1883.] NATURAL SCIENCES OP PHILADELPHIA. 203 



October 23. 



Mr. Charles Morris in the chair. 



Six persons present. 



The deaths of Joachim Barrande, Oswald Heer and W. Kowa- 

 lewsky, correspondents, were announced. 



October 30. 

 The President, Dr. Leidy, in the chair. 

 Forty-five persons present. 



The following were presented for publication : 



" Proceedings of the Mineralogical and Geological Section of 

 the Academy of Natural Sciences of Philadelphia, from January 

 23, 1882, to November 26, 1883." 



"On the Anatomy of Ancylus lacustris and Ancylus fluviatilis," 

 by Dr. Benj. Sharp. 



" Note on a Collection of Fossils from the Hamilton (Devo- 

 nian) Group, of Pike Co., Pa.," by Prof. Angelo Heilprin. 



" Manayunkia speciosa," by Prof. Jos. Leidy. 



"On the Evidences of Glacial Action in Northern New York 

 and Canada," by Jos. Willcox. 



"Obituary Notice of Charles F. Parker," by Isaac C. Martindale. 



The death of J. Lawrence Smith, a correspondent, was announced. 

 Francis A. Cunningham and S. Mason McCoUin, M. D., were 

 elected niembers. 



Eugene A. Rau, of Bethlehem, Pa., was elected a correspondent. 

 The following were ordered to be published : 



