RTJSCKENBERGER'S SEHIES, 



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 ; Hon. 



Member of the Philadelphia Medical Society ; Member of the 



Academy of Natural Sciences of Philadelphia. Sec. &c. 



FROM THE TEXT OF 



MILNE EDWARDS, AND ACHILLE COMTE, 



PROFESSORS OF NATURAL HISTORY IN THE COLLEGES 

 OF HENRI IV, AND CHARLEMAGNE. 



WITH PLATES. 



PHILADELPHIA: 

 GRIGG & ELLIOT, 



NO. 9 NORTH FOURTH STREET, 



1845. 



