viii The Biological Society of Washington. 



Pierre A. Fish : The Action of Electricity upon Nerve Cells.* 

 Vernon Bailey : Tamarack Swamps as Boreal Islands.f 



February 8, 1896 255th Meeting. 



The President in the chair and thirty-two persons present. 



The following communications were presented : 



David White : Some new Forms of Palaeozoic Alga? from the 

 Central Appalachian Region. 



Charles L. Pollard : Observations on the Flora of the District 

 of Columbia.J 



On the call for short notes 



F. V. Coville exhibited Anhcdonium lewinii, a poisonous cactus 

 from Texas ; and 



C. L. Pollard discussed Asdepias albicans as a desert plant. 



February 22, 1896 256th Meeting. 



The President in the chair and thirty persons present. 



The following communications were presented : 



C. Hart Merriam : The American Weasels. 



F. E. L. Beal: The Food of the Bluejay.|| 



David White : On the Structure and Relations of Buthograptus, 

 Plumulina, and Ptilophyton from the North American Palaeozoic. 



Sylvester D. Judd : A Peculiar Eye of an Amphipod Crusta 

 cean. 



Vernon Bailey : Two Mammals new to the Vicinity of Wash 

 ington [Synaptomys cooperi and Sorex personatus], 



March 7, 1896 257th Meeting. 



The President in the chair and thirty-three persons present. 



The following communications were presented : 



Adrian J. Pieters : The Influence of Fruit-bearing on the Me 

 chanical Tissue of the Twigs.^f 



Edward L. Greene : The Distribution of Rhamnus and Ceano- 

 thus in America.** 



*Proc. Am. Microscopical Soc., xvii, 179-185, 1895. 

 f Science, NS., iii, p. 250, February 14, 1896. 

 J Published in part in Bot. Gaz., 21, 233-235, 1896. 

 \ Synopsis of the Weasels of North America. <N. Am. Fauna, No. 11, 

 pp. 35, pis. v, text figs. 16, June 30, 1896. 



|| Yearbook IT. S. Dept. Agriculture, 1896. (In press.) 



\ Annals of Botany. (In press.) 



** Published in part in Erythea, iv, pp. 83-86, 1896. 



