1880.] natural sciences of philadelphia. 159 



May 18. 



The President, Dr. Ruschenberger, in the chair. 

 Twenty-six persons present. 



A paper entitled " On the Structure of the Oraug Outang," by 

 Henrj' C. Chapman, M. D., was presented for publication. 



The death of Wm. Logan Fox, a member, was announced. 



A fine portrait in oil, by Uhle, of Isaac Lea, LL. D., was pre- 

 sented to the Academy, and the following i-esolution was unani- 

 mously adopted : 



Re.Holved, That the thanks of the Academy be presented to 

 Dr. Isaac Lea, for his gift of an admirable portrait of himself, 

 which has been long desired by the societ}', and especially by the 

 senior members, who are cognizant of his valuable contributions 

 to science, as well as towards the prosperit}^ of the Academy. 



May 25. 



The President, Dr. Ruschenberger, in the chair. 



Twenty-two persons present. 



The " Proceedings of the Mineralogical and Geological Section 

 of the Academy of Natural Sciences of Philadelphia, for the 

 years 18lt,18t8 and 1879," was presented for publication. 



Henry S. Gratz, R. S. Peabody, Mrs. R. S. Peabody and Wil- 

 liam Barbeck, were elected members. 



Adolf E. Nordenskiold of Stockholm, Carl Ochsenius of 

 Marburg, Oscar Hertwig and Richard Hertwig of Jena, were 

 elected correspondents. 



The following were ordered to be printed : — 



