/ 



MONOGRAPH 



OF THE 



FRESHWATER UNIVALVE MOLLUSCA 



OF THE 



UNITED STATES, 



INCLUDING NOTICES OF SPECIES IN OTHER PARTS OF NORTH AMERICA. 



BY S. S. HALDEMAN, 



Professor of Zoology in the Franklin Institute, and Vice-President of the Entomological Society of 



Pennsylvania ; Member of the Academy of Natural Sciences of Philadelphia ; of the 



Boston Society of Natural History ; of the Association of American 



Geologists and Naturalists ; and of the Societe 



Cirvierienne of Paris, etc. 



PHYSADJS. 



PHILADELPHIA: 



E. G. DORSEY, PRINTER, LIBRARY STREET. 

 1842. 



