RUSCHESTBEHGER'S SERIES. 



FIRST BOOKS OF NATURAL HISTORY. 



ELEMENTS OF HERPETOLOGY, 



AND OP 



ICHTHYOLOGY: 



PREPARED FOR THE USE OF 



SCHOOLS AND COLLEGES, 



BY 



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



Burgeon in the U. S. Navy ; Fello-w of the College of Physicians ; Hon. 



Member of the Philadelphia Medical Society ; Member of the 



Academy of Natural Sciences of Philadelphia, Sec. Sec. 



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, 



1844. 



