xii Proceedings of the Biological Society of Washington. 



Formal Communication: Hugh M. Smith, Address of the 

 retiring President, Some biological problems in the Yellow- 

 stone National Park. 



May i, 1920— 612th Meeting. 9 



Former President T. S. Palmer was in the chair, and 30 

 persons were present. 



J. N. Aldrich and E. D. Reid were elected to membership. 



Informal Communications: R. W. Shufeldt, Notes on the 

 salamanders of the District of Columbia, and exhibit of Sar- 

 racenia variolarius, the Spotted Trumpet Leaf from Orlando, 

 Florida, in full bloom; T. S. Palmer, Note on the tendency 

 of animals under protection or partial domestication to ad- 

 vance the breeding season; C. D. Marsh, Note on Loco Weed 

 in New Mexico and Arizona. 



Formal Communications: A. S. Hitchcock, Floral aspects 

 of British Guiana. 



May 15, 1920 — 613th Meeting. 10 



Former President T. S. Palmer was in the chair; 47 persons 

 were present. 



Informal Communications: T. S. Palmer, Note on the 

 recent meeting of the American Society of Mammalogists ; A. 

 Wetmore, Note upon bones from Porto Rican fossil deposits. 



Formal Communications : A. Wetmore, Use of Powderdown 

 feathers in birds;* W. P. Taylor, Habits of the Kangaroo Rat 

 in Arizona; E. A. Goldman, The Elk of the Jackson's Hole 

 Region in Wyoming. 



October 30, 1920 — 614th Meeting." 



Vice-President N. Hollister was in the chair; 41 persons 

 were present. 



Informal Communications: T. S. Palmer, Announcement 

 of the forthcoming meeting of the American Ornithologists' 

 Union in Washington; L. O. Howard, Note upon a flight of 

 Grasshoppers witnessed in France. 



Formal Communications: A. H. Clark, on Crinoids; W. J. 

 Swingle, Chinese botany and Chinese botanists. 



» Abstracts in Journ. Washington Acad. Sci., vol. 10, No. 20, p. 585, Dec. 4, 1920. 

 '° Abstracts in Journ. Washington Acad. Sci., vol. 10, No. 20, p. 586, Dec. 4. 1920 

 * Printed in Condor, vol. 22, No. 5, p. 168, Sept. 24, 1920. 

 " Abstracts in Journ. Washington Acad. Sci., vol. 1 1, No. 3, p. 64, Feb. 4, 1920. 



