III. Ecological Papers : 



Evaporation and Planet Succession on the Sand Dunes of Lake 



Michigan, by George D. Fuller 119 



Seasonal Succession in Old Forest Ponds, by W. C. Allee 126 



Reproduction by Layering in the Balsam Fir and Other Conifers, 



by William S. Cooper ; Abstract 132 



Ecological Studies of the Prairie and Forest in Illinois, by C. C. 



Adams ; Abstract 133 



A Handbook for Students of Animal Ecology, by C. C. Adams; 



Outline ." 133 



IV. Biological Papers : 



A Preliminary List of the Ants of Illinois, by Maurice C. Tanquary 137 

 The Mollusca of Piatt, Champaign and Vermilion Counties, 



Illinois, by James Zetek; Abstract 142 



The Occurrence of the Rare Alga Gloeotaenium in Illinois, by 



E. N. Transeau 143 



Structure of Adult Cycad Stem, by C. J. Chamberlain; Abstract.. 144 

 Demonstration of the Movement of the Water in Leaves, by 

 Aaron H. Cole ; Abstract 145 



V. Miscellaneous Papers: 



Present Condition of the State Museum of Natural History, 

 by A. R. Crook 151 



VI. Necrology : 



Charles Reid Barnes, by John M. Coulter 157 



J. A. West, by S. A. Forbes 158 



Joseph R. Putnam 158 



John J. Ferry, B. T. Gault 159 



List of Members 161 



Index 169 



