iy CONTENTS. 



duced into the gardens of Philadelphia from the Ar- 

 kansa Territory. By Thomas Nuttall. . 114 



Observations on several Genera and species of Fish be- 

 longing to the Natural Family of the Esoces. By 

 C. A- Le Sueur. . . . .124 



Analysis of some American Minerals. By Henry Sey- 



bert. . . . . .139 



On two veins of Pyroxene or Augite in Granite. By 



Lardner Vanuxem. . . . 146 



Descriptions of Univalve Shells of the United States. By 



Thomas Say. . . . .149 



Descriptions of Rare Plants recently introduced into the 



gardens of Philadelphia. By Thomas Nuttall. 179 



Description and Analysis of the Table Spar, from the vi- 

 cinity of Willsborougb, Lake Champlain. By Lard- 

 ner Vanuxem. . . . .182 



Geological and Mineralogical notice of a portion of the 

 North-Eastern part of the State of New York. By 

 Augustus E. Jessup. . . . 185 



Note by Publishing Committee. . . 192 



