LIST OF WORKS 
CONTAINING THE 
CONCHOLOGICAL WEITINGS OF THOMAS SAY„ 
1. The article “ Conchology,” from the 4th ►vol. of the three American 
editions of Nicholson’s British Encyclopedia of Arts and ScienceSo 
Philadelphia, 1816, 1818, 1819. 
2. A letter on Ocythoe punctata, in the Philosophical Transactions of the 
Koyal Society. 1819. 
3. Numerous articles in the Journal of the Academy of Natural Sciences 
of Philadelphia, viz : 
Yol. I. Descriptions of seven species of American Fresh Water and 
Land Shells, not noticed in the systems. May, 1817. 
The same concluded. June, 1817. 
Descriptions of new species of Land and Fresh Water Shells of the 
United States. Oct., 1817. 
Account of two new genera, and several new species of Fresh Water 
and Land Shells. June, 1818. 
Description of a new genus of Fresh Water Bivalve Shells. Decem- 
ber, 1818. 
Vol. II. Descriptions of Univalve Shells of the United States. .Janu- 
ary, 1821. 
An account of some of the Marine Shells of the United States. 
July, 1822. 
The same continued. July, 1822. 
The same concluded. July, 1822. 
Descriptions of some Univalve Terrestrial and Fluviatile Shells of 
the United States. Dec. 1822. 
Vol. IV. On a new species of Modiola. May, 1825. 
Vol, V. Descriptions of some new species of Fresh Water and Land 
Shells of the United States. Sept., 1825. 
Descriptions of Marine Shells recently discovered on the coast of 
the United States. Feh., 1826. 
4. The “Mollusca” in the Appendix to Vol. II. of Major Long’s Second 
Expedition to the source of St. Peter’s River, &c. &c. Phila- 
delphia, 1824. 
