iS.oO.l 



MamMulogy. 



J. S. Phillips, Joseph Leidy, 



Samuel W. Woodhouse. 



Ornithology. 

 Edward Harris, John Cassin, 



John K. Townsend. 



Herpetology and Ichthyology. 

 E. Hallowell, ' R. E. Griffith, 



John Cooke. 



Conchology. 

 R. E. Griffith, T. A. Conrad, 



Henry C. Lea. 



Entomology and Crustacea. 



S. S. Haldeman, R. Bridges, 



Wm. S. Zantzinsier. 



Botany. 



R. Bridges, Wm. S. Zantzinger, 



Gavin Watson. 



Palceontology. 



T. A, Conrad, Richard C. Taylor, 



Thomas B. Wilson. 



Geology and Mineralogy. 



J. Price Wetherill, Samuel Ashmead, 



Wm. S. Vaux. 



Physics. 

 Thomas C. Percival, Samuel Powel, 



Robert Kilvington. 



Library. 

 Robert Bridges, Thomas B. Wilson, 



John Lambert. 



Committee on Proceedings. 



S. G. Morton, Wm. S. Zantzinger, 



Joseph Leidy. 



The Treasurer of the Publication Committee read the Annual Report, 

 which was adopted. 



The Auditors reported that the Treasurer's account for 1849 had 

 been examined by them, and found correct. 



The Committee to which was referred Mr. Conrad's paper, describ- 



