358 PROCEEDINGS OF THE ACADEMY OF [1886. 



December 1. ^ 



Mr. Wm. W. Jefferis in the chair. 



Seventeen persons present. J 



A paper entitled, " Observations on the upper Triassic mam- 

 mals Dromatherium and Microconodon," by Henry F. Osborn, 

 So. D., was presented for publication. 



December 14. 



The President, Dr. Leidy, in the chair. 



Twent3'-one persons present. 



The death of Isaac Lea, LL. D. was announced. 



The following was ordered to be printed : 





