Mn/l FIRST BOOKS OF NATURAL HISTORY. 



ELEMENTS OF CONCHOLOGY: 



PREPARED FOR THE USE OF 



SCHOOLS AND COLLEGES, 



BY 



W. S. W. RUSCHENBERGER, M.D. 



Surgeon in the U. S. Navy; Fellow of the College of Physicians; Hoo. 



Member of the Philadelphia Medical Society ; Member of the 



Academy of Natural Sciences of Philadelphia, &;c. kc. 



FROM THE TEXT OF 



MH.NE EDWARDS, AND ACHILLE COMTE, 



FROFESSOKS OF NATURAL IIISTOEY IN THE COLLEGES 

 OF HENRI IV, AND CHARLEMAGNE. 



■WITH PLATES. 



PHILADELPHIA: 

 GRIGG & ELLIOT, 



NO. 9 NORTH FOURTH STREET, 



1845. 



