xli 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 A. F. Woods and 

 Erwin F. Smith, of the Biological Society. 



May 20, 1899 aopth 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 3ioth 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. | 



Herbert J. Webber: Polyembryony in Citrus Hybrids.^ 



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

 Dept. of Agr. 



fThe Boreal Fauna and Flora of Shasta contrasted with Correspond 

 ing Faunas and Floras of the 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'. 



gScience n. s. X, pp. 681-684. 1899. 



1 15th An. Kept. Bureau of Animal Industry, U. S. Dept. of Agr., pp. 

 387-420. 1899. 



TIJour. Royal Hort. Soc. London, Vol. XXIV, under the title "Work 

 of the United States Department of Agriculture on Plant Hybridiza 

 tion". 



