Vol. XI, pp. vii-xii December 30. 1897 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



PROCEEDINGS. 



The Society meets in the Assembly Hall of the Cosmos Club 

 on alternate Saturdays at 8 ]). m. Brief notices of the meetings, 

 with abstracts of the papers, are published in Science. 



January 2, 1897— 269th Meeting. 



The President in the chair and 45 persons present. 

 F. A. Lucas exhibited skulls of the fur-seal showing deform- 

 ities of the jaw-bones. 



The following communications were presented : 



E. W. Nelson: New Birds from Mexico.* 



F. A. Lucas : On the Natural Mortality among Fur-seals. 



January 16, 1897— 270th Meeting. 



The President in the chair and 36 persons present. 



Tlieo. Holm exhibited a copy of Fuchs' ' Histoire des Plantes,' 

 published in 1549 ; also the first and last volumes of the ' Flora 

 Danica.' He then exhibited a specimen of Draba hyperborea, 

 calling attention to its monopodial development. 



W. T. Swingle exhibited some alga3 from the Bay of Naples, 

 remarkable for the size of their special cells. 



V. K. Chesnut showed specimens of Cicuta vagans and Nerium 

 oleander, discussing their poisonous properties. 



The following communications were presented : 



David White : Unity or Plurality of Type Specimens in 

 Palaeontology. 



*The Auk, XIV, pp. 42-76, Jan., 1897. 



(vii) 



