1895.] Proceedings of Scientific Societies. 209 
The Biological Society of Washington.— December 15. The 
following communications were made: Mr. Charles T. Simpson, On 
the Validity of the Genus Margaritana. Prof. C. V. Riley, Some 
Interesting Results of Injury to Tree. Dr. Erwin F. Smith, The Last 
Phase of the Root Tubercle Disease. Jan. 12, 1895.—The paper of 
the evening was: The Plant Individual in the Light of Evolution, 
By Prof. L. H. Bailey of Cornell University. FREDERIC A. Lucas, 
Secretary. 
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