xii Proceedings of the Biological Society of Washington. 



in the Open, and to a visit of its author to one of the Society's 

 meetings when he was Assistant Secretary of the Navy. 



Formal communications: Alexander Wetmore, Lead poisoning 

 in waterfowl; A. S. Hitchcock, Generic types; W. W. Eggleston, 

 Thomas Nuttall's trip to Oregon in 1834, with notes on the 

 route. 



May 4, 1918— 585th Meeting.* 



Meeting House of Friends' School, 1809 I Street N. W. 



President Rose in the chair; 26 persons present. 



Informal communications: Paul Bartsch, Remarks on a rhodo- 

 dendron thicket; nesting of starlings and a terrestrial burrow- 

 ing spider; Alexander Wetmore, Remarks on and exhibition of 

 fragment of bone of Puffinus from Calvert Cliffs, Chesapeake 

 Beach, Maryland. 



Formal communications: Martha Brewer Lyon, Fauna of the 

 human eye; Maynard M. Metcalf, Opalina and the origin of 

 the Ciliata. 



May 18, 1918— 586th Meeting.! 



Meeting House of Friends' School, 1809 I Street N. W. 



President Rose in the chair; 50 persons present. 



Rudolph Martin Anderson, W. C. Henderson, Ralph V. 

 Chamberlin, J. R. de la Torre Bueno and Amos W. Butler were 

 elected to membership. 



Informal communication: W. L. McAfee called attention to 

 the appearance of Bulletin No. 1, A Sketch of the Natural 

 History of the District of Columbia, together with an indexed 

 edition of the U. S. Geological Survey's 1917 Map of Wash- 

 ington and Vicinity. 



Formal communication: Dr. J. C. Merriam gave an illustrated 

 lecture on Cave Hunting in California. 



Owing to the prevalence of the pandemic of influenza and the 

 desire of the health authorities that public gatherings be omitted, 

 no meetings of the Society were held during October, and only 

 one in November. 



* Abstracts in Journ. Washington Acad. Sci., vol. 8, pp. 413, 414, June 19, 1918. 

 t Abstracts in Journ. Washington Acad. Sci., vol. 8, p. 542, September 19, 1918. 



