NATURAL SCIENCES OF PHILADELPHIA. 



n 



Botany. 



Thos. Meehan, 

 Rachel Bodley, 

 Isaac Burk, 

 John H. Redfield. 



Mammalogy. 



Harrison Allen, 

 Edw. D. Cope, 

 Henry C. Chapman, 



U. Smith. 



Ichthyology. 



Edw. D. Cope, 

 Thaddeus Norris, 

 J. H. Redfield, 

 Chas. F. Parker. 



Herpetology. 



Edw. D. Cope, 

 Harrison Allen, 

 Samuel B. Howell, 

 Chas. F. Parker. 



Physics. 



Robert E. Rogers, 

 J. G. Hunt, 

 Robert Bridges, 

 J. H. McQuillan, 

 Alex. Wilcox. 



Invertebrate Paleontology. 

 T. A. Conrad, 

 H. C. Wood, Jr., 

 Persifor Frazer, Jr., 

 Geo. A. Koenig. 



Chemistry. 



F. A. Genth, 

 Robert Bridges, 

 E. Goldsmith, 

 Samuel B. Howell. 



Instruction and Lectures. 

 Hector Tyndale, 

 Robert S. Kenderdine, 

 Wm. S. Halsey, 

 J. Aitken Meigs, 

 W. S. W. Ruschenberger. 



Library. 



Jos. Leidy, 



Chas. F. Parker, 



Geo. W. Tryon, Jr., 



W. S. W. Ruschenberger, 



J, G. Richardson. 



March 3. 



The President, Dr. Ruschenberger, in the chair. 



Thirty members present. 



The following paper was presented for publication : 

 " Remarks on the Tertiary Clay of the Upper Amazon, with 

 descriptions of new shells." By T. A. Conrad. 



