas & Chase 1887, p. 329, as Navicula iridis: Ahlstrom 1936, 

 p. 292: Cook, Chicago, Evanston — Lake Michigan. Kofoid 1908, 

 p. 57, as Navicula iridis: Mason, Havana — Illinois River ("colder 



■™"*^"'- X^CNilC^ 



