REVIEW OF THE LITERATURE 9 



Adcock (1922) and Houdek (1923) are the results of ecological inves- 

 tigations of Lake Knox, near Galesburg, in Knox County. In these 

 papers only a few algae are mentioned — 2 genera and 1 species in the 

 former, and 11 genera in the latter. Gates (1912) listed 2 genera of 

 algae from Lake County in his study of the vegetation of beach areas. 



Studies of Algae as Animal Food Supply 



Forbes (1880, 1883B, 1888A, B) reported the results of investiga- 

 tions of plants used as a source of food by freshwater fishes in Illinois. 

 In each of these papers a few algae, usually only genera, were re- 

 corded. The only other study of algae in relation to the foods of 

 Illinois fishes that has come to the attention of the writer is that of 

 Eddy and Simer (1928), who examined the stomach contents of the 

 paddlefish (Polydon spathula) taken from the Illinois River at Mere- 

 dosia, Morgan County. This analysis resulted in the listing of 6 

 genera and 4 species of algae. 



Baker (1922), in a study of the Mollusca of the Big Vermilion River 

 in Champaign County, reported the occurrence of 7 genera and 8 

 species of algae identified by E. N. Transeau. 



Monographs and Other Comprehensive Reports 



Thirteen papers known to the writer may be included in this group. 

 In these, the Illinois records are usually but not always summaries 

 of distribution, the various species having been previously reported 

 in other publications. 



F. S. Collins (1909) published "The Green Algae of North Amer- 

 ica," a volume which for many years was the standard English- 

 language reference available to students of North American algae. 

 Thirteen genera and 23 species and varieties of Chlorophyceae from 

 the collections of E, N. Transeau are included. This volume was 

 followed by two supplements (Collins 1912, 1918), the first of which 

 contained mention of 5 genera and 11 species of Illinois algae, also 

 from the Coles County collections of E. N. Transeau. In the second 

 supplement, Collins indicated the growing interest of botanists in the 

 algae, and noted the increased numbers of species recorded for the 

 United States since the publication of the two preceding volumes. 

 According to Collins, "the largest contributors to this increase have 

 been E. N. Transeau and G. M. Smith." Transeau's earlier papers 

 are acknowledged, and his records of Illinois Chlorophyceae, includ- 

 ing 6 genera and 50 species, mainly Oedogoniaceae and Zygnemata- 

 ceae, added to the supplement. 



Tilden (1910) included 5 genera and 6 species of Myxophyceae 

 from Cook County in her "Myxophyceae of North America." These 

 were contributions of L. N. Johnson and C. B. Atwell. 



