JVo. 3. 



MONOGRAPHY 



FAMILY UNION ID JE , 



OR NAIADES OF LAMARCK, 



(FRESH WATER BIVALVE SHELLS,) 



OF 



NORTH AMERICA, 



ILLUSTRATED BY FIGURES DRAWN ON STOJME FROM NATURE. 



BY T. A. CONRAD, 



CURATOR OF THE ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA, HONORARY MEMBER OF 

 THE GEOLOGICAL SOCIETY OF PENNSYLVANIA. 



PHILADELPHIA: 

 J. DOBSON, 108 CHESNUT STREET. 



LONDON: 

 O. RICH, No. 12, RED LION SQUARE. 



PARIS: 

 ARTHUS BERTRAND, FILS, RUE HAUTEFEUILLE No. 23. 



HAMBURG : 

 PERTHES & BESSER, No. 22, AM JUNGFERNSTIEG. 



E. G. DORSEY, PRINTER. 



February 1836. 



