Publications of the United States National Museum 



The scientific publications of the United States National Museum in- 

 clude two series, Proceedings of the United States National Museum and 

 United States National Museum Bulletin. 



In these series are published original articles and monographs dealing 

 with the collections and work of the Museum and setting forth newly ac- 

 quired facts in the field of anthropology, biology, geology, history, and 

 technology. Copies of each publication are distributed to libraries and 

 scientific organizations and to specialists and others interested in the 

 various subjects. 



The Proceedings, begun in 1878, are intended for the publication, in 

 separate form, of shorter papers. These are gathered in volumes, octavo 

 in size, with the publication date of each paper recorded in the table of 

 contents of the volume. 



In the Bulletin series, the first of which was issued in 1875, appear 

 longer, separate publications consisting of monographs (occasionally 

 in several parts) and volumes in which are collected works on related 

 subjects. Bulletins are either octavo or quarto in size, depending on 

 the needs of the presentation. Since 1902, papers relating to the bo- 

 tanical collections of the Museum have been published in the Bulletin 

 series under the heading Contributions from the United States National 

 Herbarium. 



This work forms number 264 of the Bulletin series. 



Frank A. Taylor 

 Director, United States National Museum 



U S GOVERNMENT PRINTING OFFICE 

 WASHINGTON : 1968 



