xii The Biological Society of Washington. 



of the Chemical Society presiding, assisted by the President of 

 the Biological Society. 



The evening was devoted to a lecture by Dr. Oscar Loew on 

 'Tho Function of Mineral Substances in Organisms'* which 

 was followed by ten-minute discussions by H. W. Wiley and 

 Frank Cameron, of the Chemical Society, and Af F. Woods and 

 Erwin F. Smith, of the Biological Society. 



May 20, 1899— 309th Meeting. 



The President in the chair and 37 persons present. 



The following communications were presented: 



C. Hart Merriam: The Fauna and Flora of Mount Shasta 

 Contrasted with those of the Sierra Nevada and Cascade 

 Ranges, f 



Charles L. Pollard: Species Characters among Violets. 



Sylvester D. Judd: Birds killed by the Monument during the 

 Night of May 12, 1899. 



William Palmer: The evolution of a Subspecies. J 



October 21, 1899 — 310th Meeting. 



The President in the chair and 25 persons present. 



The following communications were presented: 



O. P. Hay: A Census of North American Fossil Verte- 

 brates. § 



V. K. Chesnut: Notes on a Preliminary Catalogue of Plants 

 Poisonous to Stock. |j 



Herbert J. Webber: Polyembryony in Citrus Hybrids. 1^ 



*Bull. No. 18, Division of Vegetable Physiology and Pathology U. S. 

 Dept. of Agr. 



f The Boreal Fauna and Flora of Shasta contrasted with Correspond- 

 ing Faunas and Floras of tlie Sierra and the Cascades. N. Am. Fauna 

 No. 16, pp. 69-82, October 28, 1899. 



:|:Auk. July, 1900. Under the title 'Ecology of the Maryland Yel- 

 lowthroat and Its Relatives'. 



t^Science n. s. X, pp. 681-684. 1899. 



||15lh An. Kept. Bureau of Animal Industry, U. S. Dept. of Agr., pp. 

 387-420. 1899. 



^jJoiir. Royal ITort. Soc. London, Vol. XXIV, under the title "Worli 

 of tlie United States Department of Agriculture on Plant Hybridiza- 

 tion". 



