1899.] NATURAL SCIENCES OF PHILADELPHIA. 497 



December 5. 



The President, Samuel G. Dixon, M.D., in the Chair. 



One hundred and twelve persons present. 



George and William S. Vaux, Jr., made an illustrated com- 

 munication on their studies of the glaciers of British Columbia 

 during the last ''summer in continuation of their earlier investiga- 

 tions. The paper, under the title " Additional Observations on 

 Glaciers of British Columbia," was presented for publication. 



December 12. 

 Charles Schaeffer, M.D., in the Chair, 

 Twenty- five persons present. 



Papers under the following titles were presented for publication : 



" Additions to the Japanese Land Snail Fauna," by Henry A. 

 Pilsbry. 



" I^otes on some Southern Mexican Shells," by Henry A. 

 Pilsbry. 



'* A New American Species of Zonitoides," by Edward G. 

 Vanatta. 



December 19. 



Mr. George Yaux, Jr., in the Chnir. 



Fourteen persons present. 



The death of Emil Fischer, M. D., a member, wa? announced. 



Mr. AVitmer Stone made a communication on the moultmg 

 of birds and variations in plumage. (No abstract.) 

 32 



