55 



available at the time in a way to explain the habit preferences 

 on the part of fishes. Special attention has been given to a 

 small stream near the grounds of the Normal School, the 

 product of which will be presented by Mr. Hankinson in a 

 paper to be read at this meeting. 



Mr. Transeau's work relates to the plant formations of the 

 Charleston region, and to habitat and seasonal relations of 

 the algae. Under the first of these heads he has made record 

 of the vegetation of about thirty localities, in an attempt to 

 get at the trend of succession. He has made some progress in 

 the determination of the evaporation constants for several 

 woodland types and topographical situations. He has made 

 more than a hundred collections of algae representing all the 

 habitats and all the seasons and about forty-five species of 

 algae. In connection with this work some experiments have 

 been made on the effect of a change of environment on the 

 form of algae. 



Mr. Gleason began, during the summer of 1909, prelimi- 

 nary work on the forest associations of Champaign county, 

 with particular reference to their relation to the drainage 

 systems. It is planned to push the investigation further dur- 

 ing the spring and autumn of 1910, and to produce eventually 

 a complete vegetation map of the county, showing the present 

 and past distribution of every plant association, and accom- 

 panied by descriptions of the vegetation and its ecological 

 relations. Since this work will be done chiefly in connection 

 with the advanced classes in ecology in the University, it will 

 probably require several years for its completion. Material is 

 being slowly accumulated from the Mason Historical Library 

 relative to the original distribution and structure of the various 

 types of vegetation of the state. 



The results of the field work on the sand dune vegetation 

 of the state have been elaborated and are now ready for publi- 

 cation. 



Mr. Adams has begun an inquiry into the sources of ecologic- 

 al data preliminary to a general treatment of the subject of 

 Illinois as a biotic environment. He also made, for the State 



