The Extracts have been made from the following 



works : 



1. The article Conehology, in the American edition of Nichol- 

 son's Encyclopsedia, 2d ed. Philad. 1818, vol. iv., with figures. 



2. Numerous articles in the Journal of the Academy of Natu- 

 ral Sciences of Philadelphia, vols. i. ii. v. 



3. Expedition to the Source of St. Peter's River, &c. &c., under 

 the command of Major Long. Vol. ii., Appendix, with figures. 

 Philad. 1824. 



4. American Conehology, or Descriptions of the Shells of North 

 America. Illustrated by colored figures. New Harmony, Indiana, 

 1830-34. 



5. Disseminator of Useful Knowledge. New Harmony, Indiana, 

 1829-31. 



6. Transylvania Journal of Medicine. Vol. ii., 1882. 



The extracts from the last two Journals have been made from 

 the republication by Mrs. Sat, New Harmony, 1840, under the 

 title, " Descriptions of some new Terrestrial and Fluviatile Shells 

 of North America." 



