ADVERTS ian T. 
This work is the tenth of a series of papers intended to illustrate 
the collections of natural history and ethnology belonging to the United 
States and constituting the National Museum, of which the Smithsonian 
Institution was placed in charge by the act of Congress of August 10, 
1846. 
It has been prepared at the request of the Institution, and printed by 
authority of the honorable Secretary of the Interior. 
JOSEPH HENRY, 
Secretary of the Smithsonian Institution. 
SMITHSONIAN INSTITUTION, 
Washington, May, 1877. 
