5^cparimcnf of fhe inferior 



U. S. NATIONAL MUSEIBI. 



20 



BULLETIN 



<5F THS 



UNITED STATES NATIONAL MUSEUM. 



No. 17. 



0^^^\m l'm:t^^^^ 



%■ Y 



" -^'onal Museii}^' 



PUBLISHED UNDER THE DIRECTION OF THE SMITHSONIAN INSTITUTION. 



WASHINGTON: 



GOVERNMENT PEINTINa OFFICE. 



1880. 



