44 A CATALOG OF ILLINOIS ALGAE 



F. CONSTRICTA Ehr. Hustedt in Rab., Kryptog.-fl. Deutsch. 7(2): 166. 



f. 674a-c (1931). 



Bailey 1845, p. 34: St. Clair — Mississippi River. 



F. coNSTRUENS (Ehr.) Grun. Boyer, Proc. Acad. Nat. Sci. Phila. 78 



(Suppl. 1): 188 (1927). 



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



F. CONSTRUENS var. VENTER (Ehr.) Grun. Hustedt in Pascher, Suess- 



wass.-fl. Mitteleur. 10: 141 f. 138 (1930). 



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



F. CROTONENSis Kitton. Boyer, Proc. Acad. Nat. Sci. Phila. 78 



(Suppl. 1): 187 (1927); Mills, Index Diat., pp. 730, 1557 (1934). 

 Synedra crotonensis Grun. 



Babcock 1872A, p. 13; 1872B, p. 104; Briggs 1872A, p. 43; 

 Thomas & Chase 1887, p. 330, as Synedra crotonensis (Cook). 

 Kofoid 1908, pp. 35, 43, 50, 317 (Mason). Galtsoff 1924, pp. 

 399, 404, 405, 410 (Carroll, Hancock, Henderson, Jo Daviess, 

 Mercer, Rock Island, Whiteside). Eddy 1927B, pp. 208, 214, 219 

 (Cook). Eddy 1934, p. 400 (Cook, Lake). Daily 1938, p. 79. 

 (Cook). 



Carroll — Mississippi River (July, Sept.). Cook, Chicago, 

 Evanston — Lake Michigan (all months). Hancock, Dallas City 

 — Lake Keokuk (Mississippi River) (July, Sept.). Henderson, 

 Jo Daviess — Mississippi River (July- Sept.). Lake, Lake 

 Villa — Sand Lake ("summer"); Long Lake — in Long Lake 

 ("summer"). Mason, Havana — Illinois River (Feb.-May, Dec). 

 Mercer, Rock Island, Whiteside — Mississippi River (July- 

 Sept.). 



F. CROTONENSIS var. PROLONGATA Grun. Boyer, loc. cit. (1927). 

 Synedra crotonensis var. prolongata Grun. 

 Thomas & Chase 1887, p. 330, as S. c. var. prolongata: Cook, 

 Chicago — Lake Michigan. 



F. HARRisoNii (W. Sm.) Grun. Boyer, loc. cit., p. 189 (1927). 



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



F. HARRISONII var. rhomboides Grun. Hustedt in Pascher, Suess- 



wass.-fl. Mitteleur. 10: 140. f. 133 (1930). 



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



F. PINNATA Ehr. Hustedt, loc. cit., p. 142. f. 141 (1930); Mills, Index 



Diat., pp. 737, 741 (1934). 



Fragilaria mutabilis (W. Sm.). Grun. 



Thomas & Chase 1887, p. 328, as F. mutabilis: Cook, Chicago — 

 Lake Michigan. 



F. PINNATA var. LANCETTULA (Schum.) Hust. Hustedt in Pascher 



Suesswass.-fl. Mitteleur. 10: 142. f. 142 (1930). 



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



