ADVERTISEMENT. 



The present publication (Bulletin No. 36) is tbe forty-seventh of a 

 series of papers intended to illustrate the collections belongiug to the 

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

 Smithsonian Institutiuu was placed in charge by the act of Congress 

 of August 10, 1840. 



The publicatious of the National Museum cou.sist of two series — the 

 B illetins, of which this is No. 36 in continuous series, and the Proceed- 

 ings, of which the eleventh voluuie is now in i)ress. 



The volumes of Proceedings are printed, signature by signature, each 

 issue having its own date, and a small edition of each signature is dis- 

 tributed to libniries promptly after its publication. 



Full lists of the publicatious of the Museum may be found in the cur- 

 rent catalogues of the publications of the Smithsonian Institution. 



Papers intended for publication in the Proceedings and Bulletins of 

 the National Museum are referred to the Committee on Publications, con- 

 sisting of the following members: T. H. Bean, A. Howard Clark (editor), 

 Otis T. Mason, John Murdoch, Leonhard Stejneger, Frederick W. True, 



and Lester F. Ward. 



S. P. Langley, 



Secretary of the Smithsonian Institution. 



Washington, February 25, 1889, 



