1919.] NATURAL SCIENCES OF PHILADELPHIA. 211 



December 16. 



The President, John Cadwalader, LL.D., in the Chair. 



Twenty persons present. 



Officers, Councillors, and members of the Committee on Accounts 

 were elected for the ensuing year. 



Annual Reports were received from the Recording Secretary, 

 the Corresponding Secretary, the Librarian, the Curators, the Treas- 

 urer, the auditors of the Treasm-er's accounts, the Treasurer of the 

 Manual of Conchology, the Biological and ^Microscopical Section, 

 the Entomological Section, the Botanical Section, the Ornithological 

 Section, and the Curator of the William S. Vaux Collections; and 

 a verbal report on the Mineralogical and Geological Section by 

 Mr. F. J. Keeley. 



The reception of the following papers was reported: 



