viii The Biological Society of Washington. 



Pierre A. Fish : The Action of Electricit}' upon Nerve Cells.* 

 Vernon Bailey : Tanmrack Swamps as ]]oreal 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 Alga3 from the 

 Central Appalachian Region. 



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

 of Columbia. I 



On the call for short notes — 



F. V. Coville exhibited Anhalonlnm leivinii, a poisonous cactus 

 from Texas ; and 



C. L. Pollard discussed Asclepins cilbirans 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 o? Bathograptus, 

 Plamulina, and Ptilophyton from the North American Palajozoic. 



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. ^ 



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

 thus in America.*''^ 



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

 t Science, N.S., iii, p. 250, February 14, 1896. 

 t 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. 



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



^ Annals of Botany. (In press.) 



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



