ADVERTISEMENT. 



This work is the tliirteeiitli of a series of papers inteuded to illustrate 

 the collections of natural history and etlinology belonging to tlie 

 United States, and constituting the National Museum, of which the 

 Smithsonian Institution w^as placed in charge by the act of Congress of 

 August 10, 1840. 



It has been prepared at the request of the Institution, and printed by 

 authority of the honorable Secretary of the Interior. 



SPENCER r. BAIRD, 

 Secret art/ of ike Smithsonian Institution. 

 Smithsonian Institution, 

 Washington, May, 1879. 



