BIOLOGY 

 LIBRARY 



Entered, according to Act of Congress, in the year 1874, by 



JAMES SIMSON, 

 In the Office of the Librarian of Congress, at Washington. 



Re-ente'ed, according to Act of Congress, in the year 1878, by 



JAMES SIMSON, 

 In the Office of the Librarian of Congress, at Washington, 



EDWARD O. JENKINS 1 PRINT, 

 20 North William Street, Xew York. 



