BIOLOGY 

 LIBRARY 



Ertf:ertd,'ffCGordn?g ,*o'Act of Congress, in the year 1874, by 



CLAXTON, REMSEN & HAFFELFINGER, 

 in the Office of the Librarian of Congress at Washington. 



>^_ ^,/v - 



J. FAGAN & SON, 

 ELECTROTYPERS, PHILAD'A. 



