v 



The Academy of Natural Sciences of Philadelphia, 



February 2, 1911. 



I hereby certify that printed copies of the Proceedings for 1911 were 

 mailed as follows: — 



Pages 1-16 March 16, 1911. 



17-160 April 6, 1911. 



161-232.- May 24, 1911. 



233-312 June 15, 1911. 



313-360 June 22, 1911. 



361-124 July 27, 1911. 



425-456 August 15, 1911. 



457-472 September 11, 1911. 



473-488 October 3, 1911. 



489-492 October 11, 1911. 



493-508 October 28, 1911. 



509-524 November 6, 1911. 



525-588 January 26, 1912. 



EDWARD J. NOLAN, M.D., 



Recording Secretary. 



PUBLICATION COMMITTEE! 



Henry Skinner, M.D., Witmer Stone, A.M., 



Henry A. Pilsbry, Sc.D., William J. Fox. 



Edward J. Nolan, M.D. 

 The President, Samuel G. Dixon, M.D., LL.D., ex-officio. 



EDITOR: Edward J. Nolan, M.D. 



n I * 3 



