62 



SAY, THOMAS.-(Continued.) 



An Account of some of the Marine Shells of the United States. 

 (Read July 24th, 1851.) 



Vol. ii, Part 2, p. 221. June, 1822. 

 Vol. ii, Part 2, p. 257. August, 1822. 

 Vol. ii, Part 2, p. 302. September, 1822. 



Description of Univalve Terrestrial and Fluviatile Shells of the 

 United States. (Read December 25th.) 



Vol. ii, Part 2, p. 370. December, 1822. 



On a new Species of Modiola. (Read April 19th.) 



Vol. iv, Part 2, p. 368. May, 1825. 



Descriptions of some new Species of Freshwater and Land 

 Shells of the United States. (Read May 3d.) 



Vol. v, Part 1, p. 119. August, 1825. 



Descriptions of Marine Shells recently discovered on the Coast 

 of the United States. (Read October 18th, 1825.) 



Vol. v, Part 2, p. 207. February, 1826. 



IN LONDON PHILOSOPHICAL TRANSACTIONS. 



" On the Genus Orcythoe." Being an extract of a letter from 

 Thomas Say, Esq., of Philadelphia, to Wm. Elford Leach. (Read 

 February 4th.) 



Vol. cix, p. 107. 1819. 

 Also in Pamphlet. 



IN NICHOLSON'S ENCYCLOPEDIA. American Edition. Vol. iv. 

 1st Edition, 1816. 2d Edition, 1818. 3d Edition, 1819. 



Article " Conchology." Also republished separately as Des- 

 criptions of the Land and Freshwater Shells of the United States. 



IN NARRATIVE OF AN EXPEDITION TO THE SOURCES OF ST. PETERS' 

 RIVER, LAKE WINNEPEEK, LAKE OF THE WOODS, <fec. BY S. II. LONG. 

 2 Vols. 8vo. Philadelphia, 1821. 



Appendix, containing the Zoology of the Expedition Mollusca. 

 Vol. ii, p. 256. 



IN THE "DISSEMINATOR," NEW HARMONY, INDIANA. (Weekly Paper.) 



DESCRIPTIONS OF SOME NEW TERRESTRIAL AND FLUVIATILE SHELLS 

 OF NORTH AMERICA. 



July 29th August 12th August 26th September 9th September 23d October 7th 

 October 21st November 4th, November 18th, 1829 December 30th, 1830 January 

 15th January 29th, 1831. 

 Also in Pamphlet. New Harmony, Iml., 1840. pp. 26, Svo. 



