7 



.Vo. 1. 



M N G R A P H Y 



FA3IILY UXIOXID.i! 



OR NAIADES OF LAMARCK. 



^FRESH WATER BIVALVE SHELLS.' 



OF 



NORTH AMERICA., 



ILLUSTRATED BV FIGURES DRAWN ON STONE FROM NATURE. 



BY T. A. CO.\ HAD. 



CURATOR OF THE ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA. BOMBAST SIE1IBEK OF 

 THE GEOLOGICAL SOCIETY OF PENNSYLVANIA. 



SMITHSONIAN INSTITUTION 



WASHINGTON 25, D.C# 



PHILADELPHIA: 



J. DOBSON, LOG CHESNUT STREET. 



E. G. DORSEY, PRINTER. 



/>• a ::'. ■ 1835. 



