PAPERS BY MEMBERS 69 



AXXOTATED LIST OF THE ALGAE OF 

 EASTERN ILLINOIS. 



EDGAR NELSON TRANSEAU 



The following list of algae contains the names of the 

 species that have been observed and identified during- a study 

 of algae periodicity extending from January, 1908. to January, 

 1913. Xo effort has been made to name all the forms found 

 or to collect new species. All our attention has been directed 

 toward collecting the forms of interest in connection with 

 periodicity at frequent intervals. At this time a large number 

 of the 1912 collections have not been critically studied, al- 

 though almost all of them have been examined for special pur- 

 poses. A preliminary account of the classification of our algae 

 on the basis of their periodicity may be found in the ''Trans- 

 actions of the American ^Nlicroscopial Society" \'ol. 32. Xo. 

 1, Jan., 1913. As indicated in the text many of these species 

 were originally determined by Mr. F. S. Collins, without whose 

 help this study would have been impossible. Several species 

 are listed under the names I have given them in my notes. 

 These forms will be described elsewhere. Where no lo- 

 calitv is mentioned, the stations in the immediate vicinity of 

 Charleston are to be understood. In the collecting of speci- 

 mens the writer has been greatly aided by Mr. T. L. Hankin- 

 son. Mr. Homer Sampson. Mr. E. L. ^NlcCabe. Mr. Harry 

 Givens and Mr. Hanford TifTany. By their generous co- 

 operation it has been possible to make simultaneous collec- 

 tions at widely separated points in eastern Illinois. In ad- 

 dition a number of students have contributed collections of 

 no little interest. To all of these the writer makes grateful 

 acknowledgement. To anyone wishing to undertake the study 

 of the algae of his locality I would suggest the following as 

 the most useful general works. All of them possess biblio- 

 graphies of the publications dealing with special groups. 



1. F. S. Collins. The Green Algae of X'orth America. Tufts 



College Studies, ^'ol. 2. Xo. 3. pp. 80-463. 1909. 



2. F. S. Collins. The Green Algae of X'orth America (supple- 



ment). Tufts College Studies. Vol. 3. Xo. 2. pp. 70-109. 

 1912. 

 3 G. S. \\'est. A Treatise on the British Fresh Water Algae. 

 Cambridge. 1904. 



4. K. E. Hirn. Monographic und Iconographie der Oedogon- 



iaceen. Helsingfors. 1900. 



5. J. Tilden. Minnesota Algae. (Schizophyceae) Minnesota 



Botanical Survey. Minneapolis. 1909. 



6. E. Lemmermann, Kryptogamenflora der Mark Branden- 



