PROCEEDINGS 



OF THE 



ACADEMY OF NATURAL SCIENCES 



OF 



PHILADELPHIA. 



1868. 



Jan. 7th, 1868. 



The President, Dr. Hays, in the Chair. 



Thirty-three members present. 



The following papers were presented for publication : 

 " Description of some extinct fishes, previously unknown." By E. 

 D. Cope. 



" Monograph of the Alcid*." By Elliott Coues, M. D., U. S. A. 



Jan. l-ith. 

 Mr. Vaux, Vice-President, in the Chair. 



Twenty-six members present. 



The death of Edward B. Grubb, of Burlington, N. J., a member 

 of the Academy, was announced. 



On leave being granted, the Committees on the following papers 

 reported in favor of their publication in the Proceedings : 



" On the habits of a Tipulideous Larva." By E. D. Cope. 



" Mechanical theory of Solar Heat." By Jacob Ennis. 



" Description of five new species of Central American Birds." By 

 Geo. N. Lawrence. 



On motion, it was resolved that these papers should be printed in 

 the Proceedings for December, 1867. 



Jan. 21st. 



Mr. Cassin, Vice-President, in the Chair. 



Twenty-three members present. 

 1868.] 1 



