Number 2. 



January, 1841. 



MONOGRAPH 



LIMNIADES 



FRESHWATER UNIVALVE SHELLS 



NORTH AMERICA. 



BY S. STEHMAN HALDEMAN, 



MEMBER OF THE PHILADELPHIA ACADEMY OF NATURAL SCIENCES. 



PHILADELPHIA: 

 PUBLISHED FOR THE AUTHOR BY J. DOBSON, 106 CHESNUT ST. 



E. G. Dorsey, Printer. 



Price to subscribers, One Dollar a number, of 5 plates; payable on the 

 delivery of each. Single numbers, One Dollar and Twenty-live Cents. 



