xiv The Biological Society of Washington. 



are occasionally found similar to the specimens of Ampelopsis 

 tricuspidata exhibited at the preceding meeting. 



F. V. Coville exhibited an entire and bisected cone of Pinus 

 attemiata both covered with lichens. These cones it was stated 

 remain on the trees from twenty to fifty years and seem to open 

 and release the seeds only when exposed to great heat, so that 

 no seedlings of this pine were to be seen except where the 

 ground had been swept over by fire. 



The following communications were presented: 



L. H. Dewey: Frost Flowers. 



H. J. Webber: The Effect of Hybridization in the Origina- 

 tion of Cultivated Plants.* 



O. P. Hay: The Chronological Distribution of Elasmo- 

 branchs. f 



December i6, 1899 314th Meeting. 



The President in the chair and 24 persons present. 

 H. J. Webber spoke of the necessity for a new horticultural 

 term like race to refer to varieties of cultivated plants propa- 

 gated by vegetative parts. 



G. K. Gilbert called attention to the necessity for a broad 

 term to apply to the sum of plants and animals occurring in a 

 region. Attention was called to the word life. 

 The following communications were presented: 

 Lester F. Ward: The fossil Forests of Arizona. J 

 F. A. Lucas: Blue Fox Trapping in the Pribilofs.§ 

 M. B. Waite: Soil Inoculation Experiments with Soy Beans. 



December 30, 1899— 315th Meeting. 



TWENTIETH ANNUAL MEETING. 



The President in the chair and 1 1 persons present. 



The annual reports of the Recording Secretary and Treasurer 



*Yearbook U. S. Dept. of Agr. 1899, pp. 4()5-490, incorporated in an 

 article entitled "Progress of Plant-breedinjif in Uie United States." 



f Will appear in Trans. Am. Pliil. See. 



:j:Published as "Report on the Petrified Forests of Arizona". Dept. 

 of the Interior, 1900. 



^Science, Jan. 26, 1900, pp. 125-128. 



