REVIEW OF THE LITERATURE 7 



geotia, Spirogyra, Zygnema and Oedogonium and followed this 

 paper (1915) with notes on the algal order Zygnematales, based on 

 specimens accumulated during eight years of collecting in east-central 

 Illinois. Further descriptions of new species, partially from Illinois, 

 were published by Transeau (1934, 1938). Transeau and Tiffany 

 (1919) described new species of Oedogonium from Coles and Mont- 

 gomery Counties, and Transeau, et al. (1934) described new species 

 of Zygnemataceae, including 12 species from Illinois waters. Tiffany 



(1927) described three new species of Oedogonium and one species 

 of Spirogyra from southeastern Illinois, and summarized (1939) the 

 Oedogoniales known to occur in Illinois. Solheim and Penfound 



(1928) reported 23 genera and 45 species and varieties of algae from 

 a small stream north of Urbana, Champaign County. 



General Ecological and Pollution Studies 



Twenty-nine papers published between 1872 and 1941 may con- 

 veniently be considered in this group. Five of these (Babcock 1872 A; 

 Daily 1938; Damann 1940, 1941; Eddy 1927B) concern the algae of 

 Lake Michigan. Babcock studied the effect of the reversal of the 

 Chicago River on Chicago hydrant water, and reported 13 genera and 

 9 species of diatoms. In a quantitative study of Lake Michigan 

 plankton, Eddy reported a total of 35 genera and 37 species and 

 varieties of phytoplankton encountered during a comparison of col- 

 lections made in the Lake at Chicago in the period from November, 

 1887, to November, 1888, with collections made from the same sta- 

 tions in 1926 and 1927. Daily listed 45 genera and 21 species and 

 varieties during his quantitative study of Lake Michigan plankton 

 at Evanston. Damann, continuing this study begun by Daily at 

 Evanston, reported only genera, mainly of diatoms. 



Two papers (Galtsoff 1924; Purdy 1922.) deal with studies of rivers 

 at Illinois State boundaries. Galtsoff conducted a limnological survey 

 of the upper Mississippi River, a part of the study taking place in 

 that section of the river extending from the northern boundary of 

 Illinois southward to Burlington, Iowa. Thirty-one genera and 29 

 species and varieties of algae were recorded from this section of the 

 river. Purdy reported 5 genera and a single species of algae from the 

 Ohio River where its course adjoins Massac and Pope Counties. 



The remaining 22 papers in this group (Adcock 1922; Agersborg 

 1930; Eddy 1924, 1925, 1927A, 1931A, B, 1934; Forbes and Richard- 

 son 1913, 1919; Gates 1912; Houdek 1923; Jewell 1920, 1922; Kofoid 

 1903, 1908; Leighton 1907; Purdy 1930; Richardson 1921; Transeau 

 1913C, 1916; Welch 1942) include some of the most important algo- 

 logical contributions from Illinois students, which have had remark- 

 able influence on the course of algological and related research in this 

 country and in other countries. Two classic studies (Kofoid 1903, 



