S^cparfmcnf of fhe inferior: 



U. S. NATIONAL MUSEUM. 

 Serial Number 41 



BULLETIlSr 



OP THK 



UNITED STATES NATIONAL MUSEUM. 



No. 31. 



FOBLISHED UNDER THE DIRECTION OF THE SMITHSONIAN INSTITUnON. 



GOVEENMENT PRINTING OFFICE. 

 1886. 



